Add helper methods to Transform

src/main.rs

@@ -3,6 +3,7 @@ mod render;
 mod input_event;
 mod resources;
 mod ecs;
+mod math;
 
 use ecs::components::model_2d::Model2dComponent;
 

src/math/angle.rs

@@ -0,0 +1,36 @@
+use std::f32::consts::PI;
+
+/// Convert degrees to radians
+pub fn degrees_to_radians(degrees: f32) -> f32 {
+    degrees * PI / 180.0
+}
+
+/// Convert radians to degrees
+pub fn radians_to_degrees(radians: f32) -> f32 {
+    radians * 180.0 / PI
+}
+
+pub enum Angle {
+    Degrees(f32),
+    Radians(f32),
+}
+
+impl Angle {
+    /// Converts Angle to radians.
+    /// (conversion is only done if the Angle is in degrees).
+    pub fn to_radians(&self) -> f32 {
+        match *self {
+            Self::Degrees(d) => degrees_to_radians(d),
+            Self::Radians(r) => r,
+        }
+    }
+
+    /// Converts Angle to degrees.
+    /// (conversion is only done if the Angle is in radians).
+    pub fn to_degrees(&self) -> f32 {
+        match *self {
+            Self::Degrees(d) => d,
+            Self::Radians(r) => radians_to_degrees(r),
+        }
+    }
+}

src/math/mod.rs

@@ -0,0 +1,5 @@
+/// Re-export of glam library
+pub use glam::*;
+
+pub mod angle;
+pub use angle::*;

src/render/render_job.rs

@@ -1,19 +1,24 @@
 use hecs::Entity;
 
-use super::{mesh::Mesh, material::Material};
+use super::{mesh::Mesh, material::Material, transform::Transform};
 
 pub struct RenderJob {
     mesh: Mesh,
     material: Material,
     entity: Entity,
+
+    pub transform: Option<Transform>,
+    pub last_transform: Option<Transform>, // TODO: render interpolation
 }
 
 impl RenderJob {
-    pub fn new(mesh: Mesh, material: Material, entity: Entity) -> Self {
+    pub fn new(mesh: Mesh, material: Material, entity: Entity, transform: Option<Transform>, last_transform: Option<Transform>) -> Self {
         Self {
             mesh,
             material,
             entity,
+            transform,
+            last_transform,
         }
     }
 

src/render/renderer.rs

@@ -6,6 +6,7 @@ use std::borrow::Cow;
 use async_std::sync::Mutex;
 use async_trait::async_trait;
 
+use tracing::debug;
 use wgpu::{BindGroup, BindGroupLayout};
 use wgpu::util::DeviceExt;
 use winit::window::Window;
@@ -55,7 +56,6 @@ pub struct BasicRenderer {
 
     buffer_storage: HashMap<Entity, RenderBufferStorage>, // TODO: clean up left over buffers from deleted entities/components
 
-    transform_uniform: Transform,
     transform_bind_group: wgpu::BindGroup,
     transform_buffer: wgpu::Buffer,
 }
@@ -115,10 +115,6 @@ impl BasicRenderer {
         };
         surface.configure(&device, &config);
 
-
-        /* let diffuse_bytes = include_bytes!("../../res/happy-tree.png");
-        let diffuse_texture = RenderTexture::from_bytes(&device, &queue, diffuse_bytes, "happy-tree.png").unwrap(); */
-
         let texture_bind_group_layout =
             device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
                 entries: &[
@@ -144,52 +140,16 @@ impl BasicRenderer {
                 label: Some("texture_bind_group_layout"),
             });
 
-        let transform_bind_group_layout =
-            device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
-                entries: &[
-                    wgpu::BindGroupLayoutEntry {
-                        binding: 0,
-                        visibility: wgpu::ShaderStages::FRAGMENT,
-                        ty: wgpu::BindingType::Texture {
-                            multisampled: false,
-                            view_dimension: wgpu::TextureViewDimension::D2,
-                            sample_type: wgpu::TextureSampleType::Float { filterable: true },
-                        },
-                        count: None,
-                    },
-                ],
-                label: Some("texture_bind_group_layout"),
-            });
-
-        /* let diffuse_bind_group = device.create_bind_group(
-            &wgpu::BindGroupDescriptor {
-                layout: &texture_bind_group_layout,
-                entries: &[
-                    wgpu::BindGroupEntry {
-                        binding: 0,
-                        resource: wgpu::BindingResource::TextureView(diffuse_texture.view()),
-                    },
-                    wgpu::BindGroupEntry {
-                        binding: 1,
-                        resource: wgpu::BindingResource::Sampler(diffuse_texture.sampler()),
-                    }
-                ],
-                label: Some("diffuse_bind_group"),
-            }
-        ); */
-
-
         let shader_src = resources::load_string("shader/base_2d.wgsl").await.expect("Failed to load shader!");
         let shader = device.create_shader_module(wgpu::ShaderModuleDescriptor {
             label: Some("Shader"),
             source: wgpu::ShaderSource::Wgsl(Cow::Borrowed(&shader_src)),
         });
 
-        let transform_uniform = Transform::new();
         let transform_buffer = device.create_buffer_init(
             &wgpu::util::BufferInitDescriptor {
-                label: Some("Camera Buffer"),
+                label: Some("Transform Buffer"),
-                contents: bytemuck::cast_slice(&[transform_uniform]),
+                contents: bytemuck::cast_slice(&[Transform::new()]),
                 usage: wgpu::BufferUsages::UNIFORM | wgpu::BufferUsages::COPY_DST,
             }
         );
@@ -220,8 +180,6 @@ impl BasicRenderer {
             ],
             label: Some("transform_bind_group"),
         });
-        
-        
 
         let mut pipelines = HashMap::new();
         pipelines.insert(0, Arc::new(FullRenderPipeline::new(&device, &config, &shader, 
@@ -244,7 +202,6 @@ impl BasicRenderer {
             render_jobs: HashMap::new(),
             buffer_storage: HashMap::new(),
 
-            transform_uniform,
             transform_buffer,
             transform_bind_group,
         }
@@ -339,7 +296,14 @@ impl BasicRenderer {
 impl Renderer for BasicRenderer {
     async fn prepare(&mut self, main_world: &World) {
         for (entity, (model, transform)) in main_world.query::<(&Model2dComponent, Option<&TransformComponent>)>().iter() {
-            let job = RenderJob::new(model.mesh.clone(), model.material.clone(), entity);
+            let transform = match transform {
+                Some(transform) => {
+                    Some(transform.transform)
+                },
+                None => None,
+            };
+
+            let job = RenderJob::new(model.mesh.clone(), model.material.clone(), entity, transform, None);
 
             // Insert the new job into the queue
             if let Some(shader_jobs) = self.render_jobs.get_mut(&model.material.shader_id) {
@@ -352,15 +316,7 @@ impl Renderer for BasicRenderer {
                 let buffers = self.create_model_buffers(model);
                 self.buffer_storage.insert(entity, buffers);
             } else {
-                let mesh = &model.mesh;
                 
-                // update existing buffers
-            }
-
-            if let Some(transform) = transform {
-                self.transform_uniform = transform.transform;
-
-                self.queue.write_buffer(&self.transform_buffer, 0, bytemuck::cast_slice(&[self.transform_uniform]));
             }
         }
     }
@@ -400,13 +356,19 @@ impl Renderer for BasicRenderer {
             if let Some(jobs) = pipeline_jobs {
                 for job in jobs.iter() {
                     let mesh = job.mesh();
-                    let buffers = self.buffer_storage.get(&job.entity()).unwrap(); // TODO: create buffers if not made
+                    let buffers = self.buffer_storage.get(&job.entity()).unwrap();
                     
                     if let Some(tex) = buffers.texture_bindgroup.as_ref() {
                         render_pass.set_bind_group(0, &tex, &[]);
                     }
 
-                    render_pass.set_bind_group(1, &self.transform_bind_group, &[]);
+                    // If the job has a transform, set the uniform to it
+                    if let Some(transform) = job.transform {
+                        self.queue.write_buffer(&self.transform_buffer, 0, bytemuck::cast_slice(&[transform]));
+                        render_pass.set_bind_group(1, &self.transform_bind_group, &[]);
+                    } else {
+                        debug!("//TODO: clear transform uniform if the RenderJob doesn't have a transform.");
+                    }
         
                     if let Some(indices) = buffers.buffer_indices.as_ref() {
                         let indices_len = indices.count().unwrap(); // index buffers will have count, if not thats a bug

src/render/transform.rs

@@ -1,4 +1,6 @@
-use glam::Vec3;
+use glam::{Vec3, Mat4, Quat};
+
+use crate::math::angle::{self, Angle};
 
 #[repr(C)]
 #[derive(Debug, Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)]
@@ -14,33 +16,115 @@ impl Default for Transform {
     }
 }
 
+#[allow(dead_code)]
 impl Transform {
     pub fn new() -> Self {
         Self::default()
     }
 
-    pub fn from_glam(matrix: glam::Mat4) -> Self {
+    pub fn from_matrix(matrix: glam::Mat4) -> Self {
         Self {
             matrix,
         }
     }
 
+    /// Create Transform from scale, rotation (in degrees), and translation
+    pub fn from_scale_rotation_deg_translation(scale: Vec3, mut rotation: Vec3, translation: Vec3) -> Self {
+        rotation.x = angle::degrees_to_radians(rotation.x);
+        rotation.y = angle::degrees_to_radians(rotation.y);
+        rotation.z = angle::degrees_to_radians(rotation.z);
+        let rotation_quat = glam::Quat::from_euler(glam::EulerRot::XYZ, rotation.x, rotation.y, rotation.z);
+
+        let matrix = glam::Mat4::from_scale_rotation_translation(scale, rotation_quat, translation);
+
+        Self::from_matrix(matrix)
+    }
+
+    /// Create Transform from scale, rotation (in radians), and translation
+    pub fn from_scale_rotation_rad_translation(scale: Vec3, rotation: Vec3, translation: Vec3) -> Self {
+        let rotation_quat = glam::Quat::from_euler(glam::EulerRot::XYZ, rotation.x, rotation.y, rotation.z);
+        let matrix = glam::Mat4::from_scale_rotation_translation(scale, rotation_quat, translation);
+
+        Self::from_matrix(matrix)
+    }
+
+    /// Create Transform from scale, rotation (as a quaternion), and translation
+    pub fn from_scale_rotation_quat_translation(scale: Vec3, rotation: Quat, translation: Vec3) -> Self {
+        let matrix = glam::Mat4::from_scale_rotation_translation(scale, rotation, translation);
+
+        Self::from_matrix(matrix)
+    }
+
     pub fn translate_vec3(&mut self, vec: Vec3) -> &mut Self {
-        /* let first_col = self.matrix.col(0);
-        let second_col = self.matrix.col(1);
-        let third_col = self.matrix.col(2);
-
-        //let fourth_col = self.matrix.col_mut(3);
-        let w_axis = &mut self.matrix.w_axis;
-        //first_col.w 
-        //fourth_col = fourth_col.x * vec.x + second_col * vec.y + third_col * vec.z + fourth_col.clone();
-        w_axis.x += vec.x;
-        w_axis.y += vec.y;
-        w_axis.z += vec.z; */
-
         let translation = glam::Mat4::from_translation(vec);
         self.matrix *= translation;
 
         self
     }
+
+    /// Rotate around the given axis.
+    pub fn rotate_axis(&mut self, axis: Vec3, angle: Angle) -> &mut Self {
+        let radians = angle.to_radians();
+
+        let rotation = glam::Mat4::from_axis_angle(axis, radians);
+        self.matrix *= rotation;
+
+        self
+    }
+
+    // Rotate the transform with degrees
+    pub fn rotate_degrees(&mut self, mut x: f32, mut y: f32, mut z: f32) -> &mut Self {
+        // Convert degrees to radians
+        x = angle::degrees_to_radians(x);
+        y = angle::degrees_to_radians(y);
+        z = angle::degrees_to_radians(z);
+
+        let rotation = glam::Mat4::from_euler(glam::EulerRot::XYZ, x, y, z);
+        self.matrix *= rotation;
+
+        self
+    }
+
+    // Rotate the transform with degrees in a vec
+    pub fn rotate_degrees_vec(&mut self, mut rotation: Vec3) -> &mut Self {
+        self.rotate_degrees(rotation.x, rotation.y, rotation.z)
+    }
+
+    // Rotate the transform with radians
+    pub fn rotate_radians(&mut self, rotation: Vec3) -> &mut Self {
+        let rotation = glam::Mat4::from_euler(glam::EulerRot::XYZ, rotation.x, rotation.y, rotation.z);
+        self.matrix *= rotation;
+
+        self
+    }
+
+    /// Rotate the transform with a quaternion
+    pub fn rotate_quat(&mut self, quat: glam::Quat) -> &mut Self {
+        let rotation = glam::Mat4::from_quat(quat);
+        self.matrix *= rotation;
+
+        self
+    }
+
+    /// Rotate around the x axis.
+    pub fn rotate_x(&mut self, angle: Angle) -> &mut Self {
+        self.rotate_axis(Vec3::new(1.0, 0.0, 0.0), angle)
+    }
+
+    /// Rotate around the y axis.
+    pub fn rotate_y(&mut self, angle: Angle) -> &mut Self {
+        self.rotate_axis(Vec3::new(0.0, 1.0, 0.0), angle)
+    }
+
+    /// Rotate around the z axis.
+    pub fn rotate_z(&mut self, angle: Angle) -> &mut Self {
+        self.rotate_axis(Vec3::new(0.0, 0.0, 0.0), angle)
+    }
+
+    pub fn scale(&mut self, scale: Vec3) -> &mut Self {
+        let scale = Mat4::from_scale(scale);
+        self.matrix *= scale;
+
+        self
+    }
 }