1 files changed, 55 insertions, 0 deletions
diff --git a/src/gpu/effects/rotating_cube_effect.h b/src/gpu/effects/rotating_cube_effect.h
new file mode 100644
index 0000000..89b3fa6
--- /dev/null
+++ b/src/gpu/effects/rotating_cube_effect.h
@@ -0,0 +1,55 @@
+// This file is part of the 64k demo project.
+// It defines RotatingCubeEffect for rendering a bump-mapped rotating cube.
+// Uses auxiliary texture masking to render only inside a circular region.
+
+#ifndef ROTATING_CUBE_EFFECT_H_
+#define ROTATING_CUBE_EFFECT_H_
+
+#include "gpu/effect.h"
+#include "gpu/gpu.h"
+#include "util/mini_math.h"
+#include <string>
+
+class RotatingCubeEffect : public Effect {
+ public:
+  RotatingCubeEffect(const GpuContext& ctx);
+  ~RotatingCubeEffect() override;
+
+  void init(MainSequence* demo) override;
+  void render(WGPURenderPassEncoder pass, float time, float beat,
+              float intensity, float aspect_ratio) override;
+
+ private:
+  struct Uniforms {
+    mat4 view_proj;
+    mat4 inv_view_proj;
+    vec4 camera_pos_time;
+    vec4 params;
+    vec2 resolution;
+    vec2 padding;
+  };
+
+  struct ObjectData {
+    mat4 model;
+    mat4 inv_model;
+    vec4 color;
+    vec4 params;
+  };
+
+  MainSequence* demo_ = nullptr;
+  WGPURenderPipeline pipeline_ = nullptr;
+  WGPUBindGroup bind_group_0_ = nullptr;
+  WGPUBindGroup bind_group_1_ = nullptr;
+  GpuBuffer uniform_buffer_;
+  GpuBuffer object_buffer_;
+  WGPUTexture noise_texture_ = nullptr;
+  WGPUTextureView noise_view_ = nullptr;
+  WGPUSampler noise_sampler_ = nullptr;
+  WGPUSampler mask_sampler_ = nullptr;
+  float rotation_ = 0.0f;
+
+  // Store composed shader to keep it alive for WebGPU
+  std::string composed_shader_;
+};
+
+#endif /* ROTATING_CUBE_EFFECT_H_ */