refactor(3d): Split Renderer3D into modular files and fix compilation.

1 files changed, 54 insertions, 0 deletions

diff --git a/src/3d/renderer_resources.cc b/src/3d/renderer_resources.cc
new file mode 100644
index 0000000..2b001aa
--- /dev/null
+++ b/src/3d/renderer_resources.cc
@@ -0,0 +1,54 @@
+// This file is part of the 64k demo project.
+// It implements the resource management logic for Renderer3D.
+
+#include "3d/renderer.h"
+#include "util/asset_manager_utils.h"
+
+void Renderer3D::create_default_resources() {
+  global_uniform_buffer_ =
+      gpu_create_buffer(device_, sizeof(GlobalUniforms),
+                        WGPUBufferUsage_Uniform | WGPUBufferUsage_CopyDst,
+                        nullptr)
+          .buffer;
+  object_storage_buffer_ =
+      gpu_create_buffer(device_, sizeof(ObjectData) * kMaxObjects,
+                        WGPUBufferUsage_Storage | WGPUBufferUsage_CopyDst,
+                        nullptr)
+          .buffer;
+  bvh_storage_buffer_ =
+      gpu_create_buffer(
+          device_,
+          sizeof(BVHNode) * kMaxObjects * 2, // Capacity for a full tree
+          WGPUBufferUsage_Storage | WGPUBufferUsage_CopyDst, nullptr)
+          .buffer;
+}
+
+const Renderer3D::MeshGpuData*
+Renderer3D::get_or_create_mesh(AssetId asset_id) {
+  auto it = mesh_cache_.find(asset_id);
+  if (it != mesh_cache_.end()) {
+    return &it->second;
+  }
+
+  MeshAsset asset = GetMeshAsset(asset_id);
+  if (!asset.vertices || asset.num_vertices == 0) {
+    return nullptr;
+  }
+
+  MeshGpuData data;
+  data.num_indices = asset.num_indices;
+
+  data.vertex_buffer =
+      gpu_create_buffer(device_, asset.num_vertices * sizeof(MeshVertex),
+                        WGPUBufferUsage_Vertex | WGPUBufferUsage_CopyDst,
+                        asset.vertices)
+          .buffer;
+  data.index_buffer =
+      gpu_create_buffer(device_, asset.num_indices * sizeof(uint32_t),
+                        WGPUBufferUsage_Index | WGPUBufferUsage_CopyDst,
+                        asset.indices)
+          .buffer;
+
+  mesh_cache_[asset_id] = data;
+  return &mesh_cache_[asset_id];
+}