From a522e7738d75e84cc1ee1491a098421622ef1918 Mon Sep 17 00:00:00 2001
From: yum <yum.food.vr@gmail.com>
Date: Fri, 11 Apr 2025 19:17:06 -0700
Subject: add rough ability to nudge tessellation heightmap direction

---
 math.cginc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'math.cginc')

diff --git a/math.cginc b/math.cginc
index 6c48a2c..f2b64fa 100644
--- a/math.cginc
+++ b/math.cginc
@@ -16,7 +16,7 @@ float pow5(float x)
 }
 
 float wrapNoL(float NoL, float k) {
-#if 1
+#if 0
 		// https://www.iro.umontreal.ca/~derek/files/jgt_wrap_final.pdf
     return pow(max(1E-4, (NoL + k) / (1 + k)), 1 + k);
 #else
@@ -242,4 +242,8 @@ float4 get_quaternion(float3 axis_normal, float theta) {
   return float4(axis_normal * sin(theta / 2), cos(theta / 2));
 }
 
+void calcNormalInScreenSpace(inout float3 normal, float3 objPos) {
+  normal = normalize(cross(ddy(objPos), ddx(objPos)));
+}
+
 #endif  // __MATH_INC
-- 
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