transition math to nalgebra and add tiny-town.

.gitignore

@@ -1,3 +1,7 @@
 /target
 **/*.rs.bk
 Cargo.lock
+
+tiny-town/target
+**/*.rs.bk
+tiny-town/Cargo.lock

Cargo.toml

@@ -6,11 +6,10 @@ edition = "2018"
 
 [dependencies]
 legion = { git = "https://github.com/TomGillen/legion.git" }
-nalgebra = "0.18"
+nalgebra-glm = "0.5.0"
 wgpu = { git = "https://github.com/gfx-rs/wgpu-rs.git", rev = "44fa1bc2fa208fa92f80944253e0da56cb7ac1fe"}
 winit = "0.20.0-alpha4"
 glsl-to-spirv = "0.1"
-cgmath = "0.17"
 zerocopy = "0.2"
 log = "0.4"
 env_logger = "0.7"

examples/simple.rs

@@ -13,7 +13,6 @@ fn main() {
     // Create a query which finds all `Position` and `Velocity` components
     let mut query = Read::<Transform>::query();
     
-
     // // Iterate through all entities that match the query in the world
     for mut trans in query.iter(&mut world) {
         // println!("{} hi", trans.global);

src/application.rs

@@ -4,7 +4,8 @@ use winit::{
     event_loop::{ControlFlow, EventLoop},
 };
 
-use zerocopy::{AsBytes, FromBytes};
+use zerocopy::AsBytes;
+use nalgebra_glm as glm;
 
 use std::rc::Rc;
 use std::mem;
@@ -12,23 +13,6 @@ use std::mem;
 use crate::temp::*;
 use crate::vertex::*;
 
-#[cfg_attr(rustfmt, rustfmt_skip)]
-#[allow(unused)]
-pub const OPENGL_TO_WGPU_MATRIX: cgmath::Matrix4<f32> = cgmath::Matrix4::new(
-    1.0, 0.0, 0.0, 0.0,
-    0.0, -1.0, 0.0, 0.0,
-    0.0, 0.0, 0.5, 0.0,
-    0.0, 0.0, 0.5, 1.0,
-);
-
-#[allow(dead_code)]
-pub fn cast_slice<T>(data: &[T]) -> &[u8] {
-    use std::mem::size_of;
-    use std::slice::from_raw_parts;
-
-    unsafe { from_raw_parts(data.as_ptr() as *const u8, data.len() * size_of::<T>()) }
-}
-
 pub struct Application
 {
     entities: Vec<Entity>,
@@ -38,6 +22,8 @@ pub struct Application
     forward_pass: Pass,
     forward_depth: wgpu::TextureView,
     light_uniform_buf: wgpu::Buffer,
+    camera_position: glm::Vec3,
+    camera_fov: f32,
 }
 
 impl Application {
@@ -88,8 +74,6 @@ impl Application {
             });
 
         let mut entities = vec![{
-            use cgmath::SquareMatrix;
-
             let bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
                 layout: &local_bind_group_layout,
                 bindings: &[wgpu::Binding {
@@ -101,7 +85,7 @@ impl Application {
                 }],
             });
             Entity {
-                mx_world: cgmath::Matrix4::identity(),
+                mx_world: glm::identity(),
                 rotation_speed: 0.0,
                 color: wgpu::Color::WHITE,
                 vertex_buf: Rc::new(plane_vertex_buf),
@@ -112,53 +96,39 @@ impl Application {
             }
         }];
 
+        let camera_position = glm::vec3(3.0f32, -10.0, 6.0);
+        let camera_fov = glm::quarter_pi();
+
         struct CubeDesc {
-            offset: cgmath::Vector3<f32>,
-            angle: f32,
-            scale: f32,
+            offset: glm::Vec3,
             rotation: f32,
         }
         let cube_descs = [
             CubeDesc {
-                offset: cgmath::vec3(-2.0, -2.0, 2.0),
-                angle: 10.0,
-                scale: 0.7,
+                offset: glm::vec3(-2.0, -2.0, 2.0),
                 rotation: 0.1,
             },
             CubeDesc {
-                offset: cgmath::vec3(2.0, -2.0, 2.0),
-                angle: 50.0,
-                scale: 1.3,
+                offset: glm::vec3(2.0, -2.0, 2.0),
                 rotation: 0.2,
             },
             CubeDesc {
-                offset: cgmath::vec3(-2.0, 2.0, 2.0),
-                angle: 140.0,
-                scale: 1.1,
+                offset: glm::vec3(-2.0, 2.0, 2.0),
                 rotation: 0.3,
             },
             CubeDesc {
-                offset: cgmath::vec3(2.0, 2.0, 2.0),
-                angle: 210.0,
-                scale: 0.9,
+                offset: glm::vec3(2.0, 2.0, 2.0),
                 rotation: 0.4,
             },
         ];
 
         for cube in &cube_descs {
-            use cgmath::{Decomposed, Deg, InnerSpace, Quaternion, Rotation3};
-
-            let transform = Decomposed {
-                disp: cube.offset.clone(),
-                rot: Quaternion::from_axis_angle(cube.offset.normalize(), Deg(cube.angle)),
-                scale: cube.scale,
-            };
             let uniform_buf = device.create_buffer(&wgpu::BufferDescriptor {
                 size: entity_uniform_size,
                 usage: wgpu::BufferUsage::UNIFORM | wgpu::BufferUsage::COPY_DST,
             });
             entities.push(Entity {
-                mx_world: cgmath::Matrix4::from(transform),
+                mx_world: glm::translation(&cube.offset),
                 rotation_speed: cube.rotation,
                 color: wgpu::Color::GREEN,
                 vertex_buf: Rc::clone(&cube_vertex_buf),
@@ -217,26 +187,26 @@ impl Application {
             .collect::<Vec<_>>();
         let lights = vec![
             Light {
-                pos: cgmath::Point3::new(7.0, -5.0, 10.0),
+                pos: glm::vec3(7.0, -5.0, 10.0),
                 color: wgpu::Color {
                     r: 0.5,
                     g: 1.0,
                     b: 0.5,
                     a: 1.0,
                 },
-                fov: 60.0,
+                fov: f32::to_radians(60.0),
                 depth: 1.0 .. 20.0,
                 target_view: shadow_target_views[0].take().unwrap(),
             },
             Light {
-                pos: cgmath::Point3::new(-5.0, 7.0, 10.0),
+                pos: glm::vec3(-5.0, 7.0, 10.0),
                 color: wgpu::Color {
                     r: 1.0,
                     g: 0.5,
                     b: 0.5,
                     a: 1.0,
                 },
-                fov: 45.0,
+                fov: f32::to_radians(45.0),
                 depth: 1.0 .. 20.0,
                 target_view: shadow_target_views[1].take().unwrap(),
             },
@@ -383,7 +353,7 @@ impl Application {
                 bind_group_layouts: &[&bind_group_layout, &local_bind_group_layout],
             });
 
-            let mx_total = generate_matrix(sc_desc.width as f32 / sc_desc.height as f32);
+            let mx_total = generate_matrix(&camera_position, camera_fov, sc_desc.width as f32 / sc_desc.height as f32, 1.0, 20.0);
             let forward_uniforms = ForwardUniforms {
                 proj: *mx_total.as_ref(),
                 num_lights: [lights.len() as u32, 0, 0, 0],
@@ -501,6 +471,8 @@ impl Application {
             forward_pass,
             forward_depth: depth_texture.create_default_view(),
             light_uniform_buf,
+            camera_position,
+            camera_fov
         };
         (this, None)
     }
@@ -512,8 +484,8 @@ impl Application {
     ) -> Option<wgpu::CommandBuffer>
     {
         let command_buf = {
-            let mx_total = generate_matrix(sc_desc.width as f32 / sc_desc.height as f32);
-            let mx_ref: &[f32; 16] = mx_total.as_ref();
+            let mx_total = generate_matrix(&self.camera_position, self.camera_fov, sc_desc.width as f32 / sc_desc.height as f32, 1.0, 20.0);
+            let mx_ref: [[f32; 4]; 4] = mx_total.into();
             let temp_buf =
                 device.create_buffer_with_data(mx_ref.as_bytes(), wgpu::BufferUsage::COPY_SRC);
 
@@ -541,7 +513,7 @@ impl Application {
         Some(command_buf)
     }
 
-    fn update(&mut self, event: WindowEvent)
+    fn update(&mut self, _: WindowEvent)
     {
     }
 
@@ -559,7 +531,6 @@ impl Application {
             let temp_buf_data = device
                 .create_buffer_mapped(self.entities.len() * size, wgpu::BufferUsage::COPY_SRC);
 
-            // FIXME: Align and use `LayoutVerified`
             for (entity, slot) in self
                 .entities
                 .iter_mut()
@@ -567,7 +538,7 @@ impl Application {
             {
                 if entity.rotation_speed != 0.0 {
                     let rotation =
-                        cgmath::Matrix4::from_angle_x(cgmath::Deg(entity.rotation_speed));
+                        glm::rotation(entity.rotation_speed, &glm::vec3(0.0, 1.0, 0.0));
                     entity.mx_world = entity.mx_world * rotation;
                 }
                 slot.copy_from_slice(
@@ -603,7 +574,6 @@ impl Application {
             let total_size = size * self.lights.len();
             let temp_buf_data =
                 device.create_buffer_mapped(total_size, wgpu::BufferUsage::COPY_SRC);
-            // FIXME: Align and use `LayoutVerified`
             for (light, slot) in self
                 .lights
                 .iter()

src/lib.rs

@@ -4,4 +4,5 @@ mod vertex;
 mod temp;
 
 pub use transform::Transform;
-pub use application::Application;
+pub use application::Application;
+pub use legion;

src/temp.rs

@@ -1,28 +1,18 @@
 pub use std::rc::Rc;
 pub use std::ops::Range;
 use zerocopy::{AsBytes, FromBytes};
+use nalgebra_glm as glm;
 
-pub const OPENGL_TO_WGPU_MATRIX: cgmath::Matrix4<f32> = cgmath::Matrix4::new(
-    1.0,
-    0.0,
-    0.0,
-    0.0,
-    0.0,
-    -1.0,
-    0.0,
-    0.0,
-    0.0,
-    0.0,
-    0.5,
-    0.0,
-    0.0,
-    0.0,
-    0.5,
-    1.0,
-);
-
+pub fn opengl_to_wgpu_matrix() -> glm::Mat4 {
+    glm::mat4(
+        1.0, 0.0, 0.0, 0.0,
+        0.0, -1.0, 0.0, 0.0,
+        0.0, 0.0, 0.5, 0.0,
+        0.0, 0.0, 0.5, 1.0,
+    )
+}
 pub struct Entity {
-    pub mx_world: cgmath::Matrix4<f32>,
+    pub mx_world: glm::Mat4,
     pub rotation_speed: f32,
     pub color: wgpu::Color,
     pub vertex_buf: Rc<wgpu::Buffer>,
@@ -33,7 +23,7 @@ pub struct Entity {
 }
 
 pub struct Light {
-    pub pos: cgmath::Point3<f32>,
+    pub pos: glm::Vec3,
     pub color: wgpu::Color,
     pub fov: f32,
     pub depth: Range<f32>,
@@ -50,19 +40,8 @@ pub struct LightRaw {
 
 impl Light {
     pub fn to_raw(&self) -> LightRaw {
-        use cgmath::{Deg, EuclideanSpace, Matrix4, PerspectiveFov, Point3, Vector3};
-
-        let mx_view = Matrix4::look_at(self.pos, Point3::origin(), Vector3::unit_z());
-        let projection = PerspectiveFov {
-            fovy: Deg(self.fov).into(),
-            aspect: 1.0,
-            near: self.depth.start,
-            far: self.depth.end,
-        };
-        let mx_view_proj = OPENGL_TO_WGPU_MATRIX *
-            cgmath::Matrix4::from(projection.to_perspective()) * mx_view;
         LightRaw {
-            proj: *mx_view_proj.as_ref(),
+            proj: generate_matrix(&self.pos, self.fov, 1.0, self.depth.start, self.depth.end).into(),
             pos: [self.pos.x, self.pos.y, self.pos.z, 1.0],
             color: [
                 self.color.r as f32,
@@ -99,6 +78,7 @@ pub struct Pass {
     pub uniform_buf: wgpu::Buffer,
 }
 
+#[allow(dead_code)]
 pub enum ShaderStage {
     Vertex,
     Fragment,
@@ -115,12 +95,14 @@ pub fn load_glsl(code: &str, stage: ShaderStage) -> Vec<u32> {
     wgpu::read_spirv(glsl_to_spirv::compile(&code, ty).unwrap()).unwrap()
 }
 
-pub fn generate_matrix(aspect_ratio: f32) -> cgmath::Matrix4<f32> {
-    let mx_projection = cgmath::perspective(cgmath::Deg(45f32), aspect_ratio, 1.0, 20.0);
-    let mx_view = cgmath::Matrix4::look_at(
-        cgmath::Point3::new(3.0f32, -10.0, 6.0),
-        cgmath::Point3::new(0f32, 0.0, 0.0),
-        cgmath::Vector3::unit_z(),
+pub fn generate_matrix(eye: &glm::Vec3, fov: f32, aspect_ratio: f32, near: f32, far: f32) -> glm::Mat4 {
+    let projection = glm::perspective(aspect_ratio, fov, near, far);
+
+    let view = glm::look_at_rh::<f32>(
+        &eye,
+        &glm::vec3(0.0, 0.0, 0.0),
+        &glm::vec3(0.0, 0.0, 1.0),
     );
-    OPENGL_TO_WGPU_MATRIX * mx_projection * mx_view
+
+    opengl_to_wgpu_matrix() * projection * view
 }

src/transform.rs

@@ -1,16 +1,16 @@
-use nalgebra::Matrix4;
+use nalgebra_glm as glm;
 
 #[derive(Clone, Copy, Debug, PartialEq)]
 pub struct Transform {
-    pub local: Matrix4<f32>,
-    pub global: Matrix4<f32>,
+    pub local: glm::Mat4,
+    pub global: glm::Mat4,
 }
 
 impl Transform {
     pub fn new() -> Transform {
         Transform {
-            local: Matrix4::<f32>::identity(),
-            global: Matrix4::<f32>::identity(),
+            local: glm::identity(),
+            global: glm::identity(),
         }
     }
 }

src/vertex.rs

@@ -73,6 +73,7 @@ pub fn create_plane(size: i8) -> (Vec<Vertex>, Vec<u16>) {
     (vertex_data.to_vec(), index_data.to_vec())
 }
 
+#[allow(dead_code)]
 pub fn create_texels(size: usize) -> Vec<u8> {
     use std::iter;
 

tiny-town/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "tiny-town"
+version = "0.1.0"
+authors = ["Carter Anderson <mcanders1@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+bevy = { path = "../" }

tiny-town/README.md

@@ -0,0 +1,6 @@
+
+
+```bash
+# run using this command
+env RUSTFLAGS="-C link-arg=-fuse-ld=lld" cargo run --release
+```

tiny-town/src/main.rs

@@ -0,0 +1,12 @@
+use bevy::*;
+use bevy::legion::prelude::*;
+
+fn main() {
+    let universe = Universe::new();
+    let mut world = universe.create_world();
+    world.insert((), vec![(Transform::new(),)]);
+
+    // Create a query which finds all `Position` and `Velocity` components
+    // let mut query = Read::<Transform>::query();
+    Application::run();
+}