From 195df414b5310dec05d509dcc7d91b786419e360 Mon Sep 17 00:00:00 2001
From: yum <yum.food.vr@gmail.com>
Date: Sat, 1 Nov 2025 12:33:40 -0700
Subject: deform rd with tangent path & scale by jac_det

---
 ray_marching.cginc | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

(limited to 'ray_marching.cginc')

diff --git a/ray_marching.cginc b/ray_marching.cginc
index 66d0845..01011c6 100644
--- a/ray_marching.cginc
+++ b/ray_marching.cginc
@@ -29,11 +29,9 @@ RayMarchResult ray_march(v2f i) {
   GetRoRd(i, ro, rd);
 
 #if defined(_VERTEX_DEFORMATION)
-  float3 rd_perp = i.normal * dot(i.normal, rd);
-  float3 rd_tan  = rd - rd_perp;
   float3 tmp = ro;
-  undeform_normal(tmp, rd_perp, rd_tan);
-  rd = rd_perp + rd_tan;
+  undeform_normal(tmp, tmp, rd);
+  rd = normalize(rd);
 #endif
 
   const float kMinDist = 1e-3;
-- 
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