Basic fog lighting, refactoring

res/shaders/light_debug.wgsl

@@ -0,0 +1,26 @@
+#include globals.wgsl
+
+struct LightVertexInput {
+    @location(0) position: vec3<f32>,
+};
+
+struct LightVertexOutput {
+    @builtin(position) clip_position: vec4<f32>,
+    @location(0) color: vec3<f32>,
+};
+
+@vertex
+fn vs_main(
+    model: LightVertexInput,
+) -> LightVertexOutput {
+    let scale = 10.0;
+    var out: LightVertexOutput;
+    out.clip_position = camera.proj * camera.view * vec4<f32>(model.position * scale + light.position, 1.0);
+    out.color = light.color.xyz;
+    return out;
+}
+
+@fragment
+fn fs_main(in: LightVertexOutput) -> @location(0) vec4<f32> {
+    return vec4<f32>(in.color, 1.0);
+}