feat: Implement 3D system and procedural texture manager

- Extended mini_math.h with mat4 multiplication and affine transforms.
- Implemented TextureManager for runtime procedural texture generation and GPU upload.
- Added 3D system components: Camera, Object, Scene, and Renderer3D.
- Created test_3d_render mini-demo for interactive 3D verification.
- Fixed WebGPU validation errors regarding depthSlice and unimplemented WaitAny.

1 files changed, 27 insertions, 0 deletions

diff --git a/src/procedural/generator.h b/src/procedural/generator.h
new file mode 100644
index 0000000..a5ced68
--- /dev/null
+++ b/src/procedural/generator.h
@@ -0,0 +1,27 @@
+// This file is part of the 64k demo project.
+// It defines the interface for procedural texture generation.
+// Used to generate texture data at runtime.
+
+#pragma once
+
+#include <cstdint>
+#include <vector>
+
+// Procedural generation function signature
+// buffer: Pointer to RGBA8 buffer (size w * h * 4)
+// w, h: Dimensions
+// params: Arbitrary float parameters for the generator
+typedef void (*ProcGenFunc)(uint8_t* buffer, int w, int h, const float* params,
+                            int num_params);
+
+namespace procedural {
+
+// Example: Simple noise generator
+void gen_noise(uint8_t* buffer, int w, int h, const float* params,
+               int num_params);
+
+// Example: Grid pattern
+void gen_grid(uint8_t* buffer, int w, int h, const float* params,
+              int num_params);
+
+} // namespace procedural