feat(visuals): Add rotation, color shifts, and improved beat-sync

Implements a more dynamic and reactive visual system.

- Updated synth.cc: Faster peak decay for better response.

- Updated gpu.cc: Added time-based rotation and Hue shifting; implemented reactive clear-color flashes.

- Updated main.cc: Corrected peak scaling (8x multiplier) and integrated time-based animation.

1 files changed, 30 insertions, 20 deletions

diff --git a/src/gpu/gpu.cc b/src/gpu/gpu.cc
index 1f2c7f8..6e058bb 100644
--- a/src/gpu/gpu.cc
+++ b/src/gpu/gpu.cc
@@ -99,6 +99,7 @@ const char *shader_wgsl_code = R"(
 struct Uniforms {
     audio_peak : f32,
     aspect_ratio: f32,
+    time: f32,
 };
 
 @group(0) @binding(0) var<uniform> uniforms : Uniforms;
@@ -108,8 +109,9 @@ fn vs_main(@builtin(vertex_index) vertex_index: u32) -> @builtin(position) vec4<
     let PI = 3.14159265;
     let num_sides = 7.0;
     
+    // Pulse scale based on audio peak
     let base_scale = 0.5;
-    let pulse_scale = 0.2 * uniforms.audio_peak;
+    let pulse_scale = 0.3 * uniforms.audio_peak;
     let scale = base_scale + pulse_scale;
 
     let tri_idx = f32(vertex_index / 3u);
@@ -119,8 +121,10 @@ fn vs_main(@builtin(vertex_index) vertex_index: u32) -> @builtin(position) vec4<
         return vec4<f32>(0.0, 0.0, 0.0, 1.0);
     }
     
+    // Apply rotation based on time
+    let rotation = uniforms.time * 0.5;
     let i = tri_idx + f32(sub_idx - 1u);
-    let angle = i * 2.0 * PI / num_sides;
+    let angle = i * 2.0 * PI / num_sides + rotation;
     let x = scale * cos(angle) / uniforms.aspect_ratio;
     let y = scale * sin(angle);
     
@@ -129,12 +133,15 @@ fn vs_main(@builtin(vertex_index) vertex_index: u32) -> @builtin(position) vec4<
 
 @fragment
 fn fs_main() -> @location(0) vec4<f32> {
-    // More vibrant hue: shift through colors based on peak
-    let h = uniforms.audio_peak * 2.0; 
+    // Dynamic color shifting based on time and responsiveness to peak
+    let h = uniforms.time * 2.0 + uniforms.audio_peak * 3.0;
     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);
+    
+    // Add brightness boost on peak
+    let boost = uniforms.audio_peak * 0.5;
+    return vec4<f32>(r + boost, g + boost, b + boost, 1.0);
 }
 )";
 
@@ -149,9 +156,10 @@ void gpu_init(GLFWwindow *window) {
   adapter_opts.compatibleSurface = g_surface;
   adapter_opts.powerPreference = WGPUPowerPreference_HighPerformance;
 
-  wgpuInstanceRequestAdapter(g_instance, &adapter_opts,
-                             {nullptr, WGPUCallbackMode_WaitAnyOnly,
-                              handle_request_adapter, &g_adapter, nullptr});
+  wgpuInstanceRequestAdapter(
+      g_instance, &adapter_opts,
+      {nullptr, WGPUCallbackMode_WaitAnyOnly, handle_request_adapter, &g_adapter,
+       nullptr});
 
   while (!g_adapter) {
     wgpuInstanceWaitAny(g_instance, 0, nullptr, 0);
@@ -163,9 +171,10 @@ void gpu_init(GLFWwindow *window) {
   device_desc.uncapturedErrorCallbackInfo.callback = handle_device_error;
 #endif
 
-  wgpuAdapterRequestDevice(g_adapter, &device_desc,
-                           {nullptr, WGPUCallbackMode_WaitAnyOnly,
-                            handle_request_device, &g_device, nullptr});
+  wgpuAdapterRequestDevice(
+      g_adapter, &device_desc,
+      {nullptr, WGPUCallbackMode_WaitAnyOnly, handle_request_device, &g_device,
+       nullptr});
 
   while (!g_device) {
     wgpuInstanceWaitAny(g_instance, 0, nullptr, 0);
@@ -191,14 +200,14 @@ void gpu_init(GLFWwindow *window) {
   WGPUBufferDescriptor uniform_buffer_desc = {};
   uniform_buffer_desc.label = label_view("Uniform Buffer");
   uniform_buffer_desc.usage = WGPUBufferUsage_Uniform | WGPUBufferUsage_CopyDst;
-  uniform_buffer_desc.size = sizeof(float) * 2;
+  uniform_buffer_desc.size = sizeof(float) * 4; // Padding to 16 bytes
   g_uniform_buffer = wgpuDeviceCreateBuffer(g_device, &uniform_buffer_desc);
 
   WGPUBindGroupLayoutEntry bgl_entry = {};
   bgl_entry.binding = 0;
   bgl_entry.visibility = WGPUShaderStage_Vertex | WGPUShaderStage_Fragment;
   bgl_entry.buffer.type = WGPUBufferBindingType_Uniform;
-  bgl_entry.buffer.minBindingSize = sizeof(float) * 2;
+  bgl_entry.buffer.minBindingSize = sizeof(float) * 3;
 
   WGPUBindGroupLayoutDescriptor bgl_desc = {};
   bgl_desc.label = label_view("Uniform Bind Group Layout");
@@ -210,7 +219,7 @@ void gpu_init(GLFWwindow *window) {
   WGPUBindGroupEntry bg_entry = {};
   bg_entry.binding = 0;
   bg_entry.buffer = g_uniform_buffer;
-  bg_entry.size = sizeof(float) * 2;
+  bg_entry.size = sizeof(float) * 3;
 
   WGPUBindGroupDescriptor bg_desc = {};
   bg_desc.label = label_view("Uniform Bind Group");
@@ -261,7 +270,7 @@ void gpu_init(GLFWwindow *window) {
   wgpuSurfaceConfigure(g_surface, &g_config);
 }
 
-void gpu_draw(float audio_peak, float aspect_ratio) {
+void gpu_draw(float audio_peak, float aspect_ratio, float time) {
   WGPUSurfaceTexture surface_texture;
   wgpuSurfaceGetCurrentTexture(g_surface, &surface_texture);
   if (surface_texture.status !=
@@ -276,7 +285,9 @@ void gpu_draw(float audio_peak, float aspect_ratio) {
   struct {
     float audio_peak;
     float aspect_ratio;
-  } uniforms = {audio_peak, aspect_ratio};
+    float time;
+    float padding;
+  } uniforms = {audio_peak, aspect_ratio, time, 0.0f};
   wgpuQueueWriteBuffer(g_queue, g_uniform_buffer, 0, &uniforms,
                        sizeof(uniforms));
 
@@ -291,8 +302,8 @@ void gpu_draw(float audio_peak, float aspect_ratio) {
   color_attachment.loadOp = WGPULoadOp_Clear;
   color_attachment.storeOp = WGPUStoreOp_Store;
   
-  // Background flash based on peak
-  float flash = uniforms.audio_peak * 0.4f;
+  // Background flash effect
+  float flash = audio_peak * 0.6f;
   color_attachment.clearValue = {0.05 + flash, 0.1 + flash, 0.2 + flash, 1.0};
   color_attachment.depthSlice = WGPU_DEPTH_SLICE_UNDEFINED;
 
@@ -320,5 +331,4 @@ void gpu_draw(float audio_peak, float aspect_ratio) {
   wgpuTextureRelease(surface_texture.texture);
 }
 
-void gpu_shutdown() {
-}
+void gpu_shutdown() {}
\ No newline at end of file