implement texture atlases for sprites, allow storage of assets not from a loader

.vscode/launch.json

@@ -4,6 +4,24 @@
     // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
     "version": "0.2.0",
     "configurations": [
+        {
+            "type": "lldb",
+            "request": "launch",
+            "name": "Debug lyra dim_2d example",
+            "cargo": {
+                "args": [
+                    "build",
+                    "--manifest-path", "${workspaceFolder}/examples/2d/Cargo.toml"
+                    //"--bin=testbed",
+                ],
+                "filter": {
+                    "name": "dim_2d",
+                    "kind": "bin"
+                }
+            },
+            "args": [],
+            "cwd": "${workspaceFolder}/examples/2d"
+        },
         {
             "type": "lldb",
             "request": "launch",

Cargo.lock

@@ -515,9 +515,9 @@ checksum = "79296716171880943b8470b5f8d03aa55eb2e645a4874bdbb28adb49162e012c"
 
 [[package]]
 name = "bytemuck"
-version = "1.18.0"
+version = "1.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94bbb0ad554ad961ddc5da507a12a29b14e4ae5bda06b19f575a3e6079d2e2ae"
+checksum = "8334215b81e418a0a7bdb8ef0849474f40bb10c8b71f1c4ed315cff49f32494d"
 dependencies = [
  "bytemuck_derive",
 ]
@@ -1893,6 +1893,7 @@ dependencies = [
 name = "lyra-math"
 version = "0.1.0"
 dependencies = [
+ "bytemuck",
  "glam",
 ]
 

crates/lyra-ecs/lyra-ecs-derive/src/lib.rs

@@ -1,5 +1,5 @@
 use quote::quote;
-use syn::{parse_macro_input, DeriveInput};
+use syn::{parse_macro_input, spanned::Spanned, DeriveInput};
 
 #[proc_macro_derive(Component)]
 pub fn derive_component(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
@@ -17,3 +17,53 @@ pub fn derive_component(input: proc_macro::TokenStream) -> proc_macro::TokenStre
         }
     })
 }
+
+#[proc_macro_derive(Bundle)]
+pub fn derive_bundle(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
+    let input = parse_macro_input!(input as DeriveInput);
+    let (impl_generics, ty_generics, where_clause) = input.generics.split_for_impl();
+
+    let type_ident = &input.ident;
+
+    let s = match &input.data {
+        syn::Data::Struct(s) => {
+            s
+        },
+        _ => {
+            return syn::Error::new(input.span(), "Bundle derive macro only supports Structs")
+                .into_compile_error().into();
+        }
+    };
+
+    let field_names: Vec<_> = s.fields.iter().map(|f| f.ident.as_ref().unwrap()).collect();
+
+    proc_macro::TokenStream::from(quote! {
+        impl #impl_generics lyra_engine::ecs::Bundle for #type_ident #ty_generics #where_clause {
+            fn type_ids(&self) -> Vec<lyra_engine::ecs::DynTypeId> {
+                let mut v = vec![];
+                #(
+                    v.extend(self.#field_names.type_ids().into_iter());
+                )*
+                v
+            }
+        
+            fn info(&self) -> Vec<lyra_engine::ecs::ComponentInfo> {
+                let mut v = vec![];
+                #(
+                    v.extend(self.#field_names.info().into_iter());
+                )*
+                v
+            }
+        
+            fn take(self, f: &mut impl FnMut(std::ptr::NonNull<u8>, lyra_engine::ecs::DynTypeId, lyra_engine::ecs::ComponentInfo)) {
+                #(
+                    self.#field_names.take(f);
+                )*
+            }
+        
+            fn is_dynamic(&self) -> bool {
+                false
+            }
+        }
+    })
+}

crates/lyra-ecs/src/archetype.rs

@@ -348,7 +348,7 @@ impl Archetype {
         self.entity_ids.insert(entity, entity_index);
         self.entities.push(entity);
 
-        bundle.take(|data, type_id, info| {
+        bundle.take(&mut |data, type_id, info| {
             self.put_component_at(
                 tick,
                 data,
@@ -621,7 +621,7 @@ impl Archetype {
         }
 
         for (eid, bundle) in new_columns.into_iter().enumerate() {
-            bundle.take(|ptr, tyid, _size| unsafe {
+            bundle.take(&mut |ptr, tyid, _size| unsafe {
                 let col = self.get_column_mut(tyid).unwrap();
                 col.insert_entity(eid, ptr, tick.clone());
             });

crates/lyra-ecs/src/bundle.rs

@@ -11,7 +11,7 @@ pub trait Bundle {
 
     /// Take the bundle by calling the closure with pointers to each component, its type and size.
     /// The closure is expected to take ownership of the pointer.
-    fn take(self, f: impl FnMut(NonNull<u8>, DynTypeId, ComponentInfo));
+    fn take(self, f: &mut impl FnMut(NonNull<u8>, DynTypeId, ComponentInfo));
 
     /// Returns a boolean indicating if this Bundle is dynamic. See [`DynamicBundle`]
     fn is_dynamic(&self) -> bool;
@@ -26,7 +26,7 @@ impl Bundle for () {
         vec![ComponentInfo::new::<()>()]
     }
 
-    fn take(self, mut f: impl FnMut(NonNull<u8>, DynTypeId, ComponentInfo)) {
+    fn take(self, f: &mut impl FnMut(NonNull<u8>, DynTypeId, ComponentInfo)) {
         f(NonNull::from(&self).cast(), DynTypeId::of::<()>(), ComponentInfo::new::<()>());
     }
 
@@ -44,7 +44,7 @@ impl<C: Component> Bundle for C {
         vec![ComponentInfo::new::<C>()]
     }
 
-    fn take(self, mut f: impl FnMut(NonNull<u8>, DynTypeId, ComponentInfo)) {
+    fn take(self, f: &mut impl FnMut(NonNull<u8>, DynTypeId, ComponentInfo)) {
         f(NonNull::from(&self).cast(), DynTypeId::of::<C>(), ComponentInfo::new::<C>());
 
         // this must be done to avoid calling drop on heap memory that the component
@@ -59,29 +59,41 @@ impl<C: Component> Bundle for C {
 
 macro_rules! impl_bundle_tuple {
     ( $($name: ident),+ ) => (
+        // these names wont follow rust convention, but its a macro so deal with it
         #[allow(non_snake_case)]
-        impl<$($name: Component),+> Bundle for ($($name,)+) {
+        impl<$($name: Bundle),+> Bundle for ($($name,)+) {
+            #[inline(always)]
             fn type_ids(&self) -> Vec<DynTypeId> {
-                // these names wont follow rust convention, but its a macro so deal with it
-                vec![$(DynTypeId::of::<$name>()),+]
+                let ($($name,)+) = self;
+
+                let mut v = vec![];
+                $(
+                    v.extend($name.type_ids().into_iter());
+                )+
+                v
             }
 
+            #[inline(always)]
             fn info(&self) -> Vec<ComponentInfo> {
-                vec![$(ComponentInfo::new::<$name>()),+]
+                let ($($name,)+) = self;
+
+                let mut v = vec![];
+                $(
+                    v.extend($name.info().into_iter());
+                )+
+                v
             }
 
-            fn take(self, mut f: impl FnMut(NonNull<u8>, DynTypeId, ComponentInfo)) {
-                // these names wont follow rust convention, but its a macro so deal with it
+            #[inline(always)]
+            fn take(self, f: &mut impl FnMut(NonNull<u8>, DynTypeId, ComponentInfo)) {
                 let ($($name,)+) = self;
 
                 $(
-                    f(NonNull::from(&$name).cast(), DynTypeId::of::<$name>(), ComponentInfo::new::<$name>());
-                    // this must be done to avoid calling drop on heap memory that the component
-                    // may manage. So something like a Vec, or HashMap, etc.
-                    std::mem::forget($name);
+                    $name.take(f);
                 )+
             }
 
+            #[inline(always)]
             fn is_dynamic(&self) -> bool {
                 false
             }
@@ -166,7 +178,7 @@ impl DynamicBundle {
     where
         B: Bundle
     {
-        bundle.take(|ptr, _, info| {
+        bundle.take(&mut |ptr, _, info| {
             // unfortunately the components in the bundle must be copied since there is no guarantee that
             // `bundle` lasts for as long as the `DynamicBundle`. If the data wasn't copied, the pointers
             // could be invalid later.
@@ -192,7 +204,7 @@ impl Bundle for DynamicBundle {
         self.bundle.iter().map(|b| b.1).collect()
     }
 
-    fn take(self, mut f: impl FnMut(NonNull<u8>, DynTypeId, ComponentInfo)) {
+    fn take(self, f: &mut impl FnMut(NonNull<u8>, DynTypeId, ComponentInfo)) {
         for (data, info) in self.bundle.into_iter() {
             f(data, info.type_id(), info);
         }
@@ -202,3 +214,70 @@ impl Bundle for DynamicBundle {
         true
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use lyra_ecs_derive::{Bundle, Component};
+    use crate::{lyra_engine, ComponentInfo, World};
+
+    use super::Bundle;
+
+    #[allow(dead_code)]
+    #[derive(Component, PartialEq, Clone, Copy, Debug)]
+    struct Vec2 {
+        x: f32,
+        y: f32,
+    }
+
+    #[allow(dead_code)]
+    #[derive(Component, Debug, PartialEq, Eq, Clone, Copy)]
+    enum SomeFlag {
+        SomethingA,
+        SomethingB,
+    }
+
+    #[derive(Bundle)]
+    struct CompBundle {
+        pos: Vec2,
+        flag: SomeFlag
+    }
+
+    #[test]
+    fn check_bundle_order() {
+        let b = CompBundle {
+            pos: Vec2 {
+                x: 10.0, y: 10.0,
+            },
+            flag: SomeFlag::SomethingA,
+        };
+
+        let info = b.info();
+        let mut info = info.into_iter();
+
+        assert_eq!(info.next().unwrap(), ComponentInfo::new::<Vec2>());
+        assert_eq!(info.next().unwrap(), ComponentInfo::new::<SomeFlag>());
+    }
+
+    #[test]
+    fn check_bundle_spawn() {
+        let b_pos = Vec2 {
+            x: 10.0, y: 10.0,
+        };
+        let b_flag = SomeFlag::SomethingA;
+        let b = CompBundle {
+            pos: b_pos,
+            flag: b_flag,
+        };
+
+        let mut world = World::new();
+        let e = world.spawn(b);
+
+        let pos = world.view_one::<&Vec2>(e).get()
+            .expect("failed to find spawned Vec2 from Bundle on Entity");
+        assert!(pos.x == b_pos.x && pos.y == b_pos.y, "Spawned Vec2 values were not correct, got: {:?}, expected: {:?}", *pos, b_pos);
+        
+        let flag = world.view_one::<&SomeFlag>(e).get()
+            .expect("failed to find spawned SomeFlag from Bundle on Entity");
+        assert_eq!(*flag, b_flag);
+    }
+}

crates/lyra-ecs/src/component_info.rs

@@ -49,13 +49,6 @@ impl DynTypeId {
             DynTypeId::Unknown(_) => panic!("This type is unknown to rust, cannot construct a TypeId from it!"),
         }
     }
-
-    pub fn as_unknown(&self) -> Option<u128> {
-        match self {
-            DynTypeId::Rust(_) => None,
-            DynTypeId::Unknown(id) => Some(*id),
-        }
-    }
 }
 
 /// Some information about a component.

crates/lyra-ecs/src/query/filter/mod.rs

@@ -1,6 +1,4 @@
 mod has;
-use std::marker::PhantomData;
-
 pub use has::*;
 
 mod or;

crates/lyra-ecs/src/query/resource.rs

@@ -112,7 +112,7 @@ impl<'a, T: ResourceObject> Res<'a, T> {
 
     /// Returns a boolean indicating if the resource changed.
     pub fn changed(&self) -> bool {
-        *self.inner.tick >= *self.world_tick - 1
+        self.inner.changed(self.world_tick)
     }
 
     /// The tick that this resource was last modified at
@@ -236,7 +236,7 @@ impl<'a, T: ResourceObject> ResMut<'a, T> {
     }
 
     pub fn changed(&self) -> bool {
-        *self.inner.tick - 1 >= *self.world_tick - 1
+        self.inner.changed(self.world_tick)
     }
 
     /// The tick that this resource was last modified at

crates/lyra-ecs/src/resource.rs

@@ -2,7 +2,7 @@ use std::{any::{Any, TypeId}, sync::Arc};
 
 use atomic_refcell::{AtomicRef, AtomicRefCell, AtomicRefMut};
 
-use crate::{Tick, TickTracker};
+use crate::Tick;
 
 /// Shorthand for `Send + Sync + 'static`, so it never needs to be implemented manually.
 pub trait ResourceObject: Send + Sync + Any {
@@ -25,6 +25,14 @@ pub struct TrackedResource<T: ?Sized> {
     pub res: T,
 }
 
+impl<T: ?Sized> TrackedResource<T> {
+    pub fn changed(&self, tick: Tick) -> bool {
+        let tick = tick.checked_sub(1).unwrap_or(0);
+        //println!("self: {}, world: {}", *self.tick, tick);
+        *self.tick >= tick
+    }
+}
+
 /// A type erased storage for a Resource.
 #[derive(Clone)]
 pub struct ResourceData {
@@ -89,6 +97,6 @@ impl ResourceData {
     }
 
     pub fn changed(&self, tick: Tick) -> bool {
-        *self.data.borrow().tick >= *tick - 1
+        self.data.borrow().changed(tick)
     }
 }

crates/lyra-ecs/src/world.rs

@@ -180,7 +180,7 @@ impl World {
             let entry_idx = *current_arch.entity_indexes()
                 .get(&entity).unwrap();
 
-            bundle.take(|ptr, id, _info| {
+            bundle.take(&mut |ptr, id, _info| {
                 let col = current_arch.get_column_mut(id).unwrap();
                 unsafe { col.set_at(entry_idx.0 as _, ptr, tick) };
             });
@@ -459,6 +459,8 @@ impl World {
     }
 
     /// Gets a resource from the World.
+    /// 
+    /// Returns `None` if the resource wasn't found, or is already borrowed.
     pub fn get_resource<T: ResourceObject>(&self) -> Option<Res<T>> {
         self.get_tracked_resource::<T>().map(|r| Res {
             inner: r,
@@ -476,20 +478,24 @@ impl World {
 
     /// Gets a reference to a change tracked resource.
     /// 
+    /// Returns `None` if the resource wasn't found, or is already borrowed.
+    ///
     /// You will have to manually downcast the inner resource. Most people don't need this, see
     /// [`World::get_resource`].
     pub fn get_tracked_resource<T: ResourceObject>(&self) -> Option<AtomicRef<TrackedResource<dyn ResourceObject>>> {
         self.resources.get(&TypeId::of::<T>())
-            .map(|r| r.data.borrow())
+            .and_then(|r| r.data.try_borrow().ok())
     }
 
     /// Gets a mutable borrow to a change tracked resource.
     /// 
+    /// Returns `None` if the resource wasn't found, or is already borrowed.
+    /// 
     /// You will have to manually downcast the inner resource. Most people don't need this, see
     /// [`World::get_resource_mut`].
     pub fn get_tracked_resource_mut<T: ResourceObject>(&self) -> Option<AtomicRefMut<TrackedResource<dyn ResourceObject>>> {
         self.resources.get(&TypeId::of::<T>())
-            .map(|r| r.data.borrow_mut())
+            .and_then(|r| r.data.try_borrow_mut().ok())
     }
 
     /// Returns a boolean indicating if the resource changed.
@@ -791,14 +797,18 @@ mod tests {
         world.add_resource(SimpleCounter(50));
 
         assert!(world.has_resource_changed::<SimpleCounter>());
+        world.tick();
 
         world.spawn(Vec2::new(50.0, 50.0));
+        world.tick();
      
         assert!(!world.has_resource_changed::<SimpleCounter>());
+        world.tick();
 
         let mut counter = world.get_resource_mut::<SimpleCounter>()
             .expect("Counter resource is missing");
         counter.0 += 100;
+        drop(counter);
 
         assert!(world.has_resource_changed::<SimpleCounter>());
     }

crates/lyra-game/src/input/action.rs

@@ -493,7 +493,7 @@ impl ActionHandlerBuilder {
 //fn actions_system(world: &mut World) -> anyhow::Result<()> {
 fn actions_system(
     input_btns: Res<InputButtons<KeyCode>>,
-    mut mouse_ev: EventReader<MouseMotion>,
+    mouse_ev: EventReader<MouseMotion>,
     mut handler: ResMut<ActionHandler>,
 ) -> anyhow::Result<()> {
     // clear the states of all axises each frame

crates/lyra-game/src/plugin.rs

@@ -4,6 +4,7 @@ use lyra_gltf::GltfLoader;
 use lyra_resource::ResourceManager;
 
 use crate::game::App;
+use crate::render::PreprocessShaderLoader;
 use crate::winit::{WinitPlugin, WindowPlugin};
 use crate::DeltaTimePlugin;
 use crate::input::InputPlugin;
@@ -101,7 +102,10 @@ pub struct ResourceManagerPlugin;
 
 impl Plugin for ResourceManagerPlugin {
     fn setup(&mut self, app: &mut App) {
-        app.world.add_resource(ResourceManager::new());
+        let rm = ResourceManager::new();
+        rm.register_loader::<PreprocessShaderLoader>();
+
+        app.world.add_resource(rm);
     }
 }
 
@@ -111,12 +115,12 @@ pub struct DefaultPlugins;
 
 impl Plugin for DefaultPlugins {
     fn setup(&mut self, app: &mut App) {
-        WinitPlugin::default().setup(app);
-        CommandQueuePlugin.setup(app);
-        InputPlugin.setup(app);
         ResourceManagerPlugin.setup(app);
         GltfPlugin.setup(app);
+        WinitPlugin::default().setup(app);
         WindowPlugin::default().setup(app);
+        CommandQueuePlugin.setup(app);
+        InputPlugin.setup(app);
         DeltaTimePlugin.setup(app);
     }
 }

crates/lyra-game/src/render/camera.rs

@@ -1,40 +1,7 @@
-use lyra_reflect::Reflect;
-use winit::dpi::PhysicalSize;
+use glam::Vec2;
+use lyra_math::Transform;
 
-use crate::{math::{Angle, OPENGL_TO_WGPU_MATRIX}, scene::CameraComponent};
-
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Reflect)]
-pub enum CameraProjectionMode {
-    /// 3d camera projection
-    Perspective,
-    /// 2d camera projection
-    Orthographic,
-}
-
-#[derive(Debug, Clone)]
-pub struct Projection {
-    aspect: f32,
-    znear: f32,
-    zfar: f32,
-}
-
-impl Projection {
-    pub fn new(width: u32, height: u32, znear: f32, zfar: f32) -> Self {
-        Self {
-            aspect: width as f32 / height as f32,
-            znear,
-            zfar,
-        }
-    }
-
-    pub fn resize(&mut self, width: u32, height: u32) {
-        self.aspect = width as f32 / height as f32;
-    }
-
-    pub fn calc_matrix(&self, fov: Angle, _mode: CameraProjectionMode) -> glam::Mat4 {
-        OPENGL_TO_WGPU_MATRIX * glam::Mat4::perspective_rh_gl(fov.to_radians(), self.aspect, self.znear, self.zfar)
-    }
-}
+use crate::scene::CameraProjection;
 
 #[repr(C)]
 #[derive(Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)]
@@ -48,9 +15,7 @@ pub struct CameraUniform {
     pub projection: glam::Mat4,
     /// The position of the camera
     pub position: glam::Vec3,
-    pub tile_debug: u32,
-    //_padding: [u8; 3],
-
+    _padding: u32,
 }
 
 impl Default for CameraUniform {
@@ -61,106 +26,45 @@ impl Default for CameraUniform {
             view_projection: glam::Mat4::IDENTITY,
             projection: glam::Mat4::IDENTITY,
             position: Default::default(),
-            tile_debug: 0,
-            //_padding: 0,
+            _padding: 0,
         }
     }
 }
 
 impl CameraUniform {
-    pub fn new(view: glam::Mat4, inverse_projection: glam::Mat4, view_projection: glam::Mat4, projection: glam::Mat4, position: glam::Vec3) -> Self {
+    pub fn new(
+        view: glam::Mat4,
+        inverse_projection: glam::Mat4,
+        view_projection: glam::Mat4,
+        projection: glam::Mat4,
+        position: glam::Vec3,
+    ) -> Self {
         Self {
             view,
             inverse_projection,
             view_projection,
             projection,
             position,
-            tile_debug: 0
-        }
+            _padding: 0,
         }
     }
 
-#[derive(Debug, Clone)]
-pub struct RenderCamera {
-    view_proj: glam::Mat4,
+    pub fn from_component(transform: Transform, projection: CameraProjection, viewport_size: Vec2) -> Self {
+        let position = transform.translation;
+        let forward = transform.forward();
+        let up = transform.up();
+        let view = glam::Mat4::look_to_rh(position, forward, up);
 
-    #[allow(dead_code)]
-    size: PhysicalSize<u32>,
-    aspect: f32,
-    znear: f32,
-    zfar: f32,
-}
+        let projection = projection.to_mat4(viewport_size);
+        let view_projection = projection * view;
 
-impl RenderCamera {
-    pub fn new(size: PhysicalSize<u32>) -> Self {
         Self {
-            view_proj: glam::Mat4::IDENTITY,
-
-            size,
-            aspect: size.width as f32 / size.height as f32,
-            znear: 0.1,
-            zfar: 100.0,
-        }
-    }
-
-    pub fn update_aspect_ratio(&mut self, size: PhysicalSize<u32>) {
-        self.aspect = size.width as f32 / size.height as f32;
-    }
-
-    /// Calculates the view projection, and the view
-    /// 
-    /// Returns: A tuple with the view projection as the first element, and the
-    /// view matrix as the second.
-    pub fn calc_view_projection(&mut self, camera: &CameraComponent) -> CameraUniform {
-        let position = camera.transform.translation;
-        let forward = camera.transform.forward();
-        let up = camera.transform.up();
-
-        let view = glam::Mat4::look_to_rh(
-            position,
-            forward,
-            up
-        );
-
-        match camera.mode {
-            CameraProjectionMode::Perspective => {
-                let proj = glam::Mat4::perspective_rh_gl(camera.fov.to_radians(), self.aspect, self.znear, self.zfar);
-
-                self.view_proj = OPENGL_TO_WGPU_MATRIX * proj * view;
-                //(&self.view_proj, view)
-
-                CameraUniform {
             view,
-                    inverse_projection: proj.inverse(),
-                    view_projection: self.view_proj,
-                    projection: proj,
+            inverse_projection: projection.inverse(),
+            view_projection,
+            projection,
             position,
-                    tile_debug: camera.debug as u32,
-                }
-            },
-            CameraProjectionMode::Orthographic => {
-                let target = camera.transform.rotation * glam::Vec3::new(0.0, 0.0, -1.0);
-                let target = target.normalize();
-
-                let ratio_size_per_depth = ((camera.fov.to_radians() / 2.0) * 2.0).atan();
-                let distance = (target - position).length();
-
-                let size_y = ratio_size_per_depth * distance;
-                let size_x = ratio_size_per_depth * distance * self.aspect;
-
-                let proj = glam::Mat4::orthographic_rh_gl(-size_x, size_x, -size_y, size_y, self.znear, self.zfar);
-
-                self.view_proj = OPENGL_TO_WGPU_MATRIX * proj;
-                
-                CameraUniform {
-                    view,
-                    inverse_projection: proj.inverse(),
-                    view_projection: self.view_proj,
-                    projection: proj,
-                    position,
-                    tile_debug: camera.debug as u32,
-                }
-            },
+            _padding: 0,
         }
     }
 }

crates/lyra-game/src/render/graph/mod.rs

@@ -4,6 +4,7 @@ use std::{
 };
 
 use lyra_ecs::World;
+use lyra_resource::{RequestError, ResHandle, ResourceManager};
 pub use node::*;
 
 mod passes;
@@ -20,9 +21,9 @@ pub use render_target::*;
 
 use rustc_hash::FxHashMap;
 use tracing::{debug_span, instrument, trace, warn};
-use wgpu::CommandEncoder;
+use wgpu::{util::DeviceExt, BufferUsages, CommandEncoder};
 
-use super::resource::{ComputePipeline, Pass, Pipeline, RenderPipeline};
+use super::{resource::{ComputePipeline, Pass, Pipeline, RenderPipeline}, Shader};
 
 /// A trait that represents the label of a resource, slot, or node in the [`RenderGraph`].
 pub trait RenderGraphLabel: Debug + 'static {
@@ -118,11 +119,15 @@ pub struct RenderGraph {
     /// A directed graph used to determine dependencies of nodes.
     node_graph: petgraph::matrix_graph::DiMatrix<RenderGraphLabelValue, (), Option<()>, usize>,
     view_target: Rc<RefCell<ViewTarget>>,
-    shader_prepoc: wgsl_preprocessor::Processor,
+    /// Type erased data of ResourceManager ecs resource
+    resource_manager: lyra_ecs::ResourceData,
 }
 
 impl RenderGraph {
-    pub fn new(device: Arc<wgpu::Device>, queue: Arc<wgpu::Queue>, view_target: Rc<RefCell<ViewTarget>>) -> Self {
+    pub fn new(device: Arc<wgpu::Device>, queue: Arc<wgpu::Queue>, view_target: Rc<RefCell<ViewTarget>>, world: &World) -> Self {
+        let rm = world.get_resource_data::<ResourceManager>()
+            .expect("RenderGraph requires ResourceManager ECS resource");
+
         Self {
             device,
             queue,
@@ -132,7 +137,7 @@ impl RenderGraph {
             bind_groups: Default::default(),
             node_graph: Default::default(),
             view_target,
-            shader_prepoc: wgsl_preprocessor::Processor::new(),
+            resource_manager: rm,
         }
     }
 
@@ -518,7 +523,7 @@ impl RenderGraph {
     /// This step also parses the shader and will return errors if it failed to parse.
     /// 
     /// Returns: The shader module import path if the module specified one.
-    #[inline(always)]
+    /* #[inline(always)]
     pub fn register_shader(&mut self, shader_src: &str) -> Result<Option<String>, wgsl_preprocessor::Error> {
         self.shader_prepoc.parse_module(shader_src)
     }
@@ -527,6 +532,25 @@ impl RenderGraph {
     #[inline(always)]
     pub fn preprocess_shader(&mut self, shader_path: &str) -> Result<String, wgsl_preprocessor::Error> {
         self.shader_prepoc.preprocess_module(shader_path)
+    } */
+
+    /// Load a shader from a `str`
+    /// 
+    /// This will also wait until the shader is loaded before returning.
+    pub fn load_shader_str(&self, shader_name: &str, shader_src: &str) -> Result<ResHandle<Shader>, RequestError> {
+        let rm = self.resource_manager.get::<ResourceManager>();
+        let shader = rm.load_str(shader_name, "text/wgsl", shader_src)?;
+        shader.wait_for_load()?;
+        Ok(shader)
+    }
+
+    /// Create a buffer with a single item inside of it
+    pub fn create_buffer_with_data<T: bytemuck::NoUninit>(&self, label: Option<&'static str>, usage: BufferUsages, data: &T) -> wgpu::Buffer {
+        self.device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
+            label,
+            usage,
+            contents: bytemuck::bytes_of(data),
+        })
     }
 }
 

crates/lyra-game/src/render/graph/passes/base.rs

@@ -2,18 +2,17 @@ use std::sync::Arc;
 
 use glam::UVec2;
 use lyra_game_derive::RenderGraphLabel;
+use lyra_math::Transform;
 use tracing::warn;
-use winit::dpi::PhysicalSize;
 
 use crate::{
     render::{
-        camera::{CameraUniform, RenderCamera},
+        camera::CameraUniform,
         graph::{
             Node, NodeDesc, NodeType, RenderGraph, RenderGraphContext, SlotAttribute, SlotValue
         },
         render_buffer::BufferWrapper, texture::RenderTexture,
-    },
-    scene::CameraComponent,
+    }, scene::{Camera, CameraProjection},
 };
 
 #[derive(Debug, Hash, Clone, Default, PartialEq, RenderGraphLabel)]
@@ -114,15 +113,20 @@ impl Node for BasePass {
     }
 
     fn prepare(&mut self, graph: &mut RenderGraph, world: &mut lyra_ecs::World, context: &mut RenderGraphContext) {
-        if let Some(camera) = world.view_iter::<&mut CameraComponent>().next() {
+        let mut found_camera = false;
+
+        for (camera, projection, transform) in world.view_iter::<(&Camera, &CameraProjection, &Transform)>() {
+            if camera.is_active {
                 let screen_size = graph.view_target().size();
+                let uniform = CameraUniform::from_component(*transform, *projection, screen_size.as_vec2());
+                context.queue_buffer_write_with(BasePassSlots::Camera, 0, uniform);
 
-            let mut render_cam =
-                RenderCamera::new(PhysicalSize::new(screen_size.x, screen_size.y));
-            let uniform = render_cam.calc_view_projection(&camera);
+                found_camera = true;
+                break;
+            }
+        }
 
-            context.queue_buffer_write_with(BasePassSlots::Camera, 0, uniform)
-        } else {
+        if !found_camera {
             warn!("Missing camera!");
         }
     }

crates/lyra-game/src/render/graph/passes/fxaa.rs

@@ -1,10 +1,10 @@
-use std::{collections::HashMap, rc::Rc, sync::Arc};
+use std::{collections::HashMap, sync::Arc};
 
 use lyra_game_derive::RenderGraphLabel;
 
 use crate::render::{
     graph::{Node, NodeDesc, NodeType},
-    resource::{FragmentState, PipelineDescriptor, RenderPipelineDescriptor, Shader, VertexState},
+    resource::{FragmentState, PipelineDescriptor, RenderPipelineDescriptor, VertexState},
 };
 
 #[derive(Default, Debug, Clone, Copy, Hash, RenderGraphLabel)]
@@ -64,10 +64,8 @@ impl Node for FxaaPass {
             ..Default::default()
         }));
 
-        let shader = Rc::new(Shader {
-            label: Some("fxaa_shader".into()),
-            source: include_str!("../../shaders/fxaa.wgsl").to_string(),
-        });
+        let shader = graph.load_shader_str("fxaa_shader", include_str!("../../shaders/fxaa.wgsl"))
+            .expect("failed to load wgsl shader from manager");
 
         let vt = graph.view_target();
         

crates/lyra-game/src/render/graph/passes/light_cull_compute.rs

@@ -1,4 +1,4 @@
-use std::{mem, rc::Rc, sync::Arc};
+use std::{mem, sync::Arc};
 
 use glam::Vec2Swizzles;
 use lyra_ecs::World;
@@ -8,7 +8,7 @@ use wgpu::util::DeviceExt;
 use crate::render::{
     graph::{
         Node, NodeDesc, NodeType, RenderGraph, RenderGraphContext, SlotAttribute, SlotValue
-    }, renderer::ScreenSize, resource::{ComputePipeline, ComputePipelineDescriptor, Shader}
+    }, renderer::ScreenSize, resource::{ComputePipeline, ComputePipelineDescriptor}
 };
 
 use super::{BasePassSlots, LightBasePassSlots};
@@ -219,10 +219,8 @@ impl Node for LightCullComputePass {
             let screen_size_bgl = graph.bind_group_layout(BasePassSlots::ScreenSize);
             let light_indices_bg_layout = graph.bind_group_layout(LightCullComputePassSlots::LightIndicesGridGroup);
 
-            let shader = Rc::new(Shader {
-                label: Some("light_cull_comp_shader".into()),
-                source: include_str!("../../shaders/light_cull.comp.wgsl").to_string(),
-            });
+            let shader = graph.load_shader_str("light_cull_comp_shader", include_str!("../../shaders/light_cull.comp.wgsl"))
+                .expect("failed to load light cull compute shader");
 
             let pipeline = ComputePipeline::create(device, &ComputePipelineDescriptor {
                 label: Some("light_cull_pipeline".into()),

crates/lyra-game/src/render/graph/passes/meshes.rs

@@ -1,4 +1,4 @@
-use std::{rc::Rc, sync::Arc};
+use std::sync::Arc;
 
 use lyra_ecs::{AtomicRef, ResourceData};
 use lyra_game_derive::RenderGraphLabel;
@@ -7,7 +7,7 @@ use tracing::{instrument, warn};
 use crate::render::{
     desc_buf_lay::DescVertexBufferLayout,
     graph::{Node, NodeDesc, NodeType, RenderGraph, RenderGraphContext},
-    resource::{FragmentState, RenderPipeline, RenderPipelineDescriptor, Shader, VertexState},
+    resource::{FragmentState, RenderPipeline, RenderPipelineDescriptor, VertexState},
     texture::RenderTexture,
     transform_buffer_storage::TransformBuffers,
     vertex::Vertex,
@@ -102,10 +102,8 @@ impl Node for MeshPass {
         _: &mut RenderGraphContext,
     ) {
         if self.pipeline.is_none() {
-            let shader_mod = graph.register_shader(include_str!("../../shaders/base.wgsl"))
-                .expect("failed to register shader").expect("base shader missing module");
-            let shader_src = graph.preprocess_shader(&shader_mod)
-                .expect("failed to preprocess shader");
+            let shader = graph.load_shader_str("mesh_base", include_str!("../../shaders/base.wgsl"))
+                .expect("failed to load base mesh shader");
 
             let device = graph.device();
             let surface_config_format = graph.view_target().format();
@@ -299,11 +297,6 @@ impl Node for MeshPass {
                 graph.bind_group_layout(LightCullComputePassSlots::LightIndicesGridGroup);
             let atlas_bgl = self.shadows_atlas.as_ref().unwrap().layout.clone();
 
-            let shader = Rc::new(Shader {
-                label: Some(shader_mod.into()),
-                source: shader_src,
-            });
-
             let transforms = world
                 .get_resource_data::<TransformBuffers>()
                 .expect("Missing transform buffers");
@@ -414,12 +407,12 @@ impl Node for MeshPass {
                     view,
                     resolve_target: None,
                     ops: wgpu::Operations {
-                        load: wgpu::LoadOp::Clear(wgpu::Color {
+                        load: wgpu::LoadOp::Load,/* wgpu::LoadOp::Clear(wgpu::Color {
                             r: 0.1,
                             g: 0.2,
                             b: 0.3,
                             a: 1.0,
-                        }),
+                        }), */
                         store: wgpu::StoreOp::Store,
                     },
                 })],
@@ -441,9 +434,9 @@ impl Node for MeshPass {
 
             for job in render_meshes.iter() {
                 // get the mesh (containing vertices) and the buffers from storage
-                let buffers = mesh_buffers.get(&job.mesh_uuid);
+                let buffers = mesh_buffers.get(&job.asset_uuid);
                 if buffers.is_none() {
-                    warn!("Skipping job since its mesh is missing {:?}", job.mesh_uuid);
+                    warn!("Skipping job since its mesh is missing {:?}", job.asset_uuid);
                     continue;
                 }
                 let buffers = buffers.unwrap();

crates/lyra-game/src/render/graph/passes/mod.rs

@@ -30,3 +30,6 @@ pub use mesh_prepare::*;
 
 mod transform;
 pub use transform::*;
+
+mod sprite;
+pub use sprite::*;

crates/lyra-game/src/render/graph/passes/shadows.rs

@@ -14,17 +14,13 @@ use lyra_ecs::{
 };
 use lyra_game_derive::RenderGraphLabel;
 use lyra_math::{Angle, Transform};
+use lyra_resource::{RequestError, ResHandle};
 use rustc_hash::FxHashMap;
 use tracing::{debug, warn};
 use wgpu::util::DeviceExt;
 
 use crate::render::{
-    graph::{Node, NodeDesc, NodeType, RenderGraph, SlotAttribute, SlotValue},
-    light::{directional::DirectionalLight, LightType, PointLight, SpotLight},
-    resource::{FragmentState, RenderPipeline, RenderPipelineDescriptor, Shader, VertexState},
-    transform_buffer_storage::TransformBuffers,
-    vertex::Vertex,
-    AtlasFrame, GpuSlotBuffer, TextureAtlas,
+    graph::{Node, NodeDesc, NodeType, RenderGraph, SlotAttribute, SlotValue}, light::{directional::DirectionalLight, LightType, PointLight, SpotLight}, resource::{FragmentState, RenderPipeline, RenderPipelineDescriptor, VertexState}, transform_buffer_storage::TransformBuffers, vertex::Vertex, AtlasFrame, GpuSlotBuffer, Shader, PackedTextureAtlas
 };
 
 use super::{MeshBufferStorage, RenderAssets, RenderMeshes};
@@ -74,7 +70,7 @@ pub struct ShadowMapsPass {
     transform_buffers: Option<ResourceData>,
     render_meshes: Option<ResourceData>,
     mesh_buffers: Option<ResourceData>,
-    shader: Option<String>,
+    shader: ResHandle<Shader>,
     pipeline: Option<RenderPipeline>,
     point_light_pipeline: Option<RenderPipeline>,
 
@@ -102,7 +98,7 @@ impl ShadowMapsPass {
             }),
         );
 
-        let atlas = TextureAtlas::new(
+        let atlas = PackedTextureAtlas::new(
             device,
             wgpu::TextureFormat::Depth32Float,
             wgpu::TextureUsages::RENDER_ATTACHMENT | wgpu::TextureUsages::TEXTURE_BINDING,
@@ -171,7 +167,7 @@ impl ShadowMapsPass {
             transform_buffers: None,
             render_meshes: None,
             mesh_buffers: None,
-            shader: None,
+            shader: Default::default(),
             pipeline: None,
             point_light_pipeline: None,
 
@@ -503,21 +499,14 @@ impl ShadowMapsPass {
         queue.write_buffer(buffer, 0, bytemuck::cast_slice(points.as_slice()));
     }
 
-    /// Register all the shaders, returning the module of the 
-    fn register_shaders(&self, graph: &mut RenderGraph) -> Result<(), wgsl_preprocessor::Error> {
-        let src = include_str!("../../shaders/shadows/shadows_structs.wgsl");
-        graph.register_shader(src)?;
+    /// Load all shadow related registers and return the shader for the shadow depth pass.
+    fn loader_shaders(&self, graph: &mut RenderGraph) -> Result<ResHandle<Shader>, RequestError> {
+        graph.load_shader_str("shadows_structs", include_str!("../../shaders/shadows/shadows_structs.wgsl"))?;
+        graph.load_shader_str("shadows_bindings", include_str!("../../shaders/shadows/shadows_bindings.wgsl"))?;
+        graph.load_shader_str("shadows_calc", include_str!("../../shaders/shadows/shadows_calc.wgsl"))?;
+        let depth = graph.load_shader_str("shadows_depth", include_str!("../../shaders/shadows/shadows_depth.wgsl"))?;
 
-        let src = include_str!("../../shaders/shadows/shadows_bindings.wgsl");
-        graph.register_shader(src)?;
-
-        let src = include_str!("../../shaders/shadows/shadows_calc.wgsl");
-        graph.register_shader(src)?;
-
-        let src = include_str!("../../shaders/shadows/shadows_depth.wgsl");
-        graph.register_shader(src)?;
-
-        Ok(())
+        Ok(depth)
     }
 }
 
@@ -526,11 +515,8 @@ impl Node for ShadowMapsPass {
         &mut self,
         graph: &mut crate::render::graph::RenderGraph,
     ) -> crate::render::graph::NodeDesc {
-        self.register_shaders(graph)
-            .expect("failed to register shaders");
-        self.shader = Some(graph.preprocess_shader("lyra::shadows::depth_pass")
-            .expect("failed to preprocess depth shadow shaders"));
-        println!("{}", self.shader.as_ref().unwrap());
+        self.shader = self.loader_shaders(graph)
+            .expect("failed to load depth shadow shader");
 
         let mut node = NodeDesc::new(NodeType::Render, None, vec![]);
 
@@ -773,11 +759,6 @@ impl Node for ShadowMapsPass {
         }
 
         if self.pipeline.is_none() {
-            let shader = Rc::new(Shader {
-                label: Some("lyra::shadows::depth_pass".into()),
-                source: self.shader.clone().unwrap(),
-            });
-
             let bgl = self.bgl.clone();
             let transforms = self.transform_buffers().bindgroup_layout.clone();
 
@@ -788,7 +769,7 @@ impl Node for ShadowMapsPass {
                     layouts: vec![bgl.clone(), transforms.clone()],
                     push_constant_ranges: vec![],
                     vertex: VertexState {
-                        module: shader.clone(),
+                        module: self.shader.clone(),
                         entry_point: "vs_main".into(),
                         buffers: vec![Vertex::position_desc().into()],
                     },
@@ -817,12 +798,12 @@ impl Node for ShadowMapsPass {
                     layouts: vec![bgl, transforms],
                     push_constant_ranges: vec![],
                     vertex: VertexState {
-                        module: shader.clone(),
+                        module: self.shader.clone(),
                         entry_point: "vs_main".into(),
                         buffers: vec![Vertex::position_desc().into()],
                     },
                     fragment: Some(FragmentState {
-                        module: shader,
+                        module: self.shader.clone(),
                         entry_point: "fs_point_light_main".into(),
                         targets: vec![],
                     }),
@@ -963,9 +944,9 @@ fn light_shadow_pass_impl<'a>(
 
     for job in render_meshes.iter() {
         // get the mesh (containing vertices) and the buffers from storage
-        let buffers = mesh_buffers.get(&job.mesh_uuid);
+        let buffers = mesh_buffers.get(&job.asset_uuid);
         if buffers.is_none() {
-            warn!("Skipping job since its mesh is missing {:?}", job.mesh_uuid);
+            warn!("Skipping job since its mesh is missing {:?}", job.asset_uuid);
             continue;
         }
         let buffers = buffers.unwrap();
@@ -1081,14 +1062,14 @@ impl LightShadowMapId {
 
 /// An ecs resource storing the [`TextureAtlas`] of shadow maps.
 #[derive(Clone)]
-pub struct LightShadowMapAtlas(Arc<RwLock<TextureAtlas>>);
+pub struct LightShadowMapAtlas(Arc<RwLock<PackedTextureAtlas>>);
 
 impl LightShadowMapAtlas {
-    pub fn get(&self) -> RwLockReadGuard<TextureAtlas> {
+    pub fn get(&self) -> RwLockReadGuard<PackedTextureAtlas> {
         self.0.read().unwrap()
     }
 
-    pub fn get_mut(&self) -> RwLockWriteGuard<TextureAtlas> {
+    pub fn get_mut(&self) -> RwLockWriteGuard<PackedTextureAtlas> {
         self.0.write().unwrap()
     }
 }

crates/lyra-game/src/render/graph/passes/sprite.rs

@@ -0,0 +1,491 @@
+use std::{collections::VecDeque, sync::Arc};
+
+use glam::{UVec2, Vec2, Vec3};
+use image::GenericImageView;
+use lyra_ecs::{
+    query::{filter::Or, Entities, ResMut, TickOf}, AtomicRef, Entity, ResourceData
+};
+use lyra_game_derive::RenderGraphLabel;
+use lyra_math::URect;
+use lyra_resource::Image;
+use rustc_hash::FxHashMap;
+use tracing::{debug, instrument, warn};
+use uuid::Uuid;
+use wgpu::util::DeviceExt;
+
+use crate::{
+    render::{
+        graph::{Node, NodeDesc, NodeType, SlotAttribute},
+        resource::{FragmentState, RenderPipeline, RenderPipelineDescriptor, VertexState},
+        transform_buffer_storage::{TransformBuffers, TransformIndex},
+        vertex::Vertex2D,
+    },
+    sprite::{AtlasSprite, Sprite},
+};
+
+use super::{BasePassSlots, RenderAssets};
+
+#[derive(Clone)]
+pub struct RenderJob {
+    pub entity: Entity,
+    pub shader_id: u64,
+    pub asset_uuid: uuid::Uuid,
+    pub transform_id: TransformIndex,
+    pub atlas_frame_id: u64,
+}
+
+#[derive(Default, Debug, Clone, Copy, Hash, RenderGraphLabel)]
+pub struct SpritePassLabel;
+
+#[derive(Debug, Hash, Clone, PartialEq, RenderGraphLabel)]
+pub enum SpritePassSlots {
+    SpriteTexture,
+    SpriteTextureView,
+    SpriteTextureSampler,
+}
+
+struct SpriteTexture {
+    // this field is actually read, its given to the bind group
+    #[allow(dead_code)]
+    texture: wgpu::Texture,
+    // this field is actually read, its given to the bind group
+    #[allow(dead_code)]
+    sampler: wgpu::Sampler,
+    texture_bg: Arc<wgpu::BindGroup>,
+}
+
+struct SpriteBuffers {
+    vertex_buffers: wgpu::Buffer,
+    index_buffers: wgpu::Buffer,
+}
+
+#[derive(Default)]
+pub struct SpritePass {
+    pipeline: Option<RenderPipeline>,
+    texture_bgl: Option<Arc<wgpu::BindGroupLayout>>,
+    jobs: VecDeque<RenderJob>,
+    /// Buffer that stores a `Rect` with `min` and `max` set to zero.
+    /// This can be used for sprites that are not from an atlas.
+    atlas_frames_buf: Option<Arc<wgpu::Buffer>>,
+
+    transform_buffers: Option<ResourceData>,
+    texture_store: Option<ResourceData>,
+    buffer_store: Option<ResourceData>,
+}
+
+impl SpritePass {
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    #[instrument(skip(self, device))]
+    fn create_vertex_index_buffers(
+        &mut self,
+        device: &wgpu::Device,
+        dimensions: UVec2,
+    ) -> (wgpu::Buffer, wgpu::Buffer) {
+        let vertices = vec![
+            // top left
+            Vertex2D::new(Vec3::new(0.0, 0.0, 0.0), Vec2::new(0.0, 1.0)),
+            // bottom left
+            Vertex2D::new(Vec3::new(0.0, dimensions.y as f32, 0.0), Vec2::new(0.0, 0.0)),
+            // top right
+            Vertex2D::new(Vec3::new(dimensions.x as f32, 0.0, 0.0), Vec2::new(1.0, 1.0)),
+            // bottom right
+            Vertex2D::new(
+                Vec3::new(dimensions.x as f32, dimensions.y as f32, 0.0),
+                Vec2::new(1.0, 0.0),
+            ),
+        ];
+
+        let vertex_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
+            label: Some("Vertex Buffer"),
+            contents: bytemuck::cast_slice(vertices.as_slice()),
+            usage: wgpu::BufferUsages::VERTEX | wgpu::BufferUsages::COPY_DST,
+        });
+
+        let contents: [u32; 6] = [
+            //3, 1, 0,
+            //0, 2, 3
+            3, 1, 0, // second tri
+            0, 2, 3, // first tri
+               //0, 2, 3, // second tri
+        ];
+        let index_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
+            label: Some("Index Buffer"),
+            contents: bytemuck::cast_slice(&contents),
+            usage: wgpu::BufferUsages::INDEX | wgpu::BufferUsages::COPY_DST,
+        });
+
+        (vertex_buffer, index_buffer)
+    }
+
+    fn load_sprite_texture(
+        &self,
+        device: &wgpu::Device,
+        queue: &wgpu::Queue,
+        uuid: &Uuid,
+        image: &Image,
+    ) -> Option<(wgpu::Texture, wgpu::Sampler, wgpu::BindGroup)> {
+        let uuid_str = uuid.to_string();
+        let image_dim = image.dimensions();
+        let tex = device.create_texture(&wgpu::TextureDescriptor {
+            label: Some(&format!("sprite_texture_{}", uuid_str)),
+            size: wgpu::Extent3d {
+                width: image_dim.0,
+                height: image_dim.1,
+                depth_or_array_layers: 1,
+            },
+            mip_level_count: 1, // TODO
+            sample_count: 1,
+            dimension: wgpu::TextureDimension::D2,
+            format: wgpu::TextureFormat::Rgba8UnormSrgb,
+            usage: wgpu::TextureUsages::TEXTURE_BINDING | wgpu::TextureUsages::COPY_DST,
+            view_formats: &[],
+        });
+        let tex_view = tex.create_view(&wgpu::TextureViewDescriptor::default());
+
+        let sampler = device.create_sampler(&wgpu::SamplerDescriptor {
+            address_mode_u: wgpu::AddressMode::ClampToEdge,
+            address_mode_v: wgpu::AddressMode::ClampToEdge,
+            address_mode_w: wgpu::AddressMode::ClampToEdge,
+            mag_filter: wgpu::FilterMode::Nearest,
+            min_filter: wgpu::FilterMode::Nearest,
+            mipmap_filter: wgpu::FilterMode::Nearest,
+            ..Default::default()
+        });
+
+        queue.write_texture(
+            wgpu::ImageCopyTexture {
+                aspect: wgpu::TextureAspect::All,
+                texture: &tex,
+                mip_level: 0,
+                origin: wgpu::Origin3d::ZERO,
+            },
+            &image.to_rgba8(),
+            wgpu::ImageDataLayout {
+                offset: 0,
+                bytes_per_row: Some(4 * image_dim.0),
+                rows_per_image: Some(image_dim.1),
+            },
+            wgpu::Extent3d {
+                width: image_dim.0,
+                height: image_dim.1,
+                depth_or_array_layers: 1,
+            },
+        );
+
+        let frames = self.atlas_frames_buf.as_ref().unwrap();
+        let bgl = self.texture_bgl.as_ref().unwrap();
+        let tex_bg = device.create_bind_group(&wgpu::BindGroupDescriptor {
+            label: Some(&format!("sprite_texture_bg_{}", uuid_str)),
+            layout: bgl,
+            entries: &[
+                wgpu::BindGroupEntry {
+                    binding: 0,
+                    resource: wgpu::BindingResource::TextureView(&tex_view),
+                },
+                wgpu::BindGroupEntry {
+                    binding: 1,
+                    resource: wgpu::BindingResource::Sampler(&sampler),
+                },
+                wgpu::BindGroupEntry {
+                    binding: 2,
+                    resource: wgpu::BindingResource::Buffer(wgpu::BufferBinding {
+                        buffer: &frames,
+                        offset: 0,
+                        size: None,
+                    }),
+                },
+            ],
+        });
+
+        Some((tex, sampler, tex_bg))
+    }
+}
+
+impl Node for SpritePass {
+    fn desc(
+        &mut self,
+        graph: &mut crate::render::graph::RenderGraph,
+    ) -> crate::render::graph::NodeDesc {
+        let device = &graph.device;
+
+        let atlas_frames = device.create_buffer(&wgpu::BufferDescriptor {
+            label: Some("default_sprite_atlas_frame"),
+            size: std::mem::size_of::<URect>() as u64 * 1000,
+            usage: wgpu::BufferUsages::STORAGE | wgpu::BufferUsages::COPY_DST,
+            mapped_at_creation: false,
+        });
+        // write the rect for sprites that aren't part of the texture atlas.
+        graph
+            .queue
+            .write_buffer(&atlas_frames, 0, bytemuck::bytes_of(&URect::ZERO));
+
+        let bgl = device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
+            label: Some("bgl_sprite_main"),
+            entries: &[
+                wgpu::BindGroupLayoutEntry {
+                    binding: 0,
+                    visibility: wgpu::ShaderStages::FRAGMENT,
+                    ty: wgpu::BindingType::Texture {
+                        sample_type: wgpu::TextureSampleType::Float { filterable: true },
+                        view_dimension: wgpu::TextureViewDimension::D2,
+                        multisampled: false,
+                    },
+                    count: None,
+                },
+                wgpu::BindGroupLayoutEntry {
+                    binding: 1,
+                    visibility: wgpu::ShaderStages::FRAGMENT,
+                    ty: wgpu::BindingType::Sampler(wgpu::SamplerBindingType::Filtering),
+                    count: None,
+                },
+                wgpu::BindGroupLayoutEntry {
+                    binding: 2,
+                    visibility: wgpu::ShaderStages::FRAGMENT,
+                    ty: wgpu::BindingType::Buffer {
+                        ty: wgpu::BufferBindingType::Storage { read_only: true },
+                        has_dynamic_offset: false,
+                        min_binding_size: None,
+                    },
+                    count: None,
+                },
+            ],
+        });
+        self.texture_bgl = Some(Arc::new(bgl));
+        self.atlas_frames_buf = Some(Arc::new(atlas_frames));
+
+        let mut desc = NodeDesc::new(NodeType::Render, None, vec![]);
+
+        desc.add_buffer_slot(BasePassSlots::Camera, SlotAttribute::Input, None);
+
+        desc
+    }
+
+    fn prepare(
+        &mut self,
+        graph: &mut crate::render::graph::RenderGraph,
+        world: &mut lyra_ecs::World,
+        _: &mut crate::render::graph::RenderGraphContext,
+    ) {
+        let device = graph.device();
+        let vt = graph.view_target();
+
+        if self.pipeline.is_none() {
+            let shader = graph
+                .load_shader_str(
+                    "sprite_shader",
+                    include_str!("../../shaders/2d/sprite_main.wgsl"),
+                )
+                .expect("failed to load wgsl shader from manager");
+
+            let diffuse_bgl = self.texture_bgl.clone().unwrap();
+            let camera_bgl = graph.bind_group_layout(BasePassSlots::Camera).clone();
+            let transforms = world
+                .get_resource::<TransformBuffers>()
+                .expect("Missing transform buffers");
+            let transform_bgl = transforms.bindgroup_layout.clone();
+
+            self.pipeline = Some(RenderPipeline::create(
+                device,
+                &RenderPipelineDescriptor {
+                    label: Some("sprite_pass".into()),
+                    layouts: vec![diffuse_bgl, transform_bgl, camera_bgl],
+                    push_constant_ranges: vec![],
+                    vertex: VertexState {
+                        module: shader.clone(),
+                        entry_point: "vs_main".into(),
+                        buffers: vec![Vertex2D::desc().into()],
+                    },
+                    fragment: Some(FragmentState {
+                        module: shader,
+                        entry_point: "fs_main".into(),
+                        targets: vec![Some(wgpu::ColorTargetState {
+                            format: vt.format(),
+                            blend: Some(wgpu::BlendState::REPLACE),
+                            write_mask: wgpu::ColorWrites::ALL,
+                        })],
+                    }),
+                    depth_stencil: None,
+                    primitive: wgpu::PrimitiveState {
+                        cull_mode: Some(wgpu::Face::Back),
+                        ..Default::default()
+                    },
+                    multisample: wgpu::MultisampleState::default(),
+                    multiview: None,
+                },
+            ));
+
+            drop(transforms);
+            world.add_resource_default_if_absent::<RenderAssets<SpriteTexture>>();
+            let texture_store = world
+                .get_resource_data::<RenderAssets<SpriteTexture>>().unwrap();
+            self.texture_store = Some(texture_store.clone());
+
+            world.add_resource_default_if_absent::<FxHashMap<Entity, SpriteBuffers>>();
+            let buffer_store = world
+                .get_resource_data::<FxHashMap<Entity, SpriteBuffers>>().unwrap();
+            self.buffer_store = Some(buffer_store.clone());
+
+            let transforms = world
+                .get_resource_data::<TransformBuffers>()
+                .expect("Missing transform buffers");
+            self.transform_buffers = Some(transforms.clone());
+        }
+
+        let mut v = Vec::with_capacity(500);
+
+        let world_tick = world.current_tick();
+        let queue = &graph.queue;
+        for (entity, (sprite, atlas_sprite), transform_idx, mut texture_store, mut buffer_store) in world
+            .view::<(
+                Entities,
+                Or<&Sprite, (&AtlasSprite, TickOf<AtlasSprite>)>,
+                &TransformIndex,
+                ResMut<RenderAssets<SpriteTexture>>,
+                ResMut<FxHashMap<Entity, SpriteBuffers>>,
+            )>()
+            .iter()
+        {
+            let tex = if let Some(sprite) = &sprite {
+                sprite.texture.clone()//.data_ref()
+            } else if let Some((a, _)) = &atlas_sprite {
+                a.atlas.data_ref()
+                    .unwrap().texture.clone()
+            } else { continue; };
+            let rect = atlas_sprite.as_ref().map(|(a, _)| a.sprite);
+
+            if let Some(image) = tex.data_ref() {
+                let texture_uuid = tex.uuid();
+                if !texture_store.contains_key(&texture_uuid) {
+                    // returns `None` if the Texture image is not loaded.
+                    if let Some((texture, sampler, tex_bg)) =
+                        self.load_sprite_texture(device, queue, &texture_uuid, &image)
+                    {
+                        texture_store.insert(
+                            texture_uuid,
+                            SpriteTexture {
+                                texture,
+                                sampler,
+                                texture_bg: Arc::new(tex_bg),
+                            },
+                        );
+                    }
+                }
+
+                if !buffer_store.contains_key(&entity) {
+                    let dim = rect.unwrap_or_else(|| {
+                        let i = image.dimensions();
+                        URect::new(0, 0, i.0, i.1)
+                    });
+                    debug!("storing rect: {dim:?}");
+                    let dim = dim.dimensions();
+                    let (vertex, index) = self.create_vertex_index_buffers(device, dim);
+                    buffer_store.insert(entity, SpriteBuffers { vertex_buffers: vertex, index_buffers: index });
+                } else if let Some((ats, tick)) = &atlas_sprite {
+                    // detect a change for the vertex and index buffers of the sprite
+                    if tick.checked_sub(1).unwrap_or(0) >= *world_tick {
+                        debug!("Updating buffer for entity after change detected in atlas sprite");
+                        let dim = ats.sprite.dimensions();
+                        let (vertex, index) = self.create_vertex_index_buffers(device, dim);
+                        buffer_store.insert(entity, SpriteBuffers { vertex_buffers: vertex, index_buffers: index });
+                    }
+                }
+
+                let frame_id = match rect {
+                    Some(r) => {
+                        v.push(r);
+                        // No -1 here since the gpu buffer is already offset by 1
+                        // to store the default rect at the front
+                        v.len() as u64
+                    }
+                    None => 0
+                };
+
+                self.jobs.push_back(RenderJob {
+                    entity,
+                    shader_id: 0,
+                    asset_uuid: texture_uuid,
+                    transform_id: *transform_idx,
+                    atlas_frame_id: frame_id,
+                });
+            };
+        }
+
+        let buf = self.atlas_frames_buf.as_ref().unwrap();
+        // skip default rect
+        queue.write_buffer(buf, std::mem::size_of::<URect>() as _, bytemuck::cast_slice(&v));
+    }
+
+    fn execute(
+        &mut self,
+        graph: &mut crate::render::graph::RenderGraph,
+        _: &crate::render::graph::NodeDesc,
+        context: &mut crate::render::graph::RenderGraphContext,
+    ) {
+        let pipeline = self.pipeline.as_ref().unwrap();
+
+        let texture_store = self.texture_store.clone().unwrap();
+        let texture_store: AtomicRef<RenderAssets<SpriteTexture>> = texture_store.get();
+        let buffer_store = self.buffer_store.clone().unwrap();
+        let buffer_store: AtomicRef<FxHashMap<Entity, SpriteBuffers>> = buffer_store.get();
+        let transforms = self.transform_buffers.clone().unwrap();
+        let transforms: AtomicRef<TransformBuffers> = transforms.get();
+
+        let vt = graph.view_target();
+        let view = vt.render_view();
+
+        let camera_bg = graph.bind_group(BasePassSlots::Camera);
+
+        {
+            let encoder = context.encoder.as_mut().unwrap();
+            let mut pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
+                label: Some("sprite_pass"),
+                color_attachments: &[Some(wgpu::RenderPassColorAttachment {
+                    view,
+                    resolve_target: None,
+                    ops: wgpu::Operations {
+                        load: wgpu::LoadOp::Clear(wgpu::Color {
+                            r: 0.1,
+                            g: 0.2,
+                            b: 0.3,
+                            a: 1.0,
+                        }),
+                        store: wgpu::StoreOp::Store,
+                    },
+                })],
+                depth_stencil_attachment: None,
+                timestamp_writes: None,
+                occlusion_query_set: None,
+            });
+            pass.set_pipeline(pipeline);
+
+            while let Some(job) = self.jobs.pop_front() {
+                // bind texture
+                let tex = texture_store
+                    .get(&job.asset_uuid)
+                    .expect("failed to find SpriteTexture for job asset_uuid");
+                pass.set_bind_group(0, &tex.texture_bg, &[]);
+
+                // Get the bindgroup for job's transform and bind to it using an offset.
+                let bindgroup = transforms.bind_group(job.transform_id);
+                let offset = transforms.buffer_offset(job.transform_id);
+                pass.set_bind_group(1, bindgroup, &[offset]);
+
+                pass.set_bind_group(2, camera_bg, &[]);
+
+                // set vertex and index buffers
+                let bufs = buffer_store
+                    .get(&job.entity)
+                    .expect("failed to find buffers for job entity");
+                pass.set_vertex_buffer(0, bufs.vertex_buffers.slice(..));
+                pass.set_index_buffer(bufs.index_buffers.slice(..), wgpu::IndexFormat::Uint32);
+
+                // use the atlas frame id as the instance
+                let inst = job.atlas_frame_id as u32;
+                pass.draw_indexed(0..6, 0, inst..inst + 1);
+            }
+        }
+    }
+}

crates/lyra-game/src/render/graph/passes/tint.rs

@@ -1,10 +1,10 @@
-use std::{collections::HashMap, rc::Rc, sync::Arc};
+use std::{collections::HashMap, sync::Arc};
 
 use lyra_game_derive::RenderGraphLabel;
 
 use crate::render::{
     graph::{Node, NodeDesc, NodeType},
-    resource::{FragmentState, PipelineDescriptor, RenderPipelineDescriptor, Shader, VertexState},
+    resource::{FragmentState, PipelineDescriptor, RenderPipelineDescriptor, VertexState},
 };
 
 #[derive(Default, Debug, Clone, Copy, Hash, RenderGraphLabel)]
@@ -58,13 +58,9 @@ impl Node for TintPass {
         self.bgl = Some(bgl.clone());
         self.target_sampler = Some(device.create_sampler(&wgpu::SamplerDescriptor::default()));
 
-        let shader = Rc::new(Shader {
-            label: Some("tint_shader".into()),
-            source: include_str!("../../shaders/tint.wgsl").to_string(),
-        });
-
         let vt = graph.view_target();
-        
+        let shader = graph.load_shader_str("tint_shader", include_str!("../../shaders/tint.wgsl"))
+            .expect("failed to load tint shader");
 
         NodeDesc::new(
             NodeType::Render,

crates/lyra-game/src/render/graph/passes/transform.rs

@@ -32,12 +32,12 @@ pub struct InterpTransform {
 #[derive(Default, Debug, Clone, Copy, Hash, RenderGraphLabel)]
 pub struct TransformsNodeLabel;
 
-#[derive(Debug)]
-pub struct TransformsNode {}
+#[derive(Debug, Default)]
+pub struct TransformsNode;
 
 impl TransformsNode {
     pub fn new() -> Self {
-        Self {}
+        Self
     }
 }
 

crates/lyra-game/src/render/mod.rs

@@ -6,7 +6,6 @@ pub mod render_buffer;
 pub mod render_job;
 pub mod mesh;
 pub mod texture;
-pub mod shader_loader;
 pub mod material;
 pub mod camera;
 pub mod transform_buffer_storage;
@@ -20,3 +19,6 @@ pub use texture_atlas::*;
 
 mod slot_buffer;
 pub use slot_buffer::*;
+
+mod shader_loader;
+pub use shader_loader::*;

crates/lyra-game/src/render/render_job.rs

@@ -5,7 +5,7 @@ use super::transform_buffer_storage::TransformIndex;
 pub struct RenderJob {
     pub entity: Entity,
     pub shader_id: u64,
-    pub mesh_uuid: uuid::Uuid,
+    pub asset_uuid: uuid::Uuid,
     pub transform_id: TransformIndex,
 }
 
@@ -14,7 +14,7 @@ impl RenderJob {
         Self {
             entity,
             shader_id,
-            mesh_uuid: mesh_buffer_id,
+            asset_uuid: mesh_buffer_id,
             transform_id
         }
     }

crates/lyra-game/src/render/renderer.rs

@@ -9,7 +9,7 @@ use lyra_game_derive::RenderGraphLabel;
 use tracing::{debug, instrument, warn};
 use winit::window::Window;
 
-use crate::render::graph::{BasePass, BasePassLabel, BasePassSlots, FxaaPass, FxaaPassLabel, LightBasePass, LightBasePassLabel, LightCullComputePass, LightCullComputePassLabel, MeshPass, MeshPrepNode, MeshPrepNodeLabel, MeshesPassLabel, PresentPass, PresentPassLabel, RenderGraphLabelValue, RenderTarget, ShadowMapsPass, ShadowMapsPassLabel, SubGraphNode, TransformsNode, TransformsNodeLabel, ViewTarget};
+use crate::render::graph::{BasePass, BasePassLabel, BasePassSlots, FxaaPass, FxaaPassLabel, LightBasePass, LightBasePassLabel, LightCullComputePass, LightCullComputePassLabel, MeshPass, MeshPrepNode, MeshPrepNodeLabel, MeshesPassLabel, PresentPass, PresentPassLabel, RenderGraphLabelValue, RenderTarget, ShadowMapsPass, ShadowMapsPassLabel, SpritePass, SpritePassLabel, SubGraphNode, TransformsNode, TransformsNodeLabel, ViewTarget};
 
 use super::graph::RenderGraph;
 use super::{resource::RenderPipeline, render_job::RenderJob};
@@ -135,13 +135,13 @@ impl BasicRenderer {
         let surface_target = RenderTarget::from_surface(surface, config);
         let view_target = Rc::new(RefCell::new(ViewTarget::new(device.clone(), surface_target)));
 
-        let mut main_graph = RenderGraph::new(device.clone(), queue.clone(), view_target.clone());
+        let mut main_graph = RenderGraph::new(device.clone(), queue.clone(), view_target.clone(), &world);
 
         debug!("Adding base pass");
         main_graph.add_node(BasePassLabel, BasePass::new());
 
         {
-            let mut forward_plus_graph = RenderGraph::new(device.clone(), queue.clone(), view_target.clone());
+            let mut forward_plus_graph = RenderGraph::new(device.clone(), queue.clone(), view_target.clone(), &world);
 
             debug!("Adding light base pass");
             forward_plus_graph.add_node(LightBasePassLabel, LightBasePass::new());
@@ -163,6 +163,10 @@ impl BasicRenderer {
             forward_plus_graph.add_node(MeshesPassLabel, MeshPass::new(material_bgl));
             forward_plus_graph.add_edge(TransformsNodeLabel, MeshPrepNodeLabel);
 
+            debug!("Adding sprite pass");
+            forward_plus_graph.add_node(SpritePassLabel, SpritePass::new());
+            forward_plus_graph.add_edge(TransformsNodeLabel, SpritePassLabel);
+
             forward_plus_graph.add_edge(LightBasePassLabel, LightCullComputePassLabel);
             forward_plus_graph.add_edge(LightCullComputePassLabel, MeshesPassLabel);
             forward_plus_graph.add_edge(MeshPrepNodeLabel, MeshesPassLabel);

crates/lyra-game/src/render/resource/compute_pipeline.rs

@@ -1,16 +1,18 @@
 use std::{ops::Deref, rc::Rc, sync::Arc};
 
+use lyra_resource::ResHandle;
 use wgpu::PipelineLayout;
 
-use super::{PipelineCompilationOptions, Shader};
+use crate::render::Shader;
+
+use super::PipelineCompilationOptions;
 
 //#[derive(Debug, Clone)]
 pub struct ComputePipelineDescriptor {
     pub label: Option<String>,
     pub layouts: Vec<Arc<wgpu::BindGroupLayout>>,
-    // TODO: make this a ResHandle<Shader>
     /// The compiled shader module for the stage.
-    pub shader: Rc<Shader>,
+    pub shader: ResHandle<Shader>,
     /// The entry point in the compiled shader.
     /// There must be a function in the shader with the same name.
     pub shader_entry_point: String,
@@ -76,13 +78,16 @@ impl ComputePipeline {
             None
         };
 
+        let shader = desc.shader.data_ref()
+            .expect("shader is not loaded, ensure its loaded before creating a pipeline!");
+        
         // an Rc was used here so that this shader could be reused by the fragment stage if
         // they share the same shader. I tried to do it without an Rc but couldn't get past
         // the borrow checker
         let compiled_shader = Rc::new(device.create_shader_module(wgpu::ShaderModuleDescriptor {
-            label: desc.shader.label.as_deref(),
+            label: shader.label.as_deref(),
             source: wgpu::ShaderSource::Wgsl(std::borrow::Cow::Borrowed(
-                &desc.shader.source,
+                &shader.source,
             )),
         }));
 

crates/lyra-game/src/render/resource/render_pipeline.rs

@@ -84,13 +84,16 @@ impl RenderPipeline {
             })
             .collect::<Vec<_>>();
 
+        let vertex_shader = desc.vertex.module.data_ref()
+            .expect("vertex shader is not loaded, ensure its loaded before creating a pipeline!");
+
         // an Rc was used here so that this shader could be reused by the fragment stage if
         // they share the same shader. I tried to do it without an Rc but couldn't get past
         // the borrow checker
         let vrtx_shad = Arc::new(device.create_shader_module(wgpu::ShaderModuleDescriptor {
-            label: desc.vertex.module.label.as_deref(),
+            label: vertex_shader.label.as_deref(),
             source: wgpu::ShaderSource::Wgsl(std::borrow::Cow::Borrowed(
-                &desc.vertex.module.source,
+                &vertex_shader.source,
             )),
         }));
         let vrtx_state = wgpu::VertexState {
@@ -101,12 +104,14 @@ impl RenderPipeline {
         };
 
         let frag_module = desc.fragment.as_ref().map(|f| {
-            if f.module == desc.vertex.module {
+            if f.module.uuid() == desc.vertex.module.uuid() {
                 vrtx_shad.clone()
             } else {
+                let frag_shader = f.module.data_ref()
+                    .expect("vertex shader is not loaded, ensure its loaded before creating a pipeline!");
                 Arc::new(device.create_shader_module(wgpu::ShaderModuleDescriptor {
-                    label: f.module.label.as_deref(),
-                    source: wgpu::ShaderSource::Wgsl(std::borrow::Cow::Borrowed(&f.module.source)),
+                    label: frag_shader.label.as_deref(),
+                    source: wgpu::ShaderSource::Wgsl(std::borrow::Cow::Borrowed(&frag_shader.source)),
                 }))
             }
         });

crates/lyra-game/src/render/resource/shader.rs

@@ -1,4 +1,6 @@
-use std::rc::Rc;
+use lyra_resource::ResHandle;
+
+use crate::render::Shader;
 
 #[derive(Debug, Default, Clone)]
 pub struct VertexBufferLayout {
@@ -18,11 +20,10 @@ impl<'a> From<wgpu::VertexBufferLayout<'a>> for VertexBufferLayout {
 }
 
 /// Describes the vertex stage in a render pipeline.
-#[derive(Debug, Clone)]
+#[derive(Clone)]
 pub struct VertexState {
-    // TODO: make this a ResHandle<Shader>
     /// The compiled shader module for the stage.
-    pub module: Rc<Shader>,
+    pub module: ResHandle<Shader>,
     /// The entry point in the compiled shader.
     /// There must be a function in the shader with the same name.
     pub entry_point: String,
@@ -30,18 +31,11 @@ pub struct VertexState {
     pub buffers: Vec<VertexBufferLayout>,
 }
 
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub struct Shader {
-    pub label: Option<String>,
-    pub source: String,
-}
-
 /// Describes the fragment stage in the render pipeline.
-#[derive(Debug, Clone)]
+#[derive(Clone)]
 pub struct FragmentState {
-    // TODO: make this a ResHandle<Shader>
     /// The compiled shader module for the stage.
-    pub module: Rc<Shader>,
+    pub module: ResHandle<Shader>,
     /// The entry point in the compiled shader.
     /// There must be a function in the shader with the same name.
     pub entry_point: String,

crates/lyra-game/src/render/shader_loader.rs

@@ -0,0 +1,97 @@
+use std::sync::Arc;
+
+use async_std::sync::RwLock;
+use lyra_resource::{loader::{LoaderError, ResourceLoader}, ResHandle, ResourceData};
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct Shader {
+    pub label: Option<String>,
+    pub source: String,
+    pub dependent_modules: Option<String>,
+}
+
+impl ResourceData for Shader {
+    fn as_any(&self) -> &dyn std::any::Any {
+        self
+    }
+
+    fn as_any_mut(&mut self) -> &mut dyn std::any::Any {
+        self
+    }
+
+    fn dependencies(&self) -> Vec<lyra_resource::UntypedResHandle> {
+        vec![]
+    }
+}
+
+/// A WGSL shader module loader with a preprocessor.
+/// 
+/// This will load resources with mimetype of `text/wgsl` and `.wgsl` file extensions.
+#[derive(Default)]
+pub struct PreprocessShaderLoader {
+    processor: Arc<RwLock<wgsl_preprocessor::Processor>>,
+}
+
+async fn load_shader_str(processor: Arc<RwLock<wgsl_preprocessor::Processor>>, content: &str) -> Result<Shader, LoaderError> {
+    let mut processor = processor.write().await;
+
+    let mod_path = processor.parse_module(content)
+        .map_err(|e| LoaderError::DecodingError(Arc::new(e.into())))?;
+
+    let content = match &mod_path {
+        Some(path) => processor.preprocess_module(&path)
+            .map_err(|e| LoaderError::DecodingError(Arc::new(e.into())))?,
+        None => content.to_owned(),
+    };
+
+    Ok(Shader {
+        label: mod_path,
+        source: content,
+        dependent_modules: None,
+    })
+}
+
+impl ResourceLoader for PreprocessShaderLoader {
+    fn extensions(&self) -> &[&str] {
+        &[
+            "wgsl"
+        ]
+    }
+
+    fn mime_types(&self) -> &[&str] {
+        &[
+            "text/wgsl"
+        ]
+    }
+
+    fn load(&self, _: lyra_resource::ResourceManager, path: &str) -> lyra_resource::loader::PinedBoxLoaderFuture {
+        // cant use &str across async
+        let path = path.to_string();
+        let processor = self.processor.clone();
+
+        Box::pin(async move {
+            let module_str = std::fs::read_to_string(&path)
+                .map_err(|e| LoaderError::DecodingError(Arc::new(e.into())))?;
+            let shader = load_shader_str(processor, &module_str).await?;
+
+            Ok(Box::new(shader) as Box<dyn ResourceData>)
+        })
+    }
+
+    fn load_bytes(&self, _: lyra_resource::ResourceManager, bytes: Vec<u8>, offset: usize, length: usize) -> lyra_resource::loader::PinedBoxLoaderFuture {
+        let processor = self.processor.clone();
+        
+        Box::pin(async move {
+            let end = offset + length;
+            let contents = std::str::from_utf8(&bytes[offset..end])
+                .map_err(|e| LoaderError::DecodingError(Arc::new(e.into())))?;
+            let shader = load_shader_str(processor, &contents).await?;
+
+            Ok(Box::new(shader) as Box<dyn ResourceData>)
+        })
+    }
+
+    fn create_erased_handle(&self) -> std::sync::Arc<dyn lyra_resource::ResourceStorage> {
+        Arc::from(ResHandle::<Shader>::new_loading(None))
+    }
+}

crates/lyra-game/src/render/shaders/2d/sprite_main.wgsl

@@ -0,0 +1,85 @@
+const ALPHA_CUTOFF = 0.1;
+
+struct VertexInput {
+    @location(0) position: vec3<f32>,
+    @location(1) tex_coords: vec2<f32>,
+    @builtin(instance_index) instance_index: u32,
+}
+
+struct VertexOutput {
+    @builtin(position) clip_position: vec4<f32>,
+    @location(0) tex_coords: vec2<f32>,
+    @location(1) world_position: vec3<f32>,
+    @location(2) instance_index: u32
+}
+
+struct TransformData {
+    transform: mat4x4<f32>,
+    normal_matrix: mat4x4<f32>,
+}
+
+struct URect {
+    min: vec2<u32>,
+    max: vec2<u32>,
+}
+
+struct CameraUniform {
+    view: mat4x4<f32>,
+    inverse_projection: mat4x4<f32>,
+    view_projection: mat4x4<f32>,
+    projection: mat4x4<f32>,
+    position: vec3<f32>,
+    tile_debug: u32,
+}
+
+@group(1) @binding(0)
+var<uniform> u_model_transform_data: TransformData;
+
+@group(2) @binding(0)
+var<uniform> u_camera: CameraUniform;
+
+@vertex
+fn vs_main(
+    in: VertexInput,
+) -> VertexOutput {
+    var out: VertexOutput;
+    var world_position: vec4<f32> = u_model_transform_data.transform * vec4<f32>(in.position, 1.0);
+    out.world_position = world_position.xyz;
+    out.tex_coords = in.tex_coords;
+    out.clip_position = u_camera.view_projection * world_position;
+    out.instance_index = in.instance_index;
+    return out;
+}
+
+@group(0) @binding(0)
+var t_diffuse: texture_2d<f32>;
+
+@group(0) @binding(1)
+var s_diffuse: sampler;
+
+@group(0) @binding(2)
+var<storage, read> u_sprite_atlas_frames: array<URect>;
+
+@fragment
+fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
+    let frame = u_sprite_atlas_frames[in.instance_index];
+    var region_coords = in.tex_coords;
+
+    if (frame.min.x != 0 || frame.min.y != 0 || frame.max.x != 0 || frame.max.y != 0) {
+        let dim = vec2<f32>(textureDimensions(t_diffuse));
+        // convert tex coords to frame
+        region_coords = vec2<f32>(
+            mix(f32(frame.min.x), f32(frame.max.x), in.tex_coords.x),
+            mix(f32(frame.min.y), f32(frame.max.y), in.tex_coords.y)
+        );
+        // convert frame coords to texture coords
+        region_coords /= dim;
+    }
+
+    let object_color: vec4<f32> = textureSample(t_diffuse, s_diffuse, region_coords);
+    if (object_color.a < ALPHA_CUTOFF) {
+        discard;
+    }
+
+    return object_color;
+}

crates/lyra-game/src/render/shaders/light_cull.comp.wgsl

@@ -16,7 +16,7 @@ struct CameraUniform {
     projection: mat4x4<f32>,
     position: vec3f,
     tile_debug: u32,
-};
+}
 
 struct Light {
     position: vec3f,
@@ -32,12 +32,12 @@ struct Light {
     spot_cutoff: f32,
     spot_outer_cutoff: f32,
     light_shadow_uniform_index: array<i32, 6>,
-};
+}
 
 struct Lights {
     light_count: u32,
     data: array<Light>,
-};
+}
 
 struct Cone {
     tip: vec3f,

crates/lyra-game/src/render/texture_atlas.rs

@@ -28,7 +28,7 @@ impl AtlasFrame {
     }
 }
 
-pub struct TextureAtlas<P: AtlasPacker = SkylinePacker> {
+pub struct PackedTextureAtlas<P: AtlasPacker = SkylinePacker> {
     atlas_size: UVec2,
 
     texture_format: wgpu::TextureFormat,
@@ -38,7 +38,7 @@ pub struct TextureAtlas<P: AtlasPacker = SkylinePacker> {
     packer: P,
 }
 
-impl<P: AtlasPacker> TextureAtlas<P> {
+impl<P: AtlasPacker> PackedTextureAtlas<P> {
     pub fn new(
         device: &wgpu::Device,
         format: wgpu::TextureFormat,

crates/lyra-game/src/render/vertex.rs

@@ -75,7 +75,7 @@ impl Vertex2D {
 
     pub fn desc<'a>() -> wgpu::VertexBufferLayout<'a> {
         wgpu::VertexBufferLayout {
-            array_stride: std::mem::size_of::<Vertex>() as wgpu::BufferAddress,
+            array_stride: std::mem::size_of::<Vertex2D>() as wgpu::BufferAddress,
             step_mode: wgpu::VertexStepMode::Vertex,
             attributes: &[
                 wgpu::VertexAttribute {

crates/lyra-game/src/scene/camera.rs

@@ -1,36 +1,206 @@
-use lyra_ecs::Component;
+use glam::{Mat4, Vec2};
+use lyra_ecs::{Bundle, Component};
+use lyra_math::{Angle, Rect};
 use lyra_reflect::Reflect;
 
-use crate::{math::{Angle, Transform}, render::camera::CameraProjectionMode};
-
-#[derive(Clone, Component, Reflect)]
-pub struct CameraComponent {
-    pub transform: Transform,
-    pub fov: Angle,
-    pub mode: CameraProjectionMode,
-    pub debug: bool,
+/// The method of scaling for an [`OrthographicProjection`].
+#[derive(Debug, Clone, Copy, PartialEq, Reflect)]
+pub enum ScaleMode {
+    /// No scaling, keep everything the same size as the viewport.
+    Viewport,
+    /// The width of the projection in world units.
+    /// 
+    /// Height will be set based off of the viewport's aspect ratio.
+    Width(f32),
+    /// The height of the projection in world units.
+    /// 
+    /// Width will be set based off of the viewport's aspect ratio.
+    Height(f32),
+    /// The exact size of the projection in world units.
+    /// 
+    /// Ignoring viewport size, likely causes stretching.
+    Size(Vec2),
+    /// Keep the projection size below a maximum value in world units, while keeping the aspect ratio.
+    MaxSize(Vec2),
+    /// Keep the projection size above a minimum value in world units, while keeping the aspect ratio.
+    MinSize(Vec2),
 }
 
-impl Default for CameraComponent {
+impl Default for ScaleMode {
+    fn default() -> Self {
+        ScaleMode::Viewport
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Reflect)]
+pub struct OrthographicProjection {
+    pub scale_mode: ScaleMode,
+    pub scale: f32,
+    pub znear: f32,
+    pub zfar: f32,
+}
+
+impl Default for OrthographicProjection {
+    fn default() -> Self {
+        Self {
+            scale_mode: Default::default(),
+            scale: 1.0,
+            znear: 0.0,
+            zfar: 1000.0,
+        }
+    }
+}
+
+impl OrthographicProjection {
+    fn get_rect(&self, viewport_size: Vec2) -> Rect {
+        let origin;
+        let size;
+
+        match self.scale_mode {
+            ScaleMode::Viewport => {
+                origin = viewport_size * 0.5;
+                size = viewport_size;
+            },
+            ScaleMode::Width(width) => {
+                let aspect = viewport_size.x / viewport_size.y;
+                let origin_x = width * 0.5;
+                let scaled_height = width / aspect;
+                let origin_y  = scaled_height * 0.5;
+
+                origin = Vec2::new(origin_x, origin_y);
+                size = Vec2::new(width, scaled_height);
+            },
+            ScaleMode::Height(height) => {
+                let aspect = viewport_size.x / viewport_size.y;
+                let origin_y = height * 0.5;
+                let scaled_width = height * aspect;
+                let origin_x = scaled_width * 0.5;
+
+                origin = Vec2::new(origin_x, origin_y);
+                size = Vec2::new(scaled_width, height);
+            },
+            ScaleMode::Size(s) => {
+                origin = s * 0.5;
+                size = s;
+            },
+            ScaleMode::MaxSize(s) => {
+                let clamped = s.min(viewport_size);
+                origin = clamped * 0.5;
+                size = clamped;
+            },
+            ScaleMode::MinSize(s) => {
+                let clamped = s.max(viewport_size);
+                origin = clamped * 0.5;
+                size = clamped;
+            }
+        }
+
+        Rect::new(self.scale * -origin.x,
+            self.scale * -origin.y,
+            self.scale * size.x - origin.x,
+            self.scale * size.y - origin.y)
+    }
+
+    pub fn to_mat(&self, viewport_size: Vec2) -> Mat4 {
+        let rect = self.get_rect(viewport_size);
+
+        glam::Mat4::orthographic_rh(
+            rect.min.x,
+            rect.max.x,
+            rect.min.y,
+            rect.max.y,
+            -1000.0,
+            1000.0,
+        )
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Reflect)]
+pub struct PerspectiveProjection {
+    pub fov: Angle,
+    pub znear: f32,
+    pub zfar: f32,
+}
+
+impl Default for PerspectiveProjection {
     fn default() -> Self {
         Self {
-            transform: Transform::default(),
             fov: Angle::Degrees(45.0),
-            mode: CameraProjectionMode::Perspective,
-            debug: false,
+            znear: 0.1,
+            zfar: 100.0,
         }
     }
 }
 
-impl CameraComponent {
-    pub fn new_3d() -> Self {
-        Self::default()
+impl PerspectiveProjection {
+    pub fn to_mat(&self, viewport_size: Vec2) -> Mat4 {
+        let aspect = viewport_size.x / viewport_size.y;
+        glam::Mat4::perspective_rh(self.fov.to_radians(), aspect, self.znear, self.zfar)
+    }
 }
 
-    pub fn new_2d() -> Self {
-        CameraComponent {
-            mode: CameraProjectionMode::Orthographic,
+#[derive(Debug, Clone, Copy, PartialEq, Reflect, Component)]
+pub enum CameraProjection {
+    /// 3d camera projection
+    Perspective(PerspectiveProjection),
+    /// 2d camera projection
+    Orthographic(OrthographicProjection),
+}
+
+impl Default for CameraProjection {
+    fn default() -> Self {
+        Self::Perspective(PerspectiveProjection::default())
+    }
+}
+
+impl CameraProjection {
+    pub fn to_mat4(&self, viewport_size: Vec2) -> Mat4 {
+        match self {
+            CameraProjection::Perspective(proj) => proj.to_mat(viewport_size),
+            CameraProjection::Orthographic(proj) => proj.to_mat(viewport_size),
+        }
+    }
+}
+
+#[derive(Clone, Default, Component, Reflect)]
+pub struct Camera2d;
+
+#[derive(Clone, Component, Reflect)]
+pub struct Camera {
+    pub is_active: bool,
+}
+
+impl Default for Camera {
+    fn default() -> Self {
+        Self { is_active: true }
+    }
+}
+
+/// A component bundle for a Camera entity.
+#[derive(Clone, Default, Bundle)]
+pub struct CameraBundle {
+    pub camera: Camera,
+    pub projection: CameraProjection,
+}
+
+/// A component bundle for a 2d Camera entity.
+#[derive(Clone, Bundle)]
+pub struct Camera2dBundle {
+    pub camera: Camera,
+    pub projection: CameraProjection,
+    pub camera_2d: Camera2d,
+}
+
+impl Default for Camera2dBundle {
+    fn default() -> Self {
+        Self {
+            camera: Default::default(),
+            projection: CameraProjection::Orthographic(OrthographicProjection {
+                znear: -1000.0,
+                zfar: 1000.0,
                 ..Default::default()
+            }),
+            camera_2d: Default::default(),
         }
     }
 }

crates/lyra-game/src/scene/free_fly_camera.rs

@@ -1,11 +1,10 @@
 use glam::{EulerRot, Quat, Vec3};
 use lyra_ecs::{query::{Res, View}, Component};
+use lyra_math::Transform;
 use lyra_reflect::Reflect;
 
 use crate::{game::App, input::ActionHandler, plugin::Plugin, DeltaTime};
 
-use super::CameraComponent;
-
 pub const ACTLBL_MOVE_UP_DOWN: &str = "MoveUpDown";
 pub const ACTLBL_MOVE_LEFT_RIGHT: &str = "MoveLeftRight";
 pub const ACTLBL_MOVE_FORWARD_BACKWARD: &str = "MoveForwardBackward";
@@ -14,13 +13,13 @@ pub const ACTLBL_LOOK_UP_DOWN: &str = "LookUpDown";
 pub const ACTLBL_LOOK_ROLL: &str = "LookRoll";
 
 #[derive(Clone, Component, Reflect)]
-pub struct FreeFlyCamera {
+pub struct FreeFly3dCamera {
     pub speed: f32,
     pub look_speed: f32,
     pub mouse_sensitivity: f32,
 }
 
-impl Default for FreeFlyCamera {
+impl Default for FreeFly3dCamera {
     fn default() -> Self {
         Self {
             speed: 4.0,
@@ -30,7 +29,7 @@ impl Default for FreeFlyCamera {
     }
 }
 
-impl FreeFlyCamera {
+impl FreeFly3dCamera {
     pub fn new(speed: f32, look_speed: f32, mouse_sensitivity: f32) -> Self {
         Self {
             speed,
@@ -40,11 +39,11 @@ impl FreeFlyCamera {
     }
 }
 
-pub fn free_fly_camera_controller(delta_time: Res<DeltaTime>, handler: Res<ActionHandler>, view: View<(&mut CameraComponent, &FreeFlyCamera)>) -> anyhow::Result<()> {
+pub fn free_fly_3d_camera_controller(delta_time: Res<DeltaTime>, handler: Res<ActionHandler>, view: View<(&mut Transform, &FreeFly3dCamera)>) -> anyhow::Result<()> {
     let delta_time = **delta_time;
-    for (mut cam, fly) in view.into_iter() {
-        let forward = cam.transform.forward();
-        let left = cam.transform.left();
+    for (mut transform, fly) in view.into_iter() {
+        let forward = transform.forward();
+        let left = transform.left();
         let up = Vec3::Y;
 
         let move_y = handler.get_axis_modifier(ACTLBL_MOVE_UP_DOWN).unwrap_or(0.0);
@@ -57,7 +56,7 @@ pub fn free_fly_camera_controller(delta_time: Res<DeltaTime>, handler: Res<Actio
         velocity += move_z * forward;
 
         if velocity != Vec3::ZERO {
-            cam.transform.translation += velocity.normalize() * fly.speed * delta_time; // TODO: speeding up
+            transform.translation += velocity.normalize() * fly.speed * delta_time; // TODO: speeding up
         }
 
         let motion_x = handler.get_axis_modifier(ACTLBL_LOOK_LEFT_RIGHT).unwrap_or(0.0);
@@ -72,13 +71,13 @@ pub fn free_fly_camera_controller(delta_time: Res<DeltaTime>, handler: Res<Actio
         if camera_rot != Vec3::ZERO {
             let look_velocity = camera_rot * fly.look_speed * delta_time;
 
-            let (mut y, mut x, _) = cam.transform.rotation.to_euler(EulerRot::YXZ);
+            let (mut y, mut x, _) = transform.rotation.to_euler(EulerRot::YXZ);
             x += look_velocity.x;
             y += look_velocity.y;
             x = x.clamp(-1.54, 1.54);
 
             // rotation is not commutative, keep this order to avoid unintended roll
-            cam.transform.rotation = Quat::from_axis_angle(Vec3::Y, y)
+            transform.rotation = Quat::from_axis_angle(Vec3::Y, y)
                 * Quat::from_axis_angle(Vec3::X, x);
         }
     }
@@ -92,6 +91,6 @@ pub struct FreeFlyCameraPlugin;
 
 impl Plugin for FreeFlyCameraPlugin {
     fn setup(&mut self, app: &mut App) {
-        app.with_system("free_fly_camera_system", free_fly_camera_controller, &[]);
+        app.with_system("free_fly_camera_system", free_fly_3d_camera_controller, &[]);
     }
 }

crates/lyra-game/src/scene/mod.rs

@@ -1,7 +1,10 @@
-pub mod camera;
+mod camera;
 pub use camera::*;
 
-pub mod free_fly_camera;
+mod free_fly_camera;
 pub use free_fly_camera::*;
 
+mod top_down_controller;
+pub use top_down_controller::*;
+
 pub use lyra_scene::*;

crates/lyra-game/src/scene/top_down_controller.rs

@@ -0,0 +1,100 @@
+use std::ops::DerefMut;
+
+use glam::{EulerRot, Quat, Vec3};
+use lyra_ecs::{query::{Res, View}, Component};
+use lyra_math::Transform;
+use lyra_reflect::Reflect;
+
+use crate::{game::App, input::ActionHandler, plugin::Plugin, DeltaTime};
+
+use super::{CameraProjection, ACTLBL_LOOK_LEFT_RIGHT, ACTLBL_LOOK_ROLL, ACTLBL_LOOK_UP_DOWN, ACTLBL_MOVE_FORWARD_BACKWARD, ACTLBL_MOVE_LEFT_RIGHT, ACTLBL_MOVE_UP_DOWN};
+
+#[derive(Clone, Component, Reflect)]
+pub struct TopDown2dCamera {
+    pub speed: f32,
+    /// The zoom speed of the camera, set to `None` to disable zooming.
+    pub zoom_speed: Option<f32>,
+    /// The smallest scale of the orthographic projection view.
+    /// 
+    /// When the scale of the projection approaches zero, the more zoomed in the camera
+    /// will appear.
+    pub max_zoom: f32,
+    pub min_zoom: f32,
+}
+
+impl Default for TopDown2dCamera {
+    fn default() -> Self {
+        Self {
+            speed: 5.0,
+            zoom_speed: None,
+            max_zoom: 0.36,
+            min_zoom: 1.0,
+        }
+    }
+}
+
+pub fn top_down_2d_camera_controller(delta_time: Res<DeltaTime>, handler: Res<ActionHandler>, view: View<(&mut Transform, &mut CameraProjection, &TopDown2dCamera)>) -> anyhow::Result<()> {
+    let delta_time = **delta_time;
+    for (mut transform, mut proj, controller) in view.into_iter() {
+        let left = transform.left();
+        let up = Vec3::Y;
+
+        let move_y = handler.get_axis_modifier(ACTLBL_MOVE_FORWARD_BACKWARD).unwrap_or(0.0);
+        let move_x = handler.get_axis_modifier(ACTLBL_MOVE_LEFT_RIGHT).unwrap_or(0.0);
+        let move_z = handler.get_axis_modifier(ACTLBL_MOVE_UP_DOWN);
+
+        let mut velocity = Vec3::ZERO;
+        velocity += move_y * up;
+        velocity += move_x * left;
+        
+        if let (Some(zoom_speed), Some(move_z)) = (controller.zoom_speed, move_z) {
+            match proj.deref_mut() {
+                CameraProjection::Orthographic(ortho) => {
+                    let m = move_z * zoom_speed * delta_time;
+                    ortho.scale = (ortho.scale + m).clamp(controller.max_zoom, controller.min_zoom);
+                },
+                _ => {}
+            }
+        }
+
+        if velocity != Vec3::ZERO {
+            transform.translation += velocity.normalize() * controller.speed * delta_time; // TODO: speeding up
+        }
+
+        let motion_x = handler.get_axis_modifier(ACTLBL_LOOK_LEFT_RIGHT).unwrap_or(0.0);
+        let motion_y = handler.get_axis_modifier(ACTLBL_LOOK_UP_DOWN).unwrap_or(0.0);
+        let motion_z = handler.get_axis_modifier(ACTLBL_LOOK_ROLL).unwrap_or(0.0);
+        
+        let mut camera_rot = Vec3::ZERO;
+        camera_rot.y -= motion_x;
+        camera_rot.x -= motion_y;
+        camera_rot.z -= motion_z;
+
+        if camera_rot != Vec3::ZERO {
+            let look_velocity = camera_rot * delta_time;
+
+            let (mut y, mut x, _) = transform.rotation.to_euler(EulerRot::YXZ);
+            x += look_velocity.x;
+            y += look_velocity.y;
+            x = x.clamp(-1.54, 1.54);
+
+            // rotation is not commutative, keep this order to avoid unintended roll
+            transform.rotation = Quat::from_axis_angle(Vec3::Y, y)
+                * Quat::from_axis_angle(Vec3::X, x);
+        }
+    }
+
+    Ok(())
+}
+
+/// A plugin that adds the top down 2d camera controller system to the world.
+/// 
+/// It is expected that there is a [`TopDown2dCamera`] in the world, if there isn't,
+/// the camera would not move.
+pub struct TopDown2dCameraPlugin;
+
+impl Plugin for TopDown2dCameraPlugin {
+    fn setup(&mut self, app: &mut App) {
+        app.with_system("top_down_2d_camera_system", top_down_2d_camera_controller, &[]);
+    }
+}

crates/lyra-game/src/sprite/mod.rs

@@ -3,6 +3,9 @@ use lyra_reflect::Reflect;
 use lyra_resource::ResHandle;
 use lyra_math::{Vec3, Vec2};
 
+mod texture_atlas;
+pub use texture_atlas::*;
+
 /// How the sprite is positioned and rotated relative to its [`Transform`].
 /// 
 /// Default pivot is `Pivot::Center`, this makes it easier to rotate the sprites.
@@ -45,7 +48,7 @@ impl Pivot {
 
 #[derive(Clone, Component, Reflect)]
 pub struct Sprite {
-    pub texture: ResHandle<lyra_resource::Texture>,
+    pub texture: ResHandle<lyra_resource::Image>,
     pub color: Vec3,
     pub pivot: Pivot,
 }

crates/lyra-game/src/sprite/texture_atlas.rs

@@ -0,0 +1,105 @@
+use glam::{UVec2, Vec3};
+use lyra_ecs::Component;
+use lyra_math::URect;
+use lyra_reflect::Reflect;
+use lyra_resource::ResHandle;
+
+use super::Pivot;
+
+/// A texture atlas of multiple sprites.
+#[derive(Clone, Component, Reflect)]
+pub struct TextureAtlas {
+    pub texture: ResHandle<lyra_resource::Image>,
+    /// The coordinates in the texture where the grid starts.
+    pub grid_offset: UVec2,
+    /// The size of the grid in cells.
+    pub grid_size: UVec2,
+    /// The size of each cell.
+    pub cell_size: UVec2,
+
+    pub sprite_color: Vec3,
+    pub pivot: Pivot,
+}
+
+impl TextureAtlas {
+    /// The cell x and y in the grid of a specific index.
+    pub fn index_cell(&self, i: u32) -> UVec2 {
+        let x = i % self.grid_size.x;
+        let y = i / self.grid_size.x;
+        UVec2 { x, y }
+    }
+
+    /// The coords of the cell at x and y in the grid.
+    /// 
+    /// The indices are different then the image coords, this is the position in the grid.
+    /// So if you have a 9x7 grid, and wanted to get the 1nd cell on the 2nd row, you'd
+    /// use the values `x = 0, y = 1` (indices start at zero like arrays).
+    #[inline(always)]
+    pub fn cell_coords(&self, x: u32, y: u32) -> UVec2 {
+        UVec2 {
+            x: x * self.cell_size.x,
+            y: y * self.cell_size.y,
+        }
+    }
+
+    /// The coords of the cell at an index.
+    #[inline(always)]
+    pub fn index_coords(&self, i: u32) -> UVec2 {
+        let cell = self.index_cell(i);
+
+        self.cell_coords(cell.x, cell.y)
+    }
+
+    /// The rectangle of the cell at the x and y indices in the grid.
+    /// 
+    /// The indices are different then the image coords, this is the position in the grid.
+    /// So if you have a 9x7 grid, and wanted to get the 1nd cell on the 2nd row, you'd
+    /// use the values `x = 0, y = 1` (indices start at zero like arrays).
+    #[inline(always)]
+    pub fn cell_rect(&self, x: u32, y: u32) -> URect {
+        let start = self.cell_coords(x, y);
+        let end = start + self.cell_size;
+        URect { min: start, max: end }
+    }
+
+    /// The rectangle of the cell at an index.
+    #[inline(always)]
+    pub fn index_rect(&self, i: u32) -> URect {
+        let cell = self.index_cell(i);
+        self.cell_rect(cell.x, cell.y)
+    }
+}
+
+impl lyra_resource::ResourceData for TextureAtlas {
+    fn as_any(&self) -> &dyn std::any::Any {
+        self
+    }
+
+    fn as_any_mut(&mut self) -> &mut dyn std::any::Any {
+        self
+    }
+
+    fn dependencies(&self) -> Vec<lyra_resource::UntypedResHandle> {
+        vec![self.texture.untyped_clone()]
+    }
+}
+
+/// A sprite from a texture atlas.
+#[derive(Clone, Component, Reflect)]
+pub struct AtlasSprite {
+    pub atlas: ResHandle<TextureAtlas>,
+    pub sprite: URect,
+}
+
+impl AtlasSprite {
+    #[inline(always)]
+    pub fn from_atlas_index(atlas: ResHandle<TextureAtlas>, i: u32) -> Self {
+        let a = atlas.data_ref().unwrap();
+        let rect = a.index_rect(i);
+
+        Self {
+            atlas: atlas.clone(),
+            sprite: rect, 
+        }
+    }
+}

crates/lyra-gltf/src/loader.rs

@@ -24,7 +24,7 @@ enum ModelLoaderError {
 
 impl From<ModelLoaderError> for LoaderError {
     fn from(value: ModelLoaderError) -> Self {
-        LoaderError::DecodingError(value.into())
+        LoaderError::DecodingError(Arc::new(value.into()))
     }
 }
 
@@ -181,7 +181,7 @@ impl ResourceLoader for GltfLoader {
             let parent_path = parent_path.display().to_string();
 
             let gltf = gltf::Gltf::open(&path)
-                .map_err(|ge| LoaderError::DecodingError(ge.into()))?;
+                .map_err(|ge| LoaderError::DecodingError(Arc::new(ge.into())))?;
 
             let mut use_bin = false;
             let buffers: Vec<Vec<u8>> = gltf.buffers().flat_map(|b| match b.source() {
@@ -290,7 +290,7 @@ mod tests {
 
         let manager = ResourceManager::new();
         let gltf = manager.request::<Gltf>(&path).unwrap();
-        assert!(gltf.wait_for_load_timeout(Duration::from_secs(10)), "failed to load gltf, hit 10 second timeout");
+        assert!(gltf.wait_for_load_timeout(Duration::from_secs(10)).is_ok_and(|r| r), "failed to load gltf, hit 10 second timeout");
         let gltf = gltf.data_ref().unwrap();
 
         assert_eq!(gltf.scenes.len(), 1);

crates/lyra-math/Cargo.toml

@@ -6,4 +6,5 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-glam = { version = "0.29.0" }
+bytemuck = "1.19.0"
+glam = { version = "0.29.0", features = ["bytemuck"] }

crates/lyra-math/src/angle.rs

@@ -10,7 +10,7 @@ pub fn radians_to_degrees(radians: f32) -> f32 {
     radians * 180.0 / PI
 }
 
-#[derive(Clone, Copy, Debug)]
+#[derive(Clone, Copy, Debug, PartialEq)]
 pub enum Angle {
     Degrees(f32),
     Radians(f32),

crates/lyra-math/src/i32/mod.rs

@@ -0,0 +1,2 @@
+mod rect;
+pub use rect::*;

crates/lyra-math/src/i32/rect.rs

@@ -0,0 +1,90 @@
+use glam::IVec2;
+
+#[repr(C)]
+#[derive(Debug, Clone, Copy, Default, PartialEq, bytemuck::Pod, bytemuck::Zeroable)]
+pub struct IRect {
+    pub min: IVec2,
+    pub max: IVec2,
+}
+
+impl IRect {
+    pub const ZERO: IRect = IRect { min: IVec2::ZERO, max: IVec2::ZERO };
+
+    pub fn new(x1: i32, y1: i32, x2: i32, y2: i32) -> Self {
+        Self {
+            min: IVec2::new(x1, y1),
+            max: IVec2::new(x2, y2),
+        }
+    }
+
+    pub fn from_vec(min: IVec2, max: IVec2) -> Self {
+        Self {
+            min,
+            max
+        }
+    }
+
+    pub fn dimensions(&self) -> IVec2 {
+        self.max - self.min
+    }
+}
+
+impl std::ops::Add for IRect {
+    type Output = IRect;
+
+    fn add(self, rhs: Self) -> Self::Output {
+        IRect::from_vec(self.min + rhs.min, self.max + rhs.max)
+    }
+}
+
+impl std::ops::AddAssign for IRect {
+    fn add_assign(&mut self, rhs: Self) {
+        self.min += rhs.min;
+        self.max += rhs.max;
+    }
+}
+
+impl std::ops::Sub for IRect {
+    type Output = IRect;
+
+    fn sub(self, rhs: Self) -> Self::Output {
+        IRect::from_vec(self.min - rhs.min, self.max - rhs.max)
+    }
+}
+
+impl std::ops::SubAssign for IRect {
+    fn sub_assign(&mut self, rhs: Self) {
+        self.min -= rhs.min;
+        self.max -= rhs.max;
+    }
+}
+
+impl std::ops::Mul for IRect {
+    type Output = IRect;
+
+    fn mul(self, rhs: Self) -> Self::Output {
+        IRect::from_vec(self.min * rhs.min, self.max * rhs.max)
+    }
+}
+
+impl std::ops::MulAssign for IRect {
+    fn mul_assign(&mut self, rhs: Self) {
+        self.min *= rhs.min;
+        self.max *= rhs.max;
+    }
+}
+
+impl std::ops::Div for IRect {
+    type Output = IRect;
+
+    fn div(self, rhs: Self) -> Self::Output {
+        IRect::from_vec(self.min / rhs.min, self.max / rhs.max)
+    }
+}
+
+impl std::ops::DivAssign for IRect {
+    fn div_assign(&mut self, rhs: Self) {
+        self.min /= rhs.min;
+        self.max /= rhs.max;
+    }
+}

crates/lyra-math/src/lib.rs

@@ -7,6 +7,17 @@ pub use angle::*;
 mod area;
 pub use area::*;
 
+mod rect;
+pub use rect::*;
+
+#[allow(hidden_glob_reexports)]
+mod u32;
+pub use u32::*;
+
+#[allow(hidden_glob_reexports)]
+mod i32;
+pub use i32::*;
+
 pub mod transform;
 pub use transform::*;
 

crates/lyra-math/src/rect.rs

@@ -0,0 +1,90 @@
+use glam::Vec2;
+
+#[repr(C)]
+#[derive(Debug, Clone, Copy, Default, PartialEq, bytemuck::Pod, bytemuck::Zeroable)]
+pub struct Rect {
+    pub min: Vec2,
+    pub max: Vec2,
+}
+
+impl Rect {
+    pub const ZERO: Rect = Rect { min: Vec2::ZERO, max: Vec2::ZERO };
+
+    pub fn new(x1: f32, y1: f32, x2: f32, y2: f32) -> Self {
+        Self {
+            min: Vec2::new(x1, y1),
+            max: Vec2::new(x2, y2),
+        }
+    }
+
+    pub fn from_vec(min: Vec2, max: Vec2) -> Self {
+        Self {
+            min,
+            max
+        }
+    }
+
+    pub fn dimensions(&self) -> Vec2 {
+        (self.max - self.min).abs()
+    }
+}
+
+impl std::ops::Add for Rect {
+    type Output = Rect;
+
+    fn add(self, rhs: Self) -> Self::Output {
+        Rect::from_vec(self.min + rhs.min, self.max + rhs.max)
+    }
+}
+
+impl std::ops::AddAssign for Rect {
+    fn add_assign(&mut self, rhs: Self) {
+        self.min += rhs.min;
+        self.max += rhs.max;
+    }
+}
+
+impl std::ops::Sub for Rect {
+    type Output = Rect;
+
+    fn sub(self, rhs: Self) -> Self::Output {
+        Rect::from_vec(self.min - rhs.min, self.max - rhs.max)
+    }
+}
+
+impl std::ops::SubAssign for Rect {
+    fn sub_assign(&mut self, rhs: Self) {
+        self.min -= rhs.min;
+        self.max -= rhs.max;
+    }
+}
+
+impl std::ops::Mul for Rect {
+    type Output = Rect;
+
+    fn mul(self, rhs: Self) -> Self::Output {
+        Rect::from_vec(self.min * rhs.min, self.max * rhs.max)
+    }
+}
+
+impl std::ops::MulAssign for Rect {
+    fn mul_assign(&mut self, rhs: Self) {
+        self.min *= rhs.min;
+        self.max *= rhs.max;
+    }
+}
+
+impl std::ops::Div for Rect {
+    type Output = Rect;
+
+    fn div(self, rhs: Self) -> Self::Output {
+        Rect::from_vec(self.min / rhs.min, self.max / rhs.max)
+    }
+}
+
+impl std::ops::DivAssign for Rect {
+    fn div_assign(&mut self, rhs: Self) {
+        self.min /= rhs.min;
+        self.max /= rhs.max;
+    }
+}

crates/lyra-math/src/u32/mod.rs

@@ -0,0 +1,2 @@
+mod rect;
+pub use rect::*;

crates/lyra-math/src/u32/rect.rs

@@ -0,0 +1,90 @@
+use glam::UVec2;
+
+#[repr(C)]
+#[derive(Debug, Clone, Copy, Default, PartialEq, bytemuck::Pod, bytemuck::Zeroable)]
+pub struct URect {
+    pub min: UVec2,
+    pub max: UVec2,
+}
+
+impl URect {
+    pub const ZERO: URect = URect { min: UVec2::ZERO, max: UVec2::ZERO };
+
+    pub fn new(x1: u32, y1: u32, x2: u32, y2: u32) -> Self {
+        Self {
+            min: UVec2::new(x1, y1),
+            max: UVec2::new(x2, y2),
+        }
+    }
+
+    pub fn from_vec(min: UVec2, max: UVec2) -> Self {
+        Self {
+            min,
+            max
+        }
+    }
+
+    pub fn dimensions(&self) -> UVec2 {
+        self.max - self.min
+    }
+}
+
+impl std::ops::Add for URect {
+    type Output = URect;
+
+    fn add(self, rhs: Self) -> Self::Output {
+        URect::from_vec(self.min + rhs.min, self.max + rhs.max)
+    }
+}
+
+impl std::ops::AddAssign for URect {
+    fn add_assign(&mut self, rhs: Self) {
+        self.min += rhs.min;
+        self.max += rhs.max;
+    }
+}
+
+impl std::ops::Sub for URect {
+    type Output = URect;
+
+    fn sub(self, rhs: Self) -> Self::Output {
+        URect::from_vec(self.min - rhs.min, self.max - rhs.max)
+    }
+}
+
+impl std::ops::SubAssign for URect {
+    fn sub_assign(&mut self, rhs: Self) {
+        self.min -= rhs.min;
+        self.max -= rhs.max;
+    }
+}
+
+impl std::ops::Mul for URect {
+    type Output = URect;
+
+    fn mul(self, rhs: Self) -> Self::Output {
+        URect::from_vec(self.min * rhs.min, self.max * rhs.max)
+    }
+}
+
+impl std::ops::MulAssign for URect {
+    fn mul_assign(&mut self, rhs: Self) {
+        self.min *= rhs.min;
+        self.max *= rhs.max;
+    }
+}
+
+impl std::ops::Div for URect {
+    type Output = URect;
+
+    fn div(self, rhs: Self) -> Self::Output {
+        URect::from_vec(self.min / rhs.min, self.max / rhs.max)
+    }
+}
+
+impl std::ops::DivAssign for URect {
+    fn div_assign(&mut self, rhs: Self) {
+        self.min /= rhs.min;
+        self.max /= rhs.max;
+    }
+}

crates/lyra-reflect/src/impls/impl_math.rs

@@ -6,7 +6,17 @@ use crate::{lyra_engine, Enum, Method, Reflect, ReflectMut, ReflectRef};
 impl_reflect_simple_struct!(lyra_math::Vec2, fields(x = f32, y = f32));
 impl_reflect_simple_struct!(lyra_math::Vec3, fields(x = f32, y = f32, z = f32));
 impl_reflect_simple_struct!(lyra_math::Vec4, fields(x = f32, y = f32, z = f32, w = f32));
+impl_reflect_simple_struct!(lyra_math::UVec2, fields(x = u32, y = u32));
+impl_reflect_simple_struct!(lyra_math::UVec3, fields(x = u32, y = u32, z = u32));
+impl_reflect_simple_struct!(lyra_math::UVec4, fields(x = u32, y = u32, z = u32, w = u32));
+impl_reflect_simple_struct!(lyra_math::IVec2, fields(x = i32, y = i32));
+impl_reflect_simple_struct!(lyra_math::IVec3, fields(x = i32, y = i32, z = i32));
+impl_reflect_simple_struct!(lyra_math::IVec4, fields(x = i32, y = i32, z = i32, w = i32));
+
 impl_reflect_simple_struct!(lyra_math::Quat, fields(x = f32, y = f32, z = f32, w = f32));
+impl_reflect_simple_struct!(lyra_math::Rect, fields(min = lyra_math::Vec2, max = lyra_math::Vec2));
+impl_reflect_simple_struct!(lyra_math::URect, fields(min = lyra_math::UVec2, max = lyra_math::UVec2));
+impl_reflect_simple_struct!(lyra_math::IRect, fields(min = lyra_math::IVec2, max = lyra_math::IVec2));
 
 impl_reflect_simple_struct!(
     lyra_math::Transform,

crates/lyra-resource/src/dep_state.rs

@@ -1,5 +1,3 @@
-use std::sync::Arc;
-
 use crate::{loader::LoaderError, ResourceState, UntypedResHandle};
 
 #[derive(Clone)]
@@ -9,7 +7,7 @@ pub enum DependencyState {
         /// The resource that had the error.
         handle: UntypedResHandle,
         /// The error that the resource ran into when loading.
-        error: Arc<LoaderError>,
+        error: LoaderError,
     },
     Ready,
 }

crates/lyra-resource/src/lib.rs

@@ -15,8 +15,6 @@ pub mod loader;
 mod world_ext;
 pub use world_ext::*;
 
-pub(crate) mod util;
-
 pub use crossbeam::channel as channel;
 pub use notify;
 

crates/lyra-resource/src/loader/image.rs

@@ -10,7 +10,7 @@ use super::{LoaderError, PinedBoxLoaderFuture, ResourceLoader};
 
 impl From<ImageError> for LoaderError {
     fn from(value: ImageError) -> Self {
-        LoaderError::DecodingError(value.into())
+        LoaderError::DecodingError(Arc::new(value.into()))
     }
 }
 
@@ -75,8 +75,8 @@ impl ResourceLoader for ImageLoader {
             // load the image and construct Resource<Texture>
             let image = image::load_from_memory(&buf)
                 .map_err(|e| match e {
-                    ImageError::IoError(e) => LoaderError::IoError(e),
-                    _ => LoaderError::DecodingError(e.into()),
+                    ImageError::IoError(e) => LoaderError::IoError(Arc::new(e)),
+                    _ => LoaderError::DecodingError(Arc::new(e.into())),
                 })?;
             let image = Image::from(image);
             let image = Box::new(image) as Box<dyn ResourceData>;
@@ -89,8 +89,8 @@ impl ResourceLoader for ImageLoader {
         Box::pin(async move {
             let image = image::load_from_memory(&bytes[offset..(length-offset)])
                 .map_err(|e| match e {
-                    ImageError::IoError(e) => LoaderError::IoError(e),
-                    _ => LoaderError::DecodingError(e.into()),
+                    ImageError::IoError(e) => LoaderError::IoError(Arc::new(e)),
+                    _ => LoaderError::DecodingError(Arc::new(e.into())),
                 })?;
             let image = Image::from(image);
             debug!("Finished loading image ({} bytes)", length);

crates/lyra-resource/src/loader/mod.rs

@@ -7,7 +7,7 @@ use thiserror::Error;
 
 use crate::{resource_manager::ResourceStorage, ResourceData, ResourceManager};
 
-#[derive(Error, Debug)]
+#[derive(Error, Debug, Clone)]
 pub enum LoaderError {
     #[error("A malformed path was given: '{0}'")]
     InvalidPath(String),
@@ -16,16 +16,22 @@ pub enum LoaderError {
     UnsupportedExtension(String),
     
     #[error("IOError: '{0}'")]
-    IoError(io::Error),
+    IoError(Arc<io::Error>),
 
     // From is implemented for this field in each loader module
     #[error("Decoding error: '{0}'")]
-    DecodingError(anyhow::Error),
+    DecodingError(Arc<anyhow::Error>),
 }
 
 impl From<io::Error> for LoaderError {
     fn from(value: io::Error) -> Self {
-        LoaderError::IoError(value)
+        LoaderError::IoError(Arc::new(value))
+    }
+}
+
+impl From<anyhow::Error> for LoaderError {
+    fn from(value: anyhow::Error) -> Self {
+        LoaderError::DecodingError(Arc::new(value))
     }
 }
 

crates/lyra-resource/src/resource.rs

@@ -48,7 +48,7 @@ pub trait ResourceData: Send + Sync + Any + 'static {
 
 pub enum ResourceState {
     Loading,
-    Error(Arc<LoaderError>),
+    Error(LoaderError),
     Ready(Box<dyn ResourceData>),
 }
 
@@ -165,7 +165,7 @@ impl UntypedResHandle {
         matches!(d.state, ResourceState::Ready(_))
     }
 
-    pub fn get_error(&self) -> Option<Arc<LoaderError>> {
+    pub fn get_error(&self) -> Option<LoaderError> {
         let d = self.read();
 
         match &d.state {
@@ -197,14 +197,15 @@ impl UntypedResHandle {
     /// 
     /// This blocks the thread without consuming CPU time; its backed by a
     /// [`Condvar`](std::sync::Condvar).
-    pub fn wait_for_load(&self) {
-        self.wait_for_load_timeout_option_impl(None);
+    pub fn wait_for_load(&self) -> Result<(), LoaderError> {
+        self.wait_for_load_timeout_option_impl(None)?;
+        Ok(())
     }
 
     /// Does the same as [`UntypedResHandle::wait_for_load`] but has a timeout.
     /// 
     /// Returns true if the resource was loaded before hitting the timeout.
-    pub fn wait_for_load_timeout(&self, timeout: Duration) -> bool {
+    pub fn wait_for_load_timeout(&self, timeout: Duration) -> Result<bool, LoaderError> {
         self.wait_for_load_timeout_option_impl(Some(timeout))
     }
 
@@ -212,41 +213,48 @@ impl UntypedResHandle {
     /// 
     /// This blocks the thread without consuming CPU time; its backed by a
     /// [`Condvar`](std::sync::Condvar).
-    pub fn wait_recurse_dependencies_load(&self) {
-        self.wait_recurse_dependencies_load_timeout_option_impl(None);
+    pub fn wait_recurse_dependencies_load(&self) -> Result<(), LoaderError> {
+        self.wait_recurse_dependencies_load_timeout_option_impl(None)?;
+        Ok(())
     }
 
     /// Does the same as [`UntypedResHandle::wait_recurse_dependencies_load`] but has a timeout.
     /// 
     /// Returns true if the resource was loaded before hitting the timeout.
-    pub fn wait_recurse_dependencies_load_timeout(&self, timeout: Duration) -> bool {
+    pub fn wait_recurse_dependencies_load_timeout(&self, timeout: Duration) -> Result<bool, LoaderError> {
         self.wait_recurse_dependencies_load_timeout_option_impl(Some(timeout))
     }
 
-    fn wait_for_load_timeout_option_impl(&self, timeout: Option<Duration>) -> bool {
+    fn wait_for_load_timeout_option_impl(&self, timeout: Option<Duration>) -> Result<bool, LoaderError> {
         let d = self.read();
-        
         if matches!(d.state, ResourceState::Ready(_)) {
-            return true;
+            return Ok(true);
         }
 
         let cv = d.condvar.clone();
+        // MUST DROP to avoid deadlock
         drop(d);
 
         let l = cv.0.lock().unwrap();
 
         if let Some(timeout) = timeout {
-            let (_unused, timeout) = cv.1.wait_timeout(l, timeout).unwrap();
-            !timeout.timed_out()
+            let (_unused, _) = cv.1.wait_timeout(l, timeout).unwrap();
         } else {
             let _unused = cv.1.wait(l).unwrap();
-            true
+        }
+
+        let d = self.read();
+        match &d.state {
+            // it will still be loading if the timeout is exceeded
+            ResourceState::Loading => Ok(false),
+            ResourceState::Error(e) => Err(e.clone()),
+            ResourceState::Ready(_) => Ok(true),
         }
     }
 
-    fn wait_recurse_dependencies_load_timeout_option_impl(&self, timeout: Option<Duration>) -> bool {
-        if !self.wait_for_load_timeout_option_impl(timeout) {
-            return false;
+    fn wait_recurse_dependencies_load_timeout_option_impl(&self, timeout: Option<Duration>) -> Result<bool, LoaderError> {
+        if !self.wait_for_load_timeout_option_impl(timeout)? {
+            return Ok(false);
         }
 
         let res = self.read();
@@ -257,13 +265,13 @@ impl UntypedResHandle {
                 // waiting for some resources and finish early.
                 while self.recurse_dependency_state().is_loading() {
                     for dep in data.recur_dependencies() {
-                        if !dep.wait_for_load_timeout_option_impl(timeout) {
-                            return false;
+                        if !dep.wait_for_load_timeout_option_impl(timeout)? {
+                            return Ok(false);
                         }
                     }
                 }
                 
-                true
+                Ok(true)
             },
             // self.wait_for_load at the start ensures that the state is ready
             _ => unreachable!()
@@ -315,6 +323,12 @@ pub struct ResHandle<T: ResourceData> {
     _marker: PhantomData<T>,
 }
 
+impl<T: ResourceData> Default for ResHandle<T> {
+    fn default() -> Self {
+        Self::new_loading(None)
+    }
+}
+
 impl<T: ResourceData> Clone for ResHandle<T> {
     fn clone(&self) -> Self {
         Self {
@@ -591,7 +605,7 @@ mod tests {
         assert!(state.is_loading());
 
         // this will take a bit
-        res.wait_recurse_dependencies_load();
+        res.wait_recurse_dependencies_load().unwrap();
 
         let state = res.recurse_dependency_state();
         assert!(!state.is_loading());

crates/lyra-resource/src/resource_manager.rs

@@ -166,7 +166,8 @@ impl ResourceManager {
                             }
                             Err(err) => {
                                 let mut d = untyped.write();
-                                d.state = ResourceState::Error(Arc::new(err));
+                                d.state = ResourceState::Error(err);
+                                d.condvar.1.notify_all();
                             }
                         }
                     });
@@ -183,6 +184,14 @@ impl ResourceManager {
         }
     }
 
+    /// Store a new resource, returning its handle.
+    pub fn store_new<T: ResourceData>(&self, data: T) -> ResHandle<T> {
+        let handle = ResHandle::new_ready(None, data);
+        let mut state = self.state_mut();
+        state.resources.insert(handle.uuid().to_string(), Arc::new(handle.clone()));
+        handle
+    }
+
     /// Store a resource using its uuid.
     /// 
     /// The resource cannot be requested with [`ResourceManager::request`], it can only be 
@@ -236,10 +245,12 @@ impl ResourceManager {
                     Ok(data) => {
                         let mut d = thand.write();
                         d.state = ResourceState::Ready(data);
+                        d.condvar.1.notify_all();
                     }
                     Err(err) => {
                         let mut d = thand.write();
-                        d.state = ResourceState::Error(Arc::new(err));
+                        d.state = ResourceState::Error(err);
+                        d.condvar.1.notify_all();
                     }
                 }
             });
@@ -273,6 +284,15 @@ impl ResourceManager {
         }
     }
 
+    pub fn load_str<T>(&self, ident: &str, mime_type: &str, text: &str) -> Result<ResHandle<T>, RequestError>
+    where
+        T: ResourceData
+    {
+        let bytes = text.as_bytes().to_vec();
+        let len = bytes.len();
+        self.load_bytes(ident, mime_type, bytes, 0, len)
+    }
+
     /// Start watching a path for changes. Returns a mspc channel that will send events
     pub fn watch(&self, path: &str, recursive: bool) -> notify::Result<Receiver<Result<Vec<DebouncedEvent>, Vec<notify::Error>>>> {
         let (send, recv) = crossbeam::channel::bounded(15);
@@ -358,7 +378,7 @@ impl ResourceManager {
                     }
                     Err(err) => {
                         let mut d = thand.write();
-                        d.state = ResourceState::Error(Arc::new(err));
+                        d.state = ResourceState::Error(err);
                     }
                 }
             });
@@ -370,7 +390,7 @@ impl ResourceManager {
 
 #[cfg(test)]
 pub mod tests {
-    use std::{io, ops::Deref};
+    use std::io;
 
     use instant::Instant;
 
@@ -420,8 +440,7 @@ pub mod tests {
         let res = man.request::<Image>(&get_image("squiggles.png")).unwrap();
         assert!(!res.is_loaded());
 
-        res.wait_for_load();
-        //busy_wait_resource(&res, 10.0);
+        res.wait_for_load().unwrap();
 
         // shouldn't panic because of the loop
         res.data_ref().unwrap();
@@ -455,7 +474,7 @@ pub mod tests {
                 // make sure the error is NotFound
                 //RequestError::Loader(LoaderError::IoError(e)) if e.kind() == io::ErrorKind::NotFound => true,
                 ResourceState::Error(err) => {
-                    match err.deref() {
+                    match err {
                         LoaderError::IoError(e) if e.kind() == io::ErrorKind::NotFound => true,
                         _ => false,
                     }

crates/lyra-resource/src/util.rs

@@ -1 +0,0 @@
-use base64::Engine;

crates/lyra-scripting/src/lua/providers/ecs.rs

@@ -17,7 +17,8 @@ impl ScriptApiProvider for LyraEcsApiProvider {
         world.register_lua_wrapper::<LuaActionHandler>();
         world.register_lua_wrapper::<LuaWindow>();
         
-        world.register_lua_convert_component::<LuaCamera>("Camera");
+        // TODO: expose camera
+        // world.register_lua_convert_component::<LuaCamera>("Camera");
         world.register_lua_convert_component::<LuaFreeFlyCamera>("FreeFlyCamera");
         world.register_lua_convert_component::<LuaWorldTransform>("WorldTransform");
 
@@ -54,7 +55,6 @@ impl ScriptApiProvider for LyraEcsApiProvider {
         globals.set("TickOfQuery", ctx.create_proxy::<LuaTickOfQuery>()?)?;
         globals.set("OptionalQuery", ctx.create_proxy::<LuaOptionalQuery>()?)?;
 
-        expose_comp_table_wrapper::<LuaCamera>(&ctx, &globals, "Camera")?;
         expose_comp_table_wrapper::<LuaFreeFlyCamera>(&ctx, &globals, "FreeFlyCamera")?;
         expose_comp_table_wrapper::<LuaWorldTransform>(&ctx, &globals, "WorldTransform")?;
         expose_table_wrapper::<LuaDeviceEvent>(&ctx, &globals, "DeviceEvent")?;

crates/lyra-scripting/src/lua/wrappers/camera.rs

@@ -1,19 +1,66 @@
 use crate::{
     lua::{
-        wrappers::{LuaAngle, LuaTransform},
-        LuaWrapper
+        wrappers::LuaAngle,
+        LuaWrapper,
     },
     ScriptBorrow,
 };
-use lyra_game::{render::camera::CameraProjectionMode, scene::CameraComponent};
-use lyra_reflect::Enum;
+use lyra_game::{
+    render::camera::{CameraProjectionMode, OrthographicProjection, PerspectiveProjection},
+    scene::CameraComponent,
+};
 use lyra_scripting_derive::to_lua_convert;
 
-fn projection_mode_from_str(s: &str) -> Option<CameraProjectionMode> {
-    match s {
-        "perspective" => Some(CameraProjectionMode::Perspective),
-        "orthographic" => Some(CameraProjectionMode::Orthographic),
-        _ => None,
+fn projection_as_table(lua: &mlua::Lua, projection: CameraProjectionMode) -> mlua::Result<mlua::Table> {
+    let table = lua.create_table()?;
+
+    match projection {
+        CameraProjectionMode::Perspective(proj) => {
+            table.set("type", "perspective")?;
+            table.set("fov", LuaAngle(proj.fov))?;
+            table.set("znear", proj.znear)?;
+            table.set("zfar", proj.zfar)?;
+        },
+        CameraProjectionMode::Orthographic(proj) => {
+            table.set("type", "orthographic")?;
+            table.set("scale", proj.scale)?;
+            table.set("znear", proj.znear)?;
+            table.set("zfar", proj.zfar)?;
+        },
+    }
+
+    Ok(table)
+}
+
+fn projection_from_table(t: &mlua::Table) -> mlua::Result<CameraProjectionMode> {
+    let ty: String = t.get("type")?;
+    let ty = ty.as_str();
+
+    let znear: f32 = t.get("znear")?;
+    let zfar: f32 = t.get("zfar")?;
+
+    match ty {
+        "perspective" => {
+            let fov: LuaAngle = t.get("fov")?;
+            Ok(CameraProjectionMode::Perspective(PerspectiveProjection {
+                fov: fov.0,
+                znear,
+                zfar,
+            }))
+        }
+        "orthographic" => {
+            let scale: f32 = t.get("scale")?;
+            Ok(CameraProjectionMode::Orthographic(OrthographicProjection {
+                scale,
+                znear,
+                zfar,
+            }))
+        }
+        _ => Err(mlua::Error::FromLuaConversionError {
+            from: "Table",
+            to: "CameraProjection".into(),
+            message: Some(format!("unknown projection type: '{}'", ty)),
+        }),
     }
 }
 
@@ -27,20 +74,16 @@ to_lua_convert!(
     // Reflection type, can be 'component' or 'resource'
     reflect=component,
     fields={
-        transform: wrap(LuaTransform),
-        fov: wrap(LuaAngle),
         (
-            mode,
-            // Get the table from the value, result must be `CameraProjectionMode`
+            projection,
             get={
-                let mode: String = table.get("mode")?;
-                projection_mode_from_str(&mode).unwrap()
+                let p: mlua::Table = table.get("projection")?;
+                projection_from_table(&p)?
+                
             },
-            // Get the value from self, result must be the type in Lua, here its `String`.
             set={
-                self.mode.variant_name().to_lowercase()
-            }
-        ),
-        debug: bool
+                projection_as_table(lua, self.projection)?
+            },
+        )
     }
 );

crates/lyra-scripting/src/lua/wrappers/free_fly_camera.rs

@@ -1,10 +1,10 @@
 use crate::{lua::LuaWrapper, ScriptBorrow};
-use lyra_game::scene::FreeFlyCamera;
+use lyra_game::scene::FreeFly3dCamera;
 use lyra_scripting_derive::to_lua_convert;
 
 to_lua_convert!(
     // Struct that is being wrapped
-    FreeFlyCamera,
+    FreeFly3dCamera,
     // Reflection type, can be 'component' or 'resource'
     reflect=component,
     fields={

crates/lyra-scripting/src/lua/wrappers/mod.rs

@@ -13,9 +13,6 @@ pub use delta_time::*;
 mod window;
 pub use window::*;
 
-mod camera;
-pub use camera::*;
-
 mod free_fly_camera;
 pub use free_fly_camera::*;
 

examples/2d/src/main.rs

@@ -1,13 +1,12 @@
 use lyra_engine::{
-    assets::ResourceManager, gltf::Gltf, ecs::query::View, game::App, input::{
+    assets::{Image, ResourceManager}, ecs::query::{Res, ResMut, View}, game::App, gltf::Gltf, input::{
         Action, ActionHandler, ActionKind, ActionMapping, ActionMappingId, ActionSource,
         InputActionPlugin, KeyCode, LayoutId,
-    }, math::{self, Transform, Vec3}, render::light::directional::DirectionalLight, scene::{
-        CameraComponent, FreeFlyCamera, FreeFlyCameraPlugin, WorldTransform,
-        ACTLBL_LOOK_LEFT_RIGHT, ACTLBL_LOOK_ROLL, ACTLBL_LOOK_UP_DOWN,
-        ACTLBL_MOVE_FORWARD_BACKWARD, ACTLBL_MOVE_LEFT_RIGHT, ACTLBL_MOVE_UP_DOWN,
-    }, winit::WindowOptions
+    }, math::{self, Rect, Transform, URect, UVec2, Vec2, Vec3}, render::light::directional::DirectionalLight, scene::{
+        system_update_world_transforms, Camera2dBundle, CameraProjection, OrthographicProjection, ScaleMode, TopDown2dCamera, TopDown2dCameraPlugin, WorldTransform, ACTLBL_LOOK_LEFT_RIGHT, ACTLBL_LOOK_ROLL, ACTLBL_LOOK_UP_DOWN, ACTLBL_MOVE_FORWARD_BACKWARD, ACTLBL_MOVE_LEFT_RIGHT, ACTLBL_MOVE_UP_DOWN
+    }, sprite::{self, AtlasSprite, Pivot, Sprite, TextureAtlas}, DeltaTime
 };
+use tracing::debug;
 
 #[async_std::main]
 async fn main() {
@@ -85,11 +84,19 @@ async fn main() {
         .with_plugin(setup_scene_plugin)
         .with_plugin(action_handler_plugin)
         //.with_plugin(camera_debug_plugin)
-        .with_plugin(FreeFlyCameraPlugin);
+        .with_plugin(TopDown2dCameraPlugin)
+        .with_system(
+            "system_update_world_transforms",
+            system_update_world_transforms,
+            &[],
+        );
     a.run();
 }
 
 fn setup_scene_plugin(app: &mut App) {
+    app.add_resource(Timer(0.0));
+    app.with_system("sprite_change", sprite_change, &[]);
+
     let world = &mut app.world;
     let resman = world.get_resource_mut::<ResourceManager>().unwrap();
 
@@ -111,14 +118,36 @@ fn setup_scene_plugin(app: &mut App) {
         .request::<Gltf>("../assets/cube-texture-embedded.gltf")
         .unwrap();
 
-    cube_gltf.wait_recurse_dependencies_load();
+    cube_gltf.wait_recurse_dependencies_load().unwrap();
     let cube_mesh = &cube_gltf.data_ref().unwrap().scenes[0];
+
+    let image = resman.request::<Image>("../assets/Egg_item.png").unwrap();
+    image.wait_recurse_dependencies_load().unwrap();
+
+    let soldier = resman.request::<Image>("../assets/tiny_rpg_characters/Characters(100x100)/Soldier/Soldier/Soldier.png").unwrap();
+    soldier.wait_recurse_dependencies_load().unwrap();
+
+    let atlas = resman.store_new(TextureAtlas {
+        texture: soldier,
+        grid_offset: UVec2::ZERO,
+        grid_size: UVec2::new(9, 7),
+        cell_size: UVec2::new(100, 100),
+        sprite_color: Vec3::ONE,
+        pivot: Pivot::default(),
+    });
+    let sprite = AtlasSprite::from_atlas_index(atlas, 9);
+
     drop(resman);
 
     world.spawn((
-        cube_mesh.clone(),
+        /* Sprite {
+            texture: sprite,
+            color: Vec3::ONE,
+            pivot: sprite::Pivot::Center,
+        }, */
+        sprite,
         WorldTransform::default(),
-        Transform::from_xyz(0.0, 0.0, -2.0),
+        Transform::from_xyz(0.0, 0.0, -10.0),
     ));
 
     {
@@ -136,7 +165,51 @@ fn setup_scene_plugin(app: &mut App) {
         ));
     }
 
-    let mut camera = CameraComponent::new_2d();
-    camera.transform.translation += math::Vec3::new(0.0, 0.0, 5.5);
-    world.spawn((camera, FreeFlyCamera::default()));
+    world.spawn((
+        Camera2dBundle {
+            projection: CameraProjection::Orthographic(OrthographicProjection {
+                scale_mode: ScaleMode::Height(180.0),
+                ..Default::default()
+            }),
+            ..Default::default()
+        },
+        Transform::from_xyz(0.0, 0.0, 0.0),
+        TopDown2dCamera {
+            zoom_speed: Some(0.2),
+            speed: 14.0,
+            ..Default::default()
+        }
+    ));
+}
+
+#[derive(Clone, Copy, Debug)]
+struct Timer(f32);
+
+fn sprite_change(mut timer: ResMut<Timer>, dt: Res<DeltaTime>, view: View<&mut AtlasSprite>) -> anyhow::Result<()> {
+    timer.0 += **dt;
+
+    const TIME: f32 = 0.1;
+    if timer.0 >= TIME {
+        //println!("{t} seconds timer triggered, moving sprite");
+        timer.0 = 0.0;
+        
+        for mut a in view.iter() {
+            //println!("a.sprite: {:?}", a.sprite);
+
+            if a.sprite.max.x >= 800 {
+                a.sprite = URect {
+                    min: UVec2::new(0, 100),
+                    max: UVec2::new(100, 200),
+                };
+                //println!("restart!");
+            } else {
+                a.sprite += URect {
+                    min: UVec2::new(100, 0),
+                    max: UVec2::new(100, 0),
+                };
+            }
+        }
+    }
+
+    Ok(())
 }

examples/assets/.gitignore

@@ -0,0 +1 @@
+Egg_item.png

examples/assets/tiny_rpg_characters/.gitignore

@@ -0,0 +1,3 @@
+*
+!.gitignore
+!source.txt

examples/assets/tiny_rpg_characters/source.txt

@@ -0,0 +1 @@
+https://zerie.itch.io/tiny-rpg-character-asset-pack

examples/fixed-timestep-rotating-model/src/main.rs

@@ -1,25 +1,16 @@
 use std::ptr::NonNull;
 
 use lyra_engine::{
-    assets::ResourceManager, gltf::Gltf,
-    ecs::{
+    assets::ResourceManager, ecs::{
         query::{Res, View},
         system::{BatchedSystem, Criteria, CriteriaSchedule, IntoSystem},
         World,
-    },
-    game::App,
-    input::{
+    }, game::App, gltf::Gltf, input::{
         Action, ActionHandler, ActionKind, ActionMapping, ActionMappingId, ActionSource,
         InputActionPlugin, KeyCode, LayoutId, MouseAxis, MouseInput,
-    },
-    math::{self, Transform, Vec3},
-    render::light::directional::DirectionalLight,
-    scene::{
-        CameraComponent, FreeFlyCamera, FreeFlyCameraPlugin, WorldTransform,
-        ACTLBL_LOOK_LEFT_RIGHT, ACTLBL_LOOK_ROLL, ACTLBL_LOOK_UP_DOWN,
-        ACTLBL_MOVE_FORWARD_BACKWARD, ACTLBL_MOVE_LEFT_RIGHT, ACTLBL_MOVE_UP_DOWN,
-    },
-    DeltaTime,
+    }, math::{self, Transform, Vec3}, render::light::directional::DirectionalLight, scene::{
+        CameraBundle, FreeFly3dCamera, FreeFlyCameraPlugin, WorldTransform, ACTLBL_LOOK_LEFT_RIGHT, ACTLBL_LOOK_ROLL, ACTLBL_LOOK_UP_DOWN, ACTLBL_MOVE_FORWARD_BACKWARD, ACTLBL_MOVE_LEFT_RIGHT, ACTLBL_MOVE_UP_DOWN
+    }, DeltaTime
 };
 use tracing::info;
 
@@ -135,9 +126,11 @@ fn setup_scene_plugin(app: &mut App) {
         ));
     }
 
-    let mut camera = CameraComponent::new_3d();
-    camera.transform.translation += math::Vec3::new(0.0, 0.0, 1.5);
-    world.spawn((camera, FreeFlyCamera::default()));
+    world.spawn((
+        CameraBundle::default(),
+        Transform::from_xyz(0.0, 0.0, 1.5),
+        FreeFly3dCamera::default(),
+    ));
 
     let fps_counter = |counter: Res<fps_counter::FPSCounter>,
             delta: Res<DeltaTime>| -> anyhow::Result<()> {

examples/lua-scripting/src/main.rs

@@ -1,9 +1,9 @@
 use lyra_engine::{
-    assets::ResourceManager, gltf::Gltf, game::App, input::{
+    assets::ResourceManager, game::App, gltf::Gltf, input::{
         Action, ActionHandler, ActionKind, ActionMapping, ActionMappingId, ActionSource,
         InputActionPlugin, KeyCode, LayoutId, MouseAxis, MouseInput,
     }, math::{self, Transform, Vec3}, render::light::directional::DirectionalLight, scene::{
-        self, CameraComponent, FreeFlyCamera, FreeFlyCameraPlugin, WorldTransform, ACTLBL_LOOK_LEFT_RIGHT, ACTLBL_LOOK_ROLL, ACTLBL_LOOK_UP_DOWN, ACTLBL_MOVE_FORWARD_BACKWARD, ACTLBL_MOVE_LEFT_RIGHT, ACTLBL_MOVE_UP_DOWN
+        self, CameraBundle, FreeFly3dCamera, FreeFlyCameraPlugin, WorldTransform, ACTLBL_LOOK_LEFT_RIGHT, ACTLBL_LOOK_ROLL, ACTLBL_LOOK_UP_DOWN, ACTLBL_MOVE_FORWARD_BACKWARD, ACTLBL_MOVE_LEFT_RIGHT, ACTLBL_MOVE_UP_DOWN
     }, script::{lua::{LuaScript, LuaScriptingPlugin}, Script, ScriptList}
 };
 
@@ -125,9 +125,11 @@ fn setup_scene_plugin(app: &mut App) {
         ));
     }
 
-    let mut camera = CameraComponent::new_3d();
-    camera.transform.translation += math::Vec3::new(0.0, 0.0, 5.5);
-    world.spawn((camera, FreeFlyCamera::default()));
+    world.spawn((
+        CameraBundle::default(),
+        Transform::from_xyz(0.0, 0.0, 5.5),
+        FreeFly3dCamera::default(),
+    ));
 }
 
 fn setup_script_plugin(app: &mut App) {

examples/many-lights/src/main.rs

@@ -1,4 +1,4 @@
-use lyra_engine::{assets::ResourceManager, gltf::Gltf, ecs::query::{Res, View}, game::App, input::{Action, ActionHandler, ActionKind, ActionMapping, ActionMappingId, ActionSource, InputActionPlugin, KeyCode, LayoutId, MouseAxis, MouseInput}, math::{self, Quat, Transform, Vec3}, render::light::{directional::DirectionalLight, PointLight}, scene::{CameraComponent, FreeFlyCamera, FreeFlyCameraPlugin, ACTLBL_LOOK_LEFT_RIGHT, ACTLBL_LOOK_ROLL, ACTLBL_LOOK_UP_DOWN, ACTLBL_MOVE_FORWARD_BACKWARD, ACTLBL_MOVE_LEFT_RIGHT, ACTLBL_MOVE_UP_DOWN}, DeltaTime};
+use lyra_engine::{assets::ResourceManager, ecs::query::Res, game::App, gltf::Gltf, input::{Action, ActionHandler, ActionKind, ActionMapping, ActionMappingId, ActionSource, InputActionPlugin, KeyCode, LayoutId, MouseAxis, MouseInput}, math::{self, Quat, Transform, Vec3}, render::light::{directional::DirectionalLight, PointLight}, scene::{CameraBundle, FreeFly3dCamera, FreeFlyCameraPlugin, ACTLBL_LOOK_LEFT_RIGHT, ACTLBL_LOOK_ROLL, ACTLBL_LOOK_UP_DOWN, ACTLBL_MOVE_FORWARD_BACKWARD, ACTLBL_MOVE_LEFT_RIGHT, ACTLBL_MOVE_UP_DOWN}, DeltaTime};
 use rand::Rng;
 use tracing::info;
 
@@ -95,7 +95,6 @@ async fn main() {
     app.with_plugin(lyra_engine::DefaultPlugins);
     app.with_plugin(setup_scene_plugin);
     app.with_plugin(action_handler_plugin);
-    app.with_plugin(camera_debug_plugin);
     app.with_plugin(FreeFlyCameraPlugin);
     app.run();
 }
@@ -184,26 +183,15 @@ fn setup_scene_plugin(app: &mut App) {
         ));
     }
 
-    let mut camera = CameraComponent::new_3d();
-    // these values were taken by manually positioning the camera in the scene.
-    camera.transform = Transform::new(
+    world.spawn((
+        CameraBundle::default(),
+        // these values were taken by manually positioning the camera in the scene
+        // and printing the position to console.
+        Transform::new(
             Vec3::new(-10.0, 0.94, -0.28),
             Quat::from_xyzw(0.03375484, -0.7116095, 0.0342693, 0.70092666),
-        Vec3::ONE
-    );
-    world.spawn(( camera, FreeFlyCamera::default() ));
-}
-
-fn camera_debug_plugin(app: &mut App) {
-    let sys = |handler: Res<ActionHandler>, view: View<&mut CameraComponent>| -> anyhow::Result<()> {
-        if let Some(true) = handler.was_action_just_pressed("Debug") {
-            for mut cam in view.into_iter() {
-                cam.debug = !cam.debug;
-            }
-        }
-
-        Ok(())
-    };
-
-    app.with_system("camera_debug_trigger", sys, &[]);
+            Vec3::ONE,
+        ),
+        FreeFly3dCamera::default(),
+    ));
 }

examples/shadows/src/main.rs

@@ -1,6 +1,7 @@
 use lyra_engine::{
-    assets::ResourceManager, gltf::Gltf,
+    assets::ResourceManager,
     game::App,
+    gltf::Gltf,
     input::{
         Action, ActionHandler, ActionKind, ActionMapping, ActionMappingId, ActionSource,
         InputActionPlugin, KeyCode, LayoutId, MouseAxis, MouseInput,
@@ -11,9 +12,9 @@ use lyra_engine::{
         light::{directional::DirectionalLight, SpotLight},
     },
     scene::{
-        CameraComponent, FreeFlyCamera, FreeFlyCameraPlugin, WorldTransform,
-        ACTLBL_LOOK_LEFT_RIGHT, ACTLBL_LOOK_ROLL, ACTLBL_LOOK_UP_DOWN,
-        ACTLBL_MOVE_FORWARD_BACKWARD, ACTLBL_MOVE_LEFT_RIGHT, ACTLBL_MOVE_UP_DOWN,
+        CameraBundle, FreeFly3dCamera, FreeFlyCameraPlugin, WorldTransform, ACTLBL_LOOK_LEFT_RIGHT,
+        ACTLBL_LOOK_ROLL, ACTLBL_LOOK_UP_DOWN, ACTLBL_MOVE_FORWARD_BACKWARD,
+        ACTLBL_MOVE_LEFT_RIGHT, ACTLBL_MOVE_UP_DOWN,
     },
 };
 
@@ -115,13 +116,6 @@ fn setup_scene_plugin(app: &mut App) {
         Transform::from_xyz(0.0, -5.0, -2.0),
     )); */
 
-    let cube_gltf = resman
-        .request::<Gltf>("../assets/cube-texture-embedded.gltf")
-        .unwrap();
-
-    cube_gltf.wait_recurse_dependencies_load();
-    let cube_mesh = &cube_gltf.data_ref().unwrap().scenes[0];
-
     let palm_tree_platform_gltf = resman
         .request::<Gltf>("../assets/shadows-platform-palmtree.glb")
         .unwrap();
@@ -214,8 +208,12 @@ fn setup_scene_plugin(app: &mut App) {
             Vec3::new(4.0 - 1.43, -13.0, 0.0),
             //Vec3::new(-5.0, 1.0, -0.28),
             //Vec3::new(-10.0, 0.94, -0.28),
-        
-            Quat::from_euler(math::EulerRot::XYZ, 0.0, math::Angle::Degrees(-45.0).to_radians(), 0.0),
+            Quat::from_euler(
+                math::EulerRot::XYZ,
+                0.0,
+                math::Angle::Degrees(-45.0).to_radians(),
+                0.0,
+            ),
             Vec3::new(0.15, 0.15, 0.15),
         );
 
@@ -238,10 +236,8 @@ fn setup_scene_plugin(app: &mut App) {
         ));
     }
 
-    let mut camera = CameraComponent::new_3d();
-    camera.transform.translation = math::Vec3::new(-1.0, -10.0, -1.5);
-    camera.transform.rotate_x(math::Angle::Degrees(-27.0));
-    camera.transform.rotate_y(math::Angle::Degrees(-90.0));
-
-    world.spawn((camera, FreeFlyCamera::default()));
+    let mut pos = Transform::from_xyz(-1.0, -10.0, -1.5);
+    pos.rotate_x(math::Angle::Degrees(-27.0));
+    pos.rotate_y(math::Angle::Degrees(-90.0));
+    world.spawn((CameraBundle::default(), pos, FreeFly3dCamera::default()));
 }

examples/simple_scene/src/main.rs

@@ -1,10 +1,18 @@
 use lyra_engine::{
-    assets::ResourceManager, gltf::Gltf, ecs::query::View, game::App, input::{
+    assets::ResourceManager,
+    game::App,
+    gltf::Gltf,
+    input::{
         Action, ActionHandler, ActionKind, ActionMapping, ActionMappingId, ActionSource,
         InputActionPlugin, KeyCode, LayoutId,
-    }, math::{self, Transform, Vec3}, render::light::directional::DirectionalLight, scene::{
-        system_update_world_transforms, CameraComponent, FreeFlyCamera, FreeFlyCameraPlugin, WorldTransform, ACTLBL_LOOK_LEFT_RIGHT, ACTLBL_LOOK_ROLL, ACTLBL_LOOK_UP_DOWN, ACTLBL_MOVE_FORWARD_BACKWARD, ACTLBL_MOVE_LEFT_RIGHT, ACTLBL_MOVE_UP_DOWN
-    }, winit::WindowOptions
+    },
+    math::{self, Transform, Vec3},
+    render::light::directional::DirectionalLight,
+    scene::{
+        system_update_world_transforms, CameraBundle, FreeFly3dCamera, FreeFlyCameraPlugin,
+        WorldTransform, ACTLBL_LOOK_LEFT_RIGHT, ACTLBL_LOOK_ROLL, ACTLBL_LOOK_UP_DOWN,
+        ACTLBL_MOVE_FORWARD_BACKWARD, ACTLBL_MOVE_LEFT_RIGHT, ACTLBL_MOVE_UP_DOWN,
+    },
 };
 
 #[async_std::main]
@@ -84,7 +92,11 @@ async fn main() {
         .with_plugin(action_handler_plugin)
         //.with_plugin(camera_debug_plugin)
         .with_plugin(FreeFlyCameraPlugin)
-        .with_system("system_update_world_transforms", system_update_world_transforms, &[]);
+        .with_system(
+            "system_update_world_transforms",
+            system_update_world_transforms,
+            &[],
+        );
     a.run();
 }
 
@@ -135,7 +147,9 @@ fn setup_scene_plugin(app: &mut App) {
         ));
     }
 
-    let mut camera = CameraComponent::new_3d();
-    camera.transform.translation += math::Vec3::new(0.0, 0.0, 5.5);
-    world.spawn((camera, FreeFlyCamera::default()));
+    world.spawn((
+        CameraBundle::default(),
+        Transform::from_xyz(0.0, 0.0, 5.5),
+        FreeFly3dCamera::default(),
+    ));
 }

examples/testbed/src/main.rs

@@ -1,14 +1,14 @@
 use std::ptr::NonNull;
 
 use lyra_engine::assets::ResourceManager;
+use lyra_engine::scene::CameraBundle;
 use lyra_engine::{
-    gltf::Gltf,
     ecs::{
-        query::{Res, View},
-        system::{Criteria, CriteriaSchedule, IntoSystem},
+        system::{Criteria, CriteriaSchedule},
         Component, World,
     },
     game::App,
+    gltf::Gltf,
     input::{
         Action, ActionHandler, ActionKind, ActionMapping, ActionMappingId, ActionSource,
         InputActionPlugin, KeyCode, LayoutId, MouseAxis, MouseInput,
@@ -16,9 +16,9 @@ use lyra_engine::{
     math::{self, Quat, Transform, Vec3},
     render::light::{directional::DirectionalLight, PointLight, SpotLight},
     scene::{
-        self, CameraComponent, FreeFlyCamera, FreeFlyCameraPlugin, WorldTransform,
-        ACTLBL_LOOK_LEFT_RIGHT, ACTLBL_LOOK_ROLL, ACTLBL_LOOK_UP_DOWN,
-        ACTLBL_MOVE_FORWARD_BACKWARD, ACTLBL_MOVE_LEFT_RIGHT, ACTLBL_MOVE_UP_DOWN,
+        self, FreeFly3dCamera, FreeFlyCameraPlugin, WorldTransform, ACTLBL_LOOK_LEFT_RIGHT,
+        ACTLBL_LOOK_ROLL, ACTLBL_LOOK_UP_DOWN, ACTLBL_MOVE_FORWARD_BACKWARD,
+        ACTLBL_MOVE_LEFT_RIGHT, ACTLBL_MOVE_UP_DOWN,
     },
     DeltaTime,
 };
@@ -101,7 +101,109 @@ struct CubeFlag;
 
 #[async_std::main]
 async fn main() {
-    let setup_sys = |world: &mut World| -> anyhow::Result<()> {
+    let action_handler_plugin = |app: &mut App| {
+        let action_handler = ActionHandler::builder()
+            .add_layout(LayoutId::from(0))
+            .add_action(ACTLBL_MOVE_FORWARD_BACKWARD, Action::new(ActionKind::Axis))
+            .add_action(ACTLBL_MOVE_LEFT_RIGHT, Action::new(ActionKind::Axis))
+            .add_action(ACTLBL_MOVE_UP_DOWN, Action::new(ActionKind::Axis))
+            .add_action(ACTLBL_LOOK_LEFT_RIGHT, Action::new(ActionKind::Axis))
+            .add_action(ACTLBL_LOOK_UP_DOWN, Action::new(ActionKind::Axis))
+            .add_action(ACTLBL_LOOK_ROLL, Action::new(ActionKind::Axis))
+            .add_action("Debug", Action::new(ActionKind::Button))
+            .add_mapping(
+                ActionMapping::builder(LayoutId::from(0), ActionMappingId::from(0))
+                    .bind(
+                        ACTLBL_MOVE_FORWARD_BACKWARD,
+                        &[
+                            ActionSource::Keyboard(KeyCode::KeyW).into_binding_modifier(1.0),
+                            ActionSource::Keyboard(KeyCode::KeyS).into_binding_modifier(-1.0),
+                        ],
+                    )
+                    .bind(
+                        ACTLBL_MOVE_LEFT_RIGHT,
+                        &[
+                            ActionSource::Keyboard(KeyCode::KeyA).into_binding_modifier(-1.0),
+                            ActionSource::Keyboard(KeyCode::KeyD).into_binding_modifier(1.0),
+                        ],
+                    )
+                    .bind(
+                        ACTLBL_MOVE_UP_DOWN,
+                        &[
+                            ActionSource::Keyboard(KeyCode::KeyC).into_binding_modifier(1.0),
+                            ActionSource::Keyboard(KeyCode::KeyZ).into_binding_modifier(-1.0),
+                        ],
+                    )
+                    .bind(
+                        ACTLBL_LOOK_LEFT_RIGHT,
+                        &[
+                            ActionSource::Mouse(MouseInput::Axis(MouseAxis::X)).into_binding(),
+                            ActionSource::Keyboard(KeyCode::ArrowLeft).into_binding_modifier(-1.0),
+                            ActionSource::Keyboard(KeyCode::ArrowRight).into_binding_modifier(1.0),
+                            //ActionSource::Gamepad(GamepadFormat::DualAxis, GamepadInput::Axis(GamepadAxis::RThumbstickX)).into_binding(),
+                        ],
+                    )
+                    .bind(
+                        ACTLBL_LOOK_UP_DOWN,
+                        &[
+                            ActionSource::Mouse(MouseInput::Axis(MouseAxis::Y)).into_binding(),
+                            ActionSource::Keyboard(KeyCode::ArrowUp).into_binding_modifier(-1.0),
+                            ActionSource::Keyboard(KeyCode::ArrowDown).into_binding_modifier(1.0),
+                            //ActionSource::Gamepad(GamepadFormat::DualAxis, GamepadInput::Axis(GamepadAxis::RThumbstickY)).into_binding(),
+                        ],
+                    )
+                    .bind(
+                        ACTLBL_LOOK_ROLL,
+                        &[
+                            ActionSource::Keyboard(KeyCode::KeyE).into_binding_modifier(-1.0),
+                            ActionSource::Keyboard(KeyCode::KeyQ).into_binding_modifier(1.0),
+                        ],
+                    )
+                    .bind(
+                        "Debug",
+                        &[ActionSource::Keyboard(KeyCode::KeyB).into_binding()],
+                    )
+                    .finish(),
+            )
+            .finish();
+
+        let world = &mut app.world;
+        world.add_resource(action_handler);
+        app.with_plugin(InputActionPlugin);
+    };
+
+    /* let script_test_plugin = |app: &mut App| {
+        game.with_plugin(LuaScriptingPlugin);
+
+        let world = game.world_mut();
+        let mut res_man = world.get_resource_mut::<ResourceManager>();
+        let script = res_man.request::<LuaScript>("scripts/test.lua").unwrap();
+        res_man.watch("scripts/test.lua", false).unwrap();
+        drop(res_man);
+
+        let script = Script::new("test.lua", script);
+        let scripts = ScriptList::new(vec![script]);
+        world.spawn((scripts,));
+
+    }; */
+
+    let mut app = App::new();
+    app.with_plugin(lyra_engine::DefaultPlugins);
+    app.with_plugin(setup_scene_plugin);
+    app.with_plugin(action_handler_plugin);
+    //app.with_plugin(script_test_plugin)
+    //app.with_plugin(fps_plugin)
+    app.with_system(
+        "update_world_transforms",
+        scene::system_update_world_transforms,
+        &[],
+    );
+    app.with_plugin(FreeFlyCameraPlugin);
+    app.run();
+}
+
+fn setup_scene_plugin(app: &mut App) {
+    let world = &mut app.world;
     {
         /* let mut window_options = world.get_resource_mut::<Ct<WindowOptions>>();
         window_options.cursor_grab = CursorGrabMode::Confined;
@@ -267,132 +369,17 @@ async fn main() {
         ));
     } */
 
-        let mut camera = CameraComponent::new_3d();
-        // these values were taken by manually positioning the camera in the scene.
-        camera.transform = Transform::new(
+    world.spawn((
+        CameraBundle::default(),
+        // these values were taken by manually positioning the camera in the scene
+        // and printing the position to console.
+        Transform::new(
             Vec3::new(-10.0, 0.94, -0.28),
             Quat::from_xyzw(0.03375484, -0.7116095, 0.0342693, 0.70092666),
             Vec3::ONE,
-        );
-        //camera.transform.translation += math::Vec3::new(0.0, 0.0, 5.5);
-        world.spawn((camera, FreeFlyCamera::default()));
+        ),
+        FreeFly3dCamera::default(),
+    ));
 
-        Ok(())
-    };
-
-    let camera_debug_plugin = move |app: &mut App| {
-        let sys =
-            |handler: Res<ActionHandler>, view: View<&mut CameraComponent>| -> anyhow::Result<()> {
-                if let Some(true) = handler.was_action_just_pressed("Debug") {
-                    for mut cam in view.into_iter() {
-                        cam.debug = !cam.debug;
-                    }
-                }
-
-                Ok(())
-            };
-
-        app.with_system("camera_debug_trigger", sys, &[]);
-        app.with_system(
-            "update_world_transforms",
-            scene::system_update_world_transforms,
-            &[],
-        );
-    };
-
-    let action_handler_plugin = |app: &mut App| {
-        let action_handler = ActionHandler::builder()
-            .add_layout(LayoutId::from(0))
-            .add_action(ACTLBL_MOVE_FORWARD_BACKWARD, Action::new(ActionKind::Axis))
-            .add_action(ACTLBL_MOVE_LEFT_RIGHT, Action::new(ActionKind::Axis))
-            .add_action(ACTLBL_MOVE_UP_DOWN, Action::new(ActionKind::Axis))
-            .add_action(ACTLBL_LOOK_LEFT_RIGHT, Action::new(ActionKind::Axis))
-            .add_action(ACTLBL_LOOK_UP_DOWN, Action::new(ActionKind::Axis))
-            .add_action(ACTLBL_LOOK_ROLL, Action::new(ActionKind::Axis))
-            .add_action("Debug", Action::new(ActionKind::Button))
-            .add_mapping(
-                ActionMapping::builder(LayoutId::from(0), ActionMappingId::from(0))
-                    .bind(
-                        ACTLBL_MOVE_FORWARD_BACKWARD,
-                        &[
-                            ActionSource::Keyboard(KeyCode::KeyW).into_binding_modifier(1.0),
-                            ActionSource::Keyboard(KeyCode::KeyS).into_binding_modifier(-1.0),
-                        ],
-                    )
-                    .bind(
-                        ACTLBL_MOVE_LEFT_RIGHT,
-                        &[
-                            ActionSource::Keyboard(KeyCode::KeyA).into_binding_modifier(-1.0),
-                            ActionSource::Keyboard(KeyCode::KeyD).into_binding_modifier(1.0),
-                        ],
-                    )
-                    .bind(
-                        ACTLBL_MOVE_UP_DOWN,
-                        &[
-                            ActionSource::Keyboard(KeyCode::KeyC).into_binding_modifier(1.0),
-                            ActionSource::Keyboard(KeyCode::KeyZ).into_binding_modifier(-1.0),
-                        ],
-                    )
-                    .bind(
-                        ACTLBL_LOOK_LEFT_RIGHT,
-                        &[
-                            ActionSource::Mouse(MouseInput::Axis(MouseAxis::X)).into_binding(),
-                            ActionSource::Keyboard(KeyCode::ArrowLeft).into_binding_modifier(-1.0),
-                            ActionSource::Keyboard(KeyCode::ArrowRight).into_binding_modifier(1.0),
-                            //ActionSource::Gamepad(GamepadFormat::DualAxis, GamepadInput::Axis(GamepadAxis::RThumbstickX)).into_binding(),
-                        ],
-                    )
-                    .bind(
-                        ACTLBL_LOOK_UP_DOWN,
-                        &[
-                            ActionSource::Mouse(MouseInput::Axis(MouseAxis::Y)).into_binding(),
-                            ActionSource::Keyboard(KeyCode::ArrowUp).into_binding_modifier(-1.0),
-                            ActionSource::Keyboard(KeyCode::ArrowDown).into_binding_modifier(1.0),
-                            //ActionSource::Gamepad(GamepadFormat::DualAxis, GamepadInput::Axis(GamepadAxis::RThumbstickY)).into_binding(),
-                        ],
-                    )
-                    .bind(
-                        ACTLBL_LOOK_ROLL,
-                        &[
-                            ActionSource::Keyboard(KeyCode::KeyE).into_binding_modifier(-1.0),
-                            ActionSource::Keyboard(KeyCode::KeyQ).into_binding_modifier(1.0),
-                        ],
-                    )
-                    .bind(
-                        "Debug",
-                        &[ActionSource::Keyboard(KeyCode::KeyB).into_binding()],
-                    )
-                    .finish(),
-            )
-            .finish();
-
-        let world = &mut app.world;
-        world.add_resource(action_handler);
-        app.with_plugin(InputActionPlugin);
-    };
-
-    /* let script_test_plugin = |app: &mut App| {
-        game.with_plugin(LuaScriptingPlugin);
-
-        let world = game.world_mut();
-        let mut res_man = world.get_resource_mut::<ResourceManager>();
-        let script = res_man.request::<LuaScript>("scripts/test.lua").unwrap();
-        res_man.watch("scripts/test.lua", false).unwrap();
-        drop(res_man);
-
-        let script = Script::new("test.lua", script);
-        let scripts = ScriptList::new(vec![script]);
-        world.spawn((scripts,));
-
-    }; */
-
-    let mut app = App::new();
-    app.with_plugin(lyra_engine::DefaultPlugins);
-    app.with_startup_system(setup_sys.into_system());
-    app.with_plugin(action_handler_plugin);
-    //app.with_plugin(script_test_plugin)
-    //app.with_plugin(fps_plugin)
-    app.with_plugin(camera_debug_plugin);
-    app.with_plugin(FreeFlyCameraPlugin);
-    app.run();
+    //Ok(())
 }