Use cube for light debug mesh instead of entirety of Sponza...

README.md

@@ -62,3 +62,5 @@ For miniserve, see:
 ## Assets
 - Sponza
   - Obtained from [KhronosGroup glTF-Sample-Models repository](https://github.com/KhronosGroup/glTF-Sample-Models/tree/16e2408d31e06d4b0bcf6123db472e802d71f081/2.0/Sponza), converted to .glb
+- Cube
+  - Obtained from [KhronosGroup glTF-Sample-Models repository](https://github.com/KhronosGroup/glTF-Sample-Models/tree/16e2408d31e06d4b0bcf6123db472e802d71f081/2.0/Cube), converted to .glb

res/shaders/light.wgsl

@@ -28,7 +28,7 @@ struct VertexOutput {
 fn vs_main(
     model: VertexInput,
 ) -> VertexOutput {
-    let scale = 0.01;
+    let scale = 10.0;
     var out: VertexOutput;
     out.clip_position = camera.proj * camera.view * vec4<f32>(model.position * scale + light.position, 1.0);
     out.color = light.color;

src/core/state.rs

@@ -29,6 +29,7 @@ pub struct State {
     instance_buffer: wgpu::Buffer,
     depth_texture: Texture,
     model: Model,
+    light_model: Model,
     light_uniform: LightUniform,
     light_buffer: wgpu::Buffer,
     light_debug_pass: RenderPass,
@@ -222,6 +223,15 @@ impl State {
         .await
         .unwrap();
 
+        let light_model = resources::load_model_gltf(
+            "models/Cube.glb",
+            &device,
+            &queue,
+            &texture_bind_group_layout,
+        )
+        .await
+        .unwrap();
+
         let instances = vec![Instance {
             position: [0.0, 0.0, 0.0].into(),
             rotation: cgmath::Quaternion::one(),
@@ -276,6 +286,7 @@ impl State {
             instance_buffer,
             depth_texture,
             model,
+            light_model,
             light_uniform,
             light_buffer,
             light_debug_pass,
@@ -366,16 +377,14 @@ impl State {
                 }),
             });
 
-            // TODO: only use for geom, not lights
-            render_pass.set_vertex_buffer(1, self.instance_buffer.slice(..));
-
             render_pass.set_pipeline(&self.light_debug_pass.pipeline);
             render_pass.draw_light_model(
-                &self.model,
+                &self.light_model,
                 &self.camera_bind_group,
                 &self.light_bind_group,
             );
 
+            render_pass.set_vertex_buffer(1, self.instance_buffer.slice(..));
             render_pass.set_pipeline(&self.geometry_pass.pipeline);
             render_pass.draw_model_instanced(
                 &self.model,