From 5f7dd50b42af43c4cc5e954632cb21c37c33ce37 Mon Sep 17 00:00:00 2001
From: skal <pascal.massimino@gmail.com>
Date: Mon, 2 Feb 2026 19:44:50 +0100
Subject: update TODO and fix shaders.cc

---
 TODO.md                    | 1 +
 src/gpu/effects/shaders.cc | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/TODO.md b/TODO.md
index 6f259e1..30dda64 100644
--- a/TODO.md
+++ b/TODO.md
@@ -19,6 +19,7 @@ This file tracks prioritized tasks with detailed attack plans.
 ## Priority 3: Shader Optimization (Task #21)
 **Goal:** Improve GPU performance and reduce shader source bloat.
 - [ ] **Attack Plan - Normal Factorization:** Create a standard WGSL helper for normal calculation to avoid duplicate code in every effect.
+- [ ] **Tri-planar or bi-planar mapping**: see https://iquilezles.org/articles/biplanar/ for instance
 
 ## Future Goals
 - [ ] **Task #5: Spectrogram Editor**: Web-based visual tool for extreme audio compression.
diff --git a/src/gpu/effects/shaders.cc b/src/gpu/effects/shaders.cc
index 6d86d2b..746392a 100644
--- a/src/gpu/effects/shaders.cc
+++ b/src/gpu/effects/shaders.cc
@@ -40,6 +40,8 @@ fn sdTorus(p: vec3<f32>, t: vec2<f32>) -> f32 {
 fn sdPlane(p: vec3<f32>, n: vec3<f32>, h: f32) -> f32 {
   return dot(p, n) + h;
 }
+)");
+
     sc.RegisterSnippet("lighting", R"(
 fn get_normal_basic(p: vec3<f32>, obj_type: f32) -> vec3<f32> {
     if (obj_type == 1.0) { return normalize(p); }
@@ -64,6 +66,8 @@ fn calc_shadow(ro: vec3<f32>, rd: vec3<f32>, tmin: f32, tmax: f32, skip_idx: u32
     }
     return clamp(res, 0.0, 1.0);
 }
+)");
+
     sc.RegisterSnippet("ray_box", R"(
 struct RayBounds {
     t_entry: f32,
-- 
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