fix(tools/shadertoy): fix Next Steps instructions and update EFFECT_WORKFLOW.md

- Fix assets.txt path: shaders/xxx.wgsl (not ../../src/shaders/)
- Fix shader output path to workspaces/main/shaders/
- Step 5: reference cmake/DemoSourceLists.cmake COMMON_GPU_EFFECTS (not CMakeLists.txt GPU_SOURCES)
- Add step for test_demo_effects.cc

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

1 files changed, 10 insertions, 6 deletions

diff --git a/tools/shadertoy/convert_shadertoy.py b/tools/shadertoy/convert_shadertoy.py
index 22b3276..9df42bb 100755
--- a/tools/shadertoy/convert_shadertoy.py
+++ b/tools/shadertoy/convert_shadertoy.py
@@ -12,7 +12,7 @@
 # Generates:
 #   - src/effects/<effect>_effect.h
 #   - src/effects/<effect>_effect.cc
-#   - src/shaders/<effect>.wgsl
+#   - workspaces/main/shaders/<effect>.wgsl
 #
 # The script performs basic ShaderToy→WGSL conversion:
 #   - Converts types (float→f32, vec2→vec2f, etc.)
@@ -333,7 +333,7 @@ def main():
         print("This will generate:")
         print("  src/effects/<effect>_effect.h")
         print("  src/effects/<effect>_effect.cc")
-        print("  src/shaders/<effect>.wgsl")
+        print("  workspaces/main/shaders/<effect>.wgsl")
         sys.exit(1)
 
     shader_file = sys.argv[1]
@@ -361,7 +361,7 @@ def main():
     repo_root = Path(__file__).parent.parent.parent
     header_path = repo_root / "src" / "effects" / f"{snake_name}_effect.h"
     impl_path = repo_root / "src" / "effects" / f"{snake_name}_effect.cc"
-    shader_path = repo_root / "src" / "shaders" / f"{snake_name}.wgsl"
+    shader_path = repo_root / "workspaces" / "main" / "shaders" / f"{snake_name}.wgsl"
 
     # Generate files
     if shader_only:
@@ -389,7 +389,7 @@ def main():
     print("Next steps (see doc/EFFECT_WORKFLOW.md for details):")
     print()
     print("1. Add shader to workspaces/main/assets.txt:")
-    print(f"   SHADER_{upper_name}, NONE, ../../src/shaders/{snake_name}.wgsl, \"{effect_name} effect\"")
+    print(f"   SHADER_{upper_name}, NONE, shaders/{snake_name}.wgsl, \"{effect_name} effect\"")
     print()
     print("2. Add shader declaration to src/effects/shaders.h:")
     print(f"   extern const char* {snake_name}_shader_wgsl;")
@@ -400,7 +400,7 @@ def main():
     print("4. Include header in src/gpu/demo_effects.h:")
     print(f'   #include "effects/{snake_name}_effect.h"')
     print()
-    print("5. Add to CMakeLists.txt GPU_SOURCES (both headless and normal mode sections):")
+    print("5. Add to cmake/DemoSourceLists.cmake COMMON_GPU_EFFECTS list:")
     print(f"   src/effects/{snake_name}_effect.cc")
     print()
     print("6. Add to timeline in workspaces/main/timeline.seq:")
@@ -410,7 +410,11 @@ def main():
     print("   python3 tools/seq_compiler.py workspaces/main/timeline.seq \\")
     print("     --output src/generated/timeline.cc")
     print()
-    print("8. Build and test:")
+    print("8. Add to src/tests/gpu/test_demo_effects.cc:")
+    print(f'   {{"{effect_name}", std::make_shared<{effect_name}Effect>(')
+    print(f'       fixture.ctx(), inputs, outputs, 0.0f, 1000.0f)}}')
+    print()
+    print("9. Build and test:")
     print("   cmake --build build -j4")
     print("   ./build/demo64k")
     print()