Continue work on glitter

1 files changed, 35 insertions, 0 deletions

diff --git a/hashwithoutsine.cginc b/hashwithoutsine.cginc
new file mode 100644
index 0000000..78c6489
--- /dev/null
+++ b/hashwithoutsine.cginc
@@ -0,0 +1,35 @@
+/* Copyright (c)2014 David Hoskins.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.*/
+
+// Source:
+// https://www.shadertoy.com/view/4djSRW
+
+float2 hash22_fast(float2 p) {
+  float3 p3 = frac(p.xyx * float3(0.1031, 0.1030, 0.0973));
+  p3 += dot(p3, p3.yzx + 33.33);
+  return frac((p3.xx+p3.yz)*p3.zy);
+}
+
+float3 hash33_fast(float3 p) {
+  p = frac(p * float3(0.1031, 0.1030, 0.0973));
+  p += dot(p, p.yxz + 33.33);
+  return frac((p.xxy + p.yxx) * p.zyx);
+}
+