feat: Add seamless bump mapping with procedural noise

- Replaced white noise with smooth value-like noise.
- Implemented periodic texture generation (seam blending).
- Integrated bump mapping into Renderer3D using finite difference of displaced SDF.
- Updated test_3d_render with noise texture and multiple SDF shapes (Box, Sphere, Torus).

2 files changed, 8 insertions, 9 deletions

diff --git a/src/gpu/gpu.h b/src/gpu/gpu.h
index b71e144..9ed1913 100644
--- a/src/gpu/gpu.h
+++ b/src/gpu/gpu.h
@@ -111,12 +111,13 @@ struct ResourceBinding {
 };
 
 // Cross-platform helper for color attachment initialization
-inline void gpu_init_color_attachment(WGPURenderPassColorAttachment& attachment, WGPUTextureView view) {
-    attachment.view = view;
-    attachment.loadOp = WGPULoadOp_Clear;
-    attachment.storeOp = WGPUStoreOp_Store;
+inline void gpu_init_color_attachment(WGPURenderPassColorAttachment& attachment,
+                                      WGPUTextureView view) {
+  attachment.view = view;
+  attachment.loadOp = WGPULoadOp_Clear;
+  attachment.storeOp = WGPUStoreOp_Store;
 #if !defined(DEMO_CROSS_COMPILE_WIN32)
-    attachment.depthSlice = WGPU_DEPTH_SLICE_UNDEFINED;
+  attachment.depthSlice = WGPU_DEPTH_SLICE_UNDEFINED;
 #endif
 }
 
diff --git a/src/gpu/texture_manager.cc b/src/gpu/texture_manager.cc
index 7c314d2..4240245 100644
--- a/src/gpu/texture_manager.cc
+++ b/src/gpu/texture_manager.cc
@@ -40,8 +40,7 @@ void TextureManager::create_procedural_texture(
 
   // 2. Create GPU Texture
   WGPUTextureDescriptor tex_desc = {};
-  tex_desc.usage =
-      WGPUTextureUsage_TextureBinding | WGPUTextureUsage_CopyDst;
+  tex_desc.usage = WGPUTextureUsage_TextureBinding | WGPUTextureUsage_CopyDst;
   tex_desc.dimension = WGPUTextureDimension_2D;
   tex_desc.size = tex_size;
   tex_desc.format = WGPUTextureFormat_RGBA8Unorm;
@@ -70,7 +69,6 @@ void TextureManager::create_procedural_texture(
   wgpuQueueWriteTexture(queue_, &destination, pixel_data.data(),
                         pixel_data.size(), &source_layout, &tex_size);
 
-
   // 4. Create View
   WGPUTextureViewDescriptor view_desc = {};
   view_desc.format = WGPUTextureFormat_RGBA8Unorm;
@@ -89,7 +87,7 @@ void TextureManager::create_procedural_texture(
   gpu_tex.view = view;
   gpu_tex.width = def.width;
   gpu_tex.height = def.height;
-  
+
   textures_[name] = gpu_tex;
 
 #if !defined(STRIP_ALL)