From a4bf31470f7e2855f13d922e3e7ad1c7767d9afd Mon Sep 17 00:00:00 2001
From: yum <yum.food.vr@gmail.com>
Date: Sun, 12 Oct 2025 16:28:53 -0700
Subject: add geometry shader

---
 vertex.cginc | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

(limited to 'vertex.cginc')

diff --git a/vertex.cginc b/vertex.cginc
index 2f5b5f5..58c5209 100644
--- a/vertex.cginc
+++ b/vertex.cginc
@@ -4,22 +4,23 @@
 #include "custom31.hlsl"
 
 void deform(inout float3 objPos) {
+  float t_eps = 1e-9;
 #if defined(_CUSTOM31_XZ_TUBE)
   {
-    float t = _Custom31_XZ_Tube_t;
+    float t = clamp(_Custom31_XZ_Tube_t, -1+t_eps, 1-t_eps);;
     objPos = plane_to_tube(objPos.xyz, t);
   }
 #endif  // _CUSTOM31_XZ_TUBE
 #if defined(_CUSTOM31_YZ_TUBE)
   {
-    float t = _Custom31_YZ_Tube_t;
+    float t = clamp(_Custom31_YZ_Tube_t, -1+t_eps, 1-t_eps);
     objPos = plane_to_tube(objPos.yxz, t);
     objPos = objPos.yxz;
   }
 #endif  // _CUSTOM31_YZ_TUBE
 #if defined(_CUSTOM31_XY_TUBE)
   {
-    float t = _Custom31_XY_Tube_t;
+    float t = clamp(_Custom31_XY_Tube_t, -1+t_eps, 1-t_eps);
     objPos = plane_to_tube(objPos.xzy, t);
     objPos = objPos.xzy;
   }
-- 
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