Add fog parameters; add Unity fog to fwd/add passes

1 files changed, 7 insertions, 0 deletions

diff --git a/math.cginc b/math.cginc
index 46e19e1..968f888 100644
--- a/math.cginc
+++ b/math.cginc
@@ -3,6 +3,13 @@
 #ifndef __MATH_INC
 #define __MATH_INC
 
+// Hacky parameterizable whiteout blending. Probably some big mistakes but it
+// passes the eyeball test.
+// At w=0.5, this looks kinda like whiteout blending.
+// At w=0, this returns n0.
+// At w=1, this returns n1.
+#define MY_BLEND_NORMALS(n0, n1, w) normalize(float3((n0.xy * (1 - w) + n1.xy * w), lerp(1, n0.z, (1-w)) * lerp(1, n1.z, w)))
+
 // Complex numbers
 typedef float2 complex;