From a42fba99801e7085b9e6cb7d19016e6f44b35031 Mon Sep 17 00:00:00 2001
From: skal <pascal.massimino@gmail.com>
Date: Mon, 2 Feb 2026 17:19:48 +0100
Subject: fix(3d): Resolve spherical distortion in floor grid texture

- Corrected world-space position calculation in SDF fragment shader.
- Transformed local hit point back to world space using the model matrix.
- Restored accurate planar p.xz mapping for the floor grid.
---
 src/3d/renderer.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/3d/renderer.cc b/src/3d/renderer.cc
index abd26de..8676db4 100644
--- a/src/3d/renderer.cc
+++ b/src/3d/renderer.cc
@@ -212,8 +212,8 @@ fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
         }
         if (!hit) { discard; }
         
-        p = ro_world + rd_world * t; // Use world t for final position
         let q_hit = ro_local + rd_local * t;
+        p = (obj.model * vec4<f32>(q_hit, 1.0)).xyz; // Correct world position
         
         // Calculate normal with bump mapping
         let e = vec2<f32>(0.005, 0.0);
-- 
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