feat(shaders): Standardize all shaders to use CommonUniforms

Define CommonUniforms struct with standard fields:
- resolution: vec2<f32>
- aspect_ratio: f32
- time: f32
- beat: f32
- audio_intensity: f32

Updated 14 shaders to use CommonUniforms:
- Replaced width/height with resolution
- Unified intensity/audio_peak → audio_intensity
- Moved effect-specific params to EffectParams struct
- visual_debug.wgsl now uses GlobalUniforms.view_proj

All shaders now have consistent uniform interface.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

1 files changed, 12 insertions, 10 deletions

diff --git a/assets/final/shaders/gaussian_blur.wgsl b/assets/final/shaders/gaussian_blur.wgsl
index e848c6b..39cbf54 100644
--- a/assets/final/shaders/gaussian_blur.wgsl
+++ b/assets/final/shaders/gaussian_blur.wgsl
@@ -1,18 +1,20 @@
 @group(0) @binding(0) var smplr: sampler;
 @group(0) @binding(1) var txt: texture_2d<f32>;
 
-struct Uniforms {
+struct CommonUniforms {
+    resolution: vec2<f32>,
+    aspect_ratio: f32,
     time: f32,
     beat: f32,
-    intensity: f32,
-    aspect_ratio: f32,
-    width: f32,
-    height: f32,
+    audio_intensity: f32,
+};
+struct EffectParams {
     strength: f32,
     _pad: f32,
 };
 
-@group(0) @binding(2) var<uniform> uniforms: Uniforms;
+@group(0) @binding(2) var<uniform> common: CommonUniforms;
+@group(0) @binding(3) var<uniform> params: EffectParams;
 
 @vertex fn vs_main(@builtin(vertex_index) i: u32) -> @builtin(position) vec4<f32> {
     var pos = array<vec2<f32>, 3>(
@@ -24,16 +26,16 @@ struct Uniforms {
 }
 
 @fragment fn fs_main(@builtin(position) p: vec4<f32>) -> @location(0) vec4<f32> {
-    let uv = p.xy / vec2<f32>(uniforms.width, uniforms.height);
+    let uv = p.xy / common.resolution;
     var res = vec4<f32>(0.0);
 
     // Parameterized strength + dramatic beat pulsation
-    let pulse = 0.5 + uniforms.intensity * 2.0;  // Pulsate between 0.5x and 2.5x with beat
-    let size = uniforms.strength * pulse;
+    let pulse = 0.5 + common.audio_intensity * 2.0;  // Pulsate between 0.5x and 2.5x with beat
+    let size = params.strength * pulse;
 
     for (var x: f32 = -2.0; x <= 2.0; x += 1.0) {
         for (var y: f32 = -2.0; y <= 2.0; y += 1.0) {
-            res += textureSample(txt, smplr, uv + vec2<f32>(x, y) * size / uniforms.width);
+            res += textureSample(txt, smplr, uv + vec2<f32>(x, y) * size / common.resolution.x);
         }
     }
     return res / 25.0;