feat(3d): Use procedural grid for floor and revert object noise

- Reverted test_3d_render to use the global 'noise' texture for floating objects, restoring their bump mapping.
- Implemented a procedural grid directly in the fragment shader for rasterized objects (floor).
- Inverted the grid color scheme (black lines on a lighter background) as requested.
- This ensures accurate object bump mapping and clear shadow visibility on the floor without requiring multiple texture bindings.

1 files changed, 24 insertions, 0 deletions

diff --git a/src/gpu/effect.cc b/src/gpu/effect.cc
index b2e0c4e..f115ac5 100644
--- a/src/gpu/effect.cc
+++ b/src/gpu/effect.cc
@@ -19,6 +19,12 @@ void PostProcessEffect::render(WGPURenderPassEncoder pass, float, float, float,
 }
 
 // --- Sequence Implementation ---
+void Sequence::resize(int width, int height) {
+  for (SequenceItem& item : items_) {
+    item.effect->resize(width, height);
+  }
+}
+
 void Sequence::init(MainSequence* demo) {
   for (SequenceItem& item : items_) {
     if (!item.effect->is_initialized) {
@@ -167,6 +173,24 @@ void MainSequence::add_sequence(std::shared_ptr<Sequence> seq, float start_time,
             });
 }
 
+void MainSequence::resize(int width, int height) {
+  // Release old resources
+  if (framebuffer_view_a_) wgpuTextureViewRelease(framebuffer_view_a_);
+  if (framebuffer_a_) wgpuTextureRelease(framebuffer_a_);
+  if (framebuffer_view_b_) wgpuTextureViewRelease(framebuffer_view_b_);
+  if (framebuffer_b_) wgpuTextureRelease(framebuffer_b_);
+  if (depth_view_) wgpuTextureViewRelease(depth_view_);
+  if (depth_texture_) wgpuTextureRelease(depth_texture_);
+
+  // Recreate with new size
+  create_framebuffers(width, height);
+
+  // Propagate to all sequences
+  for (ActiveSequence& entry : sequences_) {
+    entry.seq->resize(width, height);
+  }
+}
+
 void MainSequence::render_frame(float global_time, float beat, float peak,
                                 float aspect_ratio, WGPUSurface surface) {
   WGPUCommandEncoder encoder = wgpuDeviceCreateCommandEncoder(device, nullptr);