Pass View and Proj Matrices Separetely

Author: qlurkin

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "wgpu-bootstrap"
-version = "0.2.1"
+version = "0.2.2"
 edition = "2021"
 
 [dependencies]

Cargo.toml

@@ -1,5 +1,6 @@
 struct CameraUniform {
-    view_proj: mat4x4<f32>,
+    view: mat4x4<f32>,
+    proj: mat4x4<f32>,
 };
 @group(0) @binding(0) var<uniform> camera: CameraUniform;
 
@@ -19,7 +20,7 @@ fn vs_main(
 ) -> VertexOutput {
     var out: VertexOutput;
     out.color = model.color;
-    out.clip_position = camera.view_proj * vec4<f32>(model.position, 1.0);
+    out.clip_position = camera.proj * camera.view * vec4<f32>(model.position, 1.0);
     return out;
 }
 

examples/cube/shader.wgsl

@@ -1,5 +1,6 @@
 struct CameraUniform {
-    view_proj: mat4x4<f32>,
+    view: mat4x4<f32>,
+    proj: mat4x4<f32>,
 };
 @group(0) @binding(0) var<uniform> camera: CameraUniform;
 
@@ -19,7 +20,7 @@ fn vs_main(
 ) -> VertexOutput {
     var out: VertexOutput;
     out.color = model.color;
-    out.clip_position = camera.view_proj * vec4<f32>(model.position, 1.0);
+    out.clip_position = camera.proj * camera.view * vec4<f32>(model.position, 1.0);
     return out;
 }
 

examples/gui/shader.wgsl

@@ -1,5 +1,6 @@
 struct CameraUniform {
-    view_proj: mat4x4<f32>,
+    view: mat4x4<f32>,
+    proj: mat4x4<f32>,
 };
 @group(0) @binding(0) var<uniform> camera: CameraUniform;
 
@@ -24,7 +25,7 @@ fn vs_main(
 ) -> VertexOutput {
     var out: VertexOutput;
     out.color = model.color;
-    out.clip_position = camera.view_proj * vec4<f32>(model.position + instance.pos, 1.0);
+    out.clip_position = camera.proj * camera.view * vec4<f32>(model.position + instance.pos, 1.0);
     return out;
 }
 

examples/instances/shader.wgsl

@@ -1,5 +1,6 @@
 struct CameraUniform {
-    view_proj: mat4x4<f32>,
+    view: mat4x4<f32>,
+    proj: mat4x4<f32>,
 };
 @group(0) @binding(0) var<uniform> camera: CameraUniform;
 
@@ -24,7 +25,7 @@ fn vs_main(
     out.position = model.position;
     out.normal = model.normal;
     out.color = model.color;
-    out.clip_position = camera.view_proj * vec4<f32>(model.position, 1.0);
+    out.clip_position = camera.proj * camera.view * vec4<f32>(model.position, 1.0);
     return out;
 }
 

examples/shading/shader.wgsl

@@ -1,5 +1,6 @@
 struct CameraUniform {
-    view_proj: mat4x4<f32>,
+    view: mat4x4<f32>,
+    proj: mat4x4<f32>,
 };
 @group(0) @binding(0) var<uniform> camera: CameraUniform;
 
@@ -19,7 +20,7 @@ fn vs_main(
 ) -> VertexOutput {
     var out: VertexOutput;
     out.color = model.color;
-    out.clip_position = camera.view_proj * vec4<f32>(model.position, 1.0);
+    out.clip_position = camera.proj * camera.view * vec4<f32>(model.position, 1.0);
     return out;
 }
 

examples/wireframe/shader.wgsl

@@ -19,25 +19,31 @@ pub const OPENGL_TO_WGPU_MATRIX: cgmath::Matrix4<f32> = cgmath::Matrix4::new(
 pub struct CameraUniform {
     // We can't use cgmath with bytemuck directly so we'll have
     // to convert the Matrix4 into a 4x4 f32 array
-    view_proj: [[f32; 4]; 4],
+    view: [[f32; 4]; 4],
+    proj: [[f32; 4]; 4],
 }
 
 impl CameraUniform {
     pub fn new() -> Self {
         Self {
-            view_proj: cgmath::Matrix4::identity().into(),
+            view: cgmath::Matrix4::identity().into(),
+            proj: cgmath::Matrix4::identity().into(),
         }
     }
 
-    pub fn update_view_proj(&mut self, matrix: cgmath::Matrix4<f32>) {
-        self.view_proj = matrix.into();
+    pub fn update_proj(&mut self, matrix: cgmath::Matrix4<f32>) {
+        self.proj = matrix.into();
+    }
+
+    pub fn update_view(&mut self, matrix: cgmath::Matrix4<f32>) {
+        self.view = matrix.into();
     }
 
     pub fn desc() -> wgpu::BindGroupLayoutDescriptor<'static> {
         wgpu::BindGroupLayoutDescriptor {
             entries: &[wgpu::BindGroupLayoutEntry {
                 binding: 0,
-                visibility: wgpu::ShaderStages::VERTEX,
+                visibility: wgpu::ShaderStages::VERTEX_FRAGMENT,
                 ty: wgpu::BindingType::Buffer {
                     ty: wgpu::BufferBindingType::Uniform,
                     has_dynamic_offset: false,
@@ -123,8 +129,9 @@ impl OrbitCamera {
         let pos = cgmath::Point3::from_vec(pos.to_vec() + self.target.to_vec());
 
         let view = cgmath::Matrix4::look_at_rh(pos, self.target, self.up);
-        let projection_matrix = OPENGL_TO_WGPU_MATRIX * proj * view;
-        self.uniform.update_view_proj(projection_matrix);
+        let projection_matrix = OPENGL_TO_WGPU_MATRIX * proj;
+        self.uniform.update_proj(projection_matrix);
+        self.uniform.update_view(view);
         context
             .queue()
             .write_buffer(&self.buffer, 0, bytemuck::cast_slice(&[self.uniform]));