Add letter grid gimmick

1 files changed, 12 insertions, 3 deletions

diff --git a/math.cginc b/math.cginc
index 2f05054..f44aa74 100644
--- a/math.cginc
+++ b/math.cginc
@@ -55,7 +55,7 @@ float rand3(float3 p)
     return frac(rand3_hash(p).x);

 }

 

-float2 domainWarp1(float x, uint octaves, float strength, float scale)

+float2 domainWarp1(float x, uint octaves, float strength, float scale, float speed)

 {

   [loop]

   for (uint i = 0; i < octaves; i++) {

@@ -66,14 +66,14 @@ float2 domainWarp1(float x, uint octaves, float strength, float scale)
   return x;

 }

 

-float2 domainWarp2(float2 uv, uint octaves, float strength, float scale)

+float2 domainWarp2(float2 uv, uint octaves, float strength, float scale, float speed)

 {

   uv *= 0.001;

   [loop]

   for (uint i = 0; i < octaves; i++) {

     uv += strength * frac(sin(float2(

       dot(uv * scale, float2(12.9898, 78.233)),

-      dot(uv * scale, float2(36.7539, 50.3658))) * 43758.5453123));

+      dot(uv * scale, float2(36.7539, 50.3658)))) * 43758.5453123);

   }

   uv *= 1000;

   return uv;

@@ -198,4 +198,13 @@ float3 luminance(float3 color) {
   return dot(color, float3(0.2126, 0.7152, 0.0722));

 }

 

+float median(float3 x) {

+  // Get the min and max.

+  float x_min= min(min(x.r, x.g), x.b);

+  float x_max = max(max(x.r, x.g), x.b);

+  

+  // Compute (x.r + x.g + x.b) - (x_min + x_max). This gives us the median.

+  return (x.r + x.g + x.b) - (x_min + x_max);

+}

+

 #endif  // __MATH_INC