From f12b5ebc74825817df54677e261b92200bfac84a Mon Sep 17 00:00:00 2001
From: skal <pascal.massimino@gmail.com>
Date: Wed, 28 Jan 2026 10:26:12 +0100
Subject: feat(visuals): Enhance colors and add background flashes

Improves the audio-visual synchronization by increasing peak amplification and adding dynamic background flashes.

- src/gpu/gpu.cc: Updated fragment shader with more vibrant hue calculation and implemented reactive clear color for flashes.

- src/main.cc: Increased peak multiplier to 150x and added non-linear boost for strong peaks.
---
 src/gpu/gpu.cc | 14 +++++++++-----
 src/main.cc    | 10 ++++++++--
 2 files changed, 17 insertions(+), 7 deletions(-)

(limited to 'src')

diff --git a/src/gpu/gpu.cc b/src/gpu/gpu.cc
index 43aef7c..1f2c7f8 100644
--- a/src/gpu/gpu.cc
+++ b/src/gpu/gpu.cc
@@ -129,10 +129,11 @@ fn vs_main(@builtin(vertex_index) vertex_index: u32) -> @builtin(position) vec4<
 
 @fragment
 fn fs_main() -> @location(0) vec4<f32> {
-    let hue = uniforms.audio_peak * 0.5;
-    let r = sin(hue + 0.0) * 0.5 + 0.5;
-    let g = sin(hue + 2.0) * 0.5 + 0.5;
-    let b = sin(hue + 4.0) * 0.5 + 0.5;
+    // More vibrant hue: shift through colors based on peak
+    let h = uniforms.audio_peak * 2.0; 
+    let r = sin(h + 0.0) * 0.5 + 0.5;
+    let g = sin(h + 2.0) * 0.5 + 0.5;
+    let b = sin(h + 4.0) * 0.5 + 0.5;
     return vec4<f32>(r, g, b, 1.0);
 }
 )";
@@ -289,7 +290,10 @@ void gpu_draw(float audio_peak, float aspect_ratio) {
   color_attachment.resolveTarget = nullptr;
   color_attachment.loadOp = WGPULoadOp_Clear;
   color_attachment.storeOp = WGPUStoreOp_Store;
-  color_attachment.clearValue = {0.1, 0.2, 0.3, 1.0};
+  
+  // Background flash based on peak
+  float flash = uniforms.audio_peak * 0.4f;
+  color_attachment.clearValue = {0.05 + flash, 0.1 + flash, 0.2 + flash, 1.0};
   color_attachment.depthSlice = WGPU_DEPTH_SLICE_UNDEFINED;
 
   WGPURenderPassDescriptor render_pass_desc = {};
diff --git a/src/main.cc b/src/main.cc
index f612868..d564de0 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -133,8 +133,14 @@ int main(int argc, char **argv) {
     glfwGetFramebufferSize(platform_get_window(), &width, &height);
     float aspect_ratio = (float)width / (float)height;
 
-    float visual_peak = fminf(synth_get_output_peak() * 80.0f, 1.0f);
-    gpu_draw(visual_peak, aspect_ratio);
+    // Stronger amplification for visuals
+    float raw_peak = synth_get_output_peak();
+    float visual_peak = raw_peak * 150.0f;
+    
+    // Add a non-linear boost for loud peaks to make flashes pop
+    if (visual_peak > 0.5f) visual_peak += (visual_peak - 0.5f) * 0.5f;
+
+    gpu_draw(fminf(visual_peak, 1.0f), aspect_ratio);
     audio_update();
   }
 
-- 
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