fix(tools/shadertoy): sync templates and script to current codebase conventions

- template.h/cc: new Effect constructor/render signatures, RAII wrappers,
  HEADLESS_RETURN_IF_NULL, #pragma once
- template.wgsl: sequence_uniforms + render/fullscreen_uv_vs includes,
  UniformsSequenceParams at binding 2, VertexOutput in fs_main
- convert_shadertoy.py: paths src/effects/ + src/shaders/, new Effect
  pattern (create_post_process_pipeline, pp_update_bind_group), correct
  field names (beat_time/beat_phase), updated next-steps instructions
- README.md: streamlined to quick-ref; accurate GLSL→WGSL table and uniforms

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 12 insertions, 27 deletions

diff --git a/tools/shadertoy/template.h b/tools/shadertoy/template.h
index 74be9f2..5f105d5 100644
--- a/tools/shadertoy/template.h
+++ b/tools/shadertoy/template.h
@@ -2,40 +2,25 @@
 // ShaderToy effect boilerplate - REPLACE THIS LINE WITH DESCRIPTION
 // TODO: Update description, rename class, adjust parameters
 
-#ifndef SHADERTOY_EFFECT_H_
-#define SHADERTOY_EFFECT_H_
+#pragma once
 
 #include "gpu/effect.h"
-#include "gpu/post_process_helper.h"
-#include "gpu/uniform_helper.h"
+#include "gpu/wgpu_resource.h"
 
 // TODO: Rename class to match your effect (e.g., TunnelEffect, PlasmaEffect)
 class ShaderToyEffect : public Effect {
  public:
-  // TODO: Add constructor parameters for tunable values
-  ShaderToyEffect(const GpuContext& ctx);
-  ~ShaderToyEffect() override;
+  // TODO: Rename class, keep same constructor signature
+  ShaderToyEffect(const GpuContext& ctx,
+                  const std::vector<std::string>& inputs,
+                  const std::vector<std::string>& outputs,
+                  float start_time, float end_time);
 
-  void init(MainSequence* demo) override;
-  void render(WGPURenderPassEncoder pass, float time, float beat,
-              float intensity, float aspect_ratio) override;
+  void render(WGPUCommandEncoder encoder,
+              const UniformsSequenceParams& params,
+              NodeRegistry& nodes) override;
 
  private:
-  // TODO: Add effect-specific parameters here
-  // Must match WGSL struct exactly - use padding for 16-byte alignment
-  struct ShaderToyParams {
-    float param1;
-    float param2;
-    float _pad[2]; // Padding to 16 bytes
-  };
-  static_assert(sizeof(ShaderToyParams) == 16,
-                "ShaderToyParams must be 16 bytes for WGSL alignment");
-
-  MainSequence* demo_ = nullptr;
-  WGPURenderPipeline pipeline_ = nullptr;
-  WGPUBindGroup bind_group_ = nullptr;
-  WGPUSampler sampler_ = nullptr;
-  UniformBuffer<ShaderToyParams> params_;
+  RenderPipeline pipeline_;
+  BindGroup bind_group_;
 };
-
-#endif /* SHADERTOY_EFFECT_H_ */