some tweaking

1 files changed, 10 insertions, 6 deletions

diff --git a/workspaces/main/shaders/gaussian_blur.wgsl b/workspaces/main/shaders/gaussian_blur.wgsl
index 22e467f..4e845ff 100644
--- a/workspaces/main/shaders/gaussian_blur.wgsl
+++ b/workspaces/main/shaders/gaussian_blur.wgsl
@@ -1,3 +1,5 @@
+// 5x5 gaussian blur
+
 @group(0) @binding(0) var smplr: sampler;
 @group(0) @binding(1) var txt: texture_2d<f32>;
 
@@ -6,6 +8,8 @@
 
 struct GaussianBlurParams {
     strength: f32,
+    strength_audio: f32,
+    stretch: f32,  // dir_y / dir_x
     _pad: f32,
 };
 
@@ -13,17 +17,17 @@ struct GaussianBlurParams {
 @group(0) @binding(3) var<uniform> params: GaussianBlurParams;
 
 @fragment fn fs_main(@builtin(position) p: vec4<f32>) -> @location(0) vec4<f32> {
-    let uv = p.xy / uniforms.resolution;
-    var res = vec4<f32>(0.0);
-
     // Parameterized strength + dramatic beat pulsation
-    let pulse = 0.5 + uniforms.audio_intensity * 2.0;  // Pulsate between 0.5x and 2.5x with beat
+    let pulse = 1.0 + uniforms.audio_intensity * params.strength_audio;  // Pulsate beat
     let size = params.strength * pulse;
+    let dir = vec2<f32>(1., params.stretch) * size / uniforms.resolution.x;
 
+    let uv = p.xy / uniforms.resolution;
+    var res = vec4<f32>(0.0);
     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.resolution.x);
+            res += textureSample(txt, smplr, uv + vec2<f32>(x, y) * dir);
         }
     }
-    return res / 25.0;
+    return res * (1. / 25.0);
 }