From 2e34965e5e48175c5ee6016af1a858f7f3f02c1d Mon Sep 17 00:00:00 2001
From: skal <pascal.massimino@gmail.com>
Date: Wed, 4 Feb 2026 11:56:03 +0100
Subject: feat(gpu): Implement recursive WGSL composition and modularize
 shaders (Task #50)

- Updated ShaderComposer to support recursive #include "snippet_name" with cycle detection.
- Extracted granular WGSL snippets: math/sdf_shapes, math/sdf_utils, render/shadows, render/scene_query, render/lighting_utils.
- Refactored Renderer3D to use #include in shaders, simplifying C++ dependency lists.
- Fixed WGPUShaderSourceWGSL usage on macOS to correctly handle composed shader strings.
- Added comprehensive unit tests for recursive composition in test_shader_composer.
- Verified system stability with test_3d_render and full test suite.
- Marked Task #50 as recurrent for future code hygiene.
---
 assets/final/shaders/math/sdf_shapes.wgsl | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 assets/final/shaders/math/sdf_shapes.wgsl

(limited to 'assets/final/shaders/math/sdf_shapes.wgsl')

diff --git a/assets/final/shaders/math/sdf_shapes.wgsl b/assets/final/shaders/math/sdf_shapes.wgsl
new file mode 100644
index 0000000..31bbe2d
--- /dev/null
+++ b/assets/final/shaders/math/sdf_shapes.wgsl
@@ -0,0 +1,14 @@
+fn sdSphere(p: vec3<f32>, r: f32) -> f32 {
+    return length(p) - r;
+}
+fn sdBox(p: vec3<f32>, b: vec3<f32>) -> f32 {
+    let q = abs(p) - b;
+    return length(max(q, vec3<f32>(0.0))) + min(max(q.x, max(q.y, q.z)), 0.0);
+}
+fn sdTorus(p: vec3<f32>, t: vec2<f32>) -> f32 {
+    let q = vec2<f32>(length(p.xz) - t.x, p.y);
+    return length(q) - t.y;
+}
+fn sdPlane(p: vec3<f32>, n: vec3<f32>, h: f32) -> f32 {
+  return dot(p, n) + h;
+}
-- 
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