refactor: Shader Asset Integration (Task #24)

Extracted all hardcoded WGSL shaders into external assets. Updated AssetManager to handle shader snippets. Refactored Renderer3D, VisualDebug, and Effects to load shaders via the AssetManager, enabling better shader management and composition.

1 files changed, 44 insertions, 0 deletions

diff --git a/assets/final/shaders/particle_render.wgsl b/assets/final/shaders/particle_render.wgsl
new file mode 100644
index 0000000..6f115ec
--- /dev/null
+++ b/assets/final/shaders/particle_render.wgsl
@@ -0,0 +1,44 @@
+struct Particle {
+    pos: vec4<f32>,
+    vel: vec4<f32>,
+    rot: vec4<f32>,
+    color: vec4<f32>,
+};
+
+struct Uniforms {
+    audio_peak: f32,
+    aspect_ratio: f32,
+    time: f32,
+    beat: f32,
+};
+
+@group(0) @binding(0) var<storage, read> particles: array<Particle>;
+@group(0) @binding(1) var<uniform> uniforms: Uniforms;
+
+struct VSOut {
+    @builtin(position) pos: vec4<f32>,
+    @location(0) color: vec4<f32>,
+};
+
+@vertex fn vs_main(@builtin(vertex_index) vi: u32, @builtin(instance_index) ii: u32) -> VSOut {
+    let p = particles[ii];
+    let size = 0.02 + p.pos.z * 0.01 + uniforms.audio_peak * 0.02;
+    var offsets = array<vec2<f32>, 6>(
+        vec2<f32>(-1, -1),
+        vec2<f32>(1, -1),
+        vec2<f32>(-1, 1),
+        vec2<f32>(-1, 1),
+        vec2<f32>(1, -1),
+        vec2<f32>(1, 1)
+    );
+    let offset = offsets[vi];
+    let c = cos(p.rot.x);
+    let s = sin(p.rot.x);
+    let rotated_offset = vec2<f32>(offset.x * c - offset.y * s, offset.x * s + offset.y * c);
+    let pos = vec2<f32>(p.pos.x + rotated_offset.x * size / uniforms.aspect_ratio, p.pos.y + rotated_offset.y * size);
+    return VSOut(vec4<f32>(pos, 0.0, 1.0), p.color * (0.5 + 0.5 * uniforms.audio_peak));
+}
+
+@fragment fn fs_main(@location(0) color: vec4<f32>) -> @location(0) vec4<f32> {
+    return color;
+}