Create simple keyboard controlled free fly camera

examples/testbed/Cargo.lock

@@ -2313,6 +2313,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "async-std",
+ "edict",
  "fps_counter",
  "lyra-engine",
  "tracing",

examples/testbed/Cargo.toml

@@ -11,5 +11,6 @@ anyhow = "1.0.75"
 async-std = "1.12.0"
 tracing = "0.1.37"
 fps_counter = "2.0.0"
+edict = "0.5.0"
 
 [workspace]

examples/testbed/src/free_fly_camera.rs

@@ -0,0 +1,122 @@
+use std::ops::Deref;
+
+use edict::{World, Component};
+use lyra_engine::{math::{Vec3, Angle, Quat}, input::{InputButtons, KeyCode, MouseMotion}, ecs::{SimpleSystem, components::camera::CameraComponent, EventQueue}, game::Game, plugin::Plugin};
+use tracing::debug;
+
+#[derive(Clone, Component)]
+pub struct FreeFlyCamera {
+    pub speed: f32,
+    pub look_speed: f32,
+    pub look_with_keys: bool
+}
+
+impl Default for FreeFlyCamera {
+    fn default() -> Self {
+        Self {
+            speed: 0.07,
+            look_speed: 0.01,
+            look_with_keys: false
+        }
+    }
+}
+
+impl FreeFlyCamera {
+    pub fn new(speed: f32, look_speed: f32, look_with_keys: bool) -> Self {
+        Self {
+            speed,
+            look_speed,
+            look_with_keys
+        }
+    }
+}
+
+pub struct FreeFlyCameraController;
+
+impl SimpleSystem for FreeFlyCameraController {
+    fn execute_mut(&mut self, world: &mut World) -> anyhow::Result<()> {
+        let mut camera_rot = Vec3::default();
+
+        let keys = world.get_resource::<InputButtons<KeyCode>>()
+            .map(|r| r.deref().clone());
+        if keys.is_none() {
+            return Ok(());
+        }
+        let keys = keys.unwrap();
+
+        if keys.is_pressed(KeyCode::Left) {
+            camera_rot.y += 1.0;
+        }
+
+        if keys.is_pressed(KeyCode::Right) {
+            camera_rot.y -= 1.0;
+        }
+
+        if keys.is_pressed(KeyCode::Up) {
+            camera_rot.x += 1.0;
+        }
+
+        if keys.is_pressed(KeyCode::Down) {
+            camera_rot.x -= 1.0;
+        }
+
+        if keys.is_pressed(KeyCode::E) {
+            camera_rot.z -= 1.0;
+        }
+
+        if keys.is_pressed(KeyCode::Q) {
+            camera_rot.z += 1.0;
+        }
+
+        let camera_rot = camera_rot.normalize();
+        
+        for (cam, fly) in world.query_mut::<(&mut CameraComponent, &mut FreeFlyCamera)>().iter_mut() {
+            let forward = cam.transform.forward();
+            let left = cam.transform.left();
+            let up = cam.transform.up();
+
+            let mut velocity = Vec3::ZERO;
+
+            if keys.is_pressed(KeyCode::A) {
+                velocity -= left;
+            }
+    
+            if keys.is_pressed(KeyCode::D) {
+                velocity += left;
+            }
+    
+            if keys.is_pressed(KeyCode::W) {
+                velocity += forward;
+            }
+    
+            if keys.is_pressed(KeyCode::S) {
+                velocity -= forward;
+            }
+
+            if keys.is_pressed(KeyCode::C) {
+                velocity += up;
+            }
+    
+            if keys.is_pressed(KeyCode::Z) {
+                velocity -= up;
+            }
+
+            if velocity != Vec3::ZERO {
+                cam.transform.translation += velocity.normalize() * fly.speed;
+            }
+
+            if !camera_rot.is_nan() {
+                let look_velocity = camera_rot.normalize() * fly.look_speed;
+                cam.transform.rotation *= Quat::from_rotation_x(look_velocity.x) * Quat::from_rotation_y(look_velocity.y) * Quat::from_rotation_z(look_velocity.z);
+            }
+        }
+
+        Ok(())
+    }
+}
+
+impl Plugin for FreeFlyCameraController {
+    fn setup(&self, game: &mut Game) {
+        game.with_system("free_fly_camera_controller", FreeFlyCameraController, &[]);
+    }
+}

examples/testbed/src/main.rs

@@ -1,9 +1,11 @@
-use lyra_engine::{math, ecs::{World, components::{transform::TransformComponent, camera::CameraComponent, model::ModelComponent}, EventQueue}, math::Transform, input::{KeyCode, InputButtons, MouseMotion}, game::Game};
-
+use lyra_engine::{math::{self, Vec3}, ecs::{World, components::{transform::TransformComponent, camera::CameraComponent, model::ModelComponent}, EventQueue, SimpleSystem, Component}, math::Transform, input::{KeyCode, InputButtons, MouseMotion}, game::Game, plugin::Plugin, render::window::{CursorGrabMode, WindowOptions}, change_tracker::Ct};
 use lyra_engine::assets::{ResourceManager, Model};
 
 use tracing::debug;
 
+mod free_fly_camera;
+use free_fly_camera::{FreeFlyCameraController, FreeFlyCamera};
+
 /* pub const VERTICES: &[Vertex] = &[
     Vertex { position: [-0.0868241, 0.49240386, 0.0], tex_coords: [0.4131759, 0.00759614], }, // A
     Vertex { position: [-0.49513406, 0.06958647, 0.0], tex_coords: [0.0048659444, 0.43041354], }, // B
@@ -46,8 +48,8 @@ async fn main() {
         let mut camera = CameraComponent::new_3d();
         camera.transform.translation += math::Vec3::new(0.0, 0.0, 7.5);
         //camera.transform.rotate_y(Angle::Degrees(-25.0));
-        camera.transform.rotate_z(math::Angle::Degrees(-90.0));
-        world.spawn((camera,));
+        //camera.transform.rotate_z(math::Angle::Degrees(-90.0));
+        world.spawn(( camera, FreeFlyCamera::default() ));
 
         Ok(())
     };
@@ -156,7 +158,7 @@ async fn main() {
     };
 
     let jiggle_plugin = move |game: &mut Game| {
-        game.with_system("jiggle", jiggle_system, &["input"]);
+        //game.with_system("jiggle", jiggle_system, &["input"]);
     };
     
     Game::initialize().await
@@ -164,5 +166,6 @@ async fn main() {
         .with_startup_system(setup_sys)
         //.with_plugin(fps_plugin)
         .with_plugin(jiggle_plugin)
+        .with_plugin(FreeFlyCameraController)
         .run().await;
 }

src/input.rs

@@ -139,6 +139,7 @@ pub struct CursorEnteredWindow;
 #[derive(Clone, Debug, Eq, PartialEq)]
 pub struct CursorLeftWindow;
 
+#[derive(Clone)]
 pub struct InputButtons<T: Clone + Hash + Eq + PartialEq + 'static> {
     // the u64 as the key is the hashed value of T. this makes it easier to
     // search for a button and see its state

src/math/transform.rs

@@ -56,7 +56,17 @@ impl Transform {
 
     /// Get the forward vector of the Transform.
     pub fn forward(&self) -> Vec3 {
-        self.rotation * ONE_V3
+        (self.rotation * -Vec3::Z).normalize()
+    }
+
+    /// Get the left vector of the Transform.
+    pub fn left(&self) -> Vec3 {
+        (self.rotation * Vec3::X).normalize()
+    }
+
+    /// Get the up vector of the Transform.
+    pub fn up(&self) -> Vec3 {
+        (self.rotation * Vec3::Y).normalize()
     }
 
     /// Rotate this transform using a Quaternion

src/render/camera.rs

@@ -66,13 +66,13 @@ impl RenderCamera {
         match camera.mode {
             CameraProjectionMode::Perspective => {
                 let position = camera.transform.translation;
-                let target = camera.transform.rotation * glam::Vec3::new(0.0, 0.0, -1.0);
-                let target = target.normalize();
+                let forward = camera.transform.forward();
+                let up = camera.transform.up();
 
                 let view = glam::Mat4::look_to_rh(
                     position,
-                    target,
-                    glam::Vec3::new(0.0, 1.0, 0.0)
+                    forward,
+                    up
                 );
                 
                 let proj = glam::Mat4::perspective_rh_gl(camera.fov.to_radians(), self.aspect, self.znear, self.zfar);