You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
80 lines
1.9 KiB
Plaintext
80 lines
1.9 KiB
Plaintext
2 weeks ago
|
/******************************************************************************/
|
||
|
|
/*
|
||
|
|
Project - MudBun
|
||
|
|
Publisher - Long Bunny Labs
|
||
|
|
http://LongBunnyLabs.com
|
||
|
|
Author - Ming-Lun "Allen" Chou
|
||
|
|
http://AllenChou.net
|
||
|
|
|
||
|
|
Based on project "webgl-noise" by Ashima Arts.
|
||
|
|
Description : Array and textureless GLSL 2D simplex noise function.
|
||
|
|
Author : Ian McEwan, Ashima Arts.
|
||
|
|
Maintainer : ijm
|
||
|
|
Lastmod : 20110822 (ijm)
|
||
|
|
License : Copyright (C) 2011 Ashima Arts. All rights reserved.
|
||
|
|
Distributed under the MIT License. See LICENSE file.
|
||
|
|
https://github.com/ashima/webgl-noise
|
||
|
|
*/
|
||
|
|
/******************************************************************************/
|
||
|
|
|
||
|
|
#ifndef MUDBUN_RANDOM_NOISE
|
||
|
|
#define MUDBUN_RANDOM_NOISE
|
||
|
|
|
||
|
|
#include "NoiseCommon.cginc"
|
||
|
|
|
||
|
|
float mbn_rand(float s)
|
||
|
|
{
|
||
|
|
return frac(sin(mbn_mod(s, 6.2831853)) * 43758.5453123);
|
||
|
|
}
|
||
|
|
|
||
|
|
float mbn_rand(float2 s)
|
||
|
|
{
|
||
|
|
float d = dot(s + 0.1234567, float2(1111112.9819837, 78.237173));
|
||
|
|
float m = mbn_mod(d, 6.2831853);
|
||
|
|
return frac(sin(m) * 43758.5453123);
|
||
|
|
}
|
||
|
|
|
||
|
|
float mbn_rand(float3 s)
|
||
|
|
{
|
||
|
|
float d = dot(s + 0.1234567, float3(11112.9819837, 378.237173, 3971977.9173179));
|
||
|
|
float m = mbn_mod(d, 6.2831853);
|
||
|
|
return frac(sin(m) * 43758.5453123);
|
||
|
|
}
|
||
|
|
|
||
|
|
float mbn_rand_range(float s, float a, float b)
|
||
|
|
{
|
||
|
|
return a + (b - a) * mbn_rand(s);
|
||
|
|
}
|
||
|
|
|
||
|
|
float2 mbn_rand_range(float2 s, float2 a, float2 b)
|
||
|
|
{
|
||
|
|
return a + (b - a) * mbn_rand(s);
|
||
|
|
}
|
||
|
|
|
||
|
|
float3 mbn_rand_range(float3 s, float3 a, float3 b)
|
||
|
|
{
|
||
|
|
return a + (b - a) * mbn_rand(s);
|
||
|
|
}
|
||
|
|
|
||
|
|
float2 mbn_rand_uvec(float2 s)
|
||
|
|
{
|
||
|
|
return normalize(float2(mbn_rand(s), mbn_rand(s * 1.23456789)) - 0.5);
|
||
|
|
}
|
||
|
|
|
||
|
|
float3 mbn_rand_uvec(float3 s)
|
||
|
|
{
|
||
|
|
return normalize(float3(mbn_rand(s), mbn_rand(s * 1.23456789), mbn_rand(s * 9876.54321)) - 0.5);
|
||
|
|
}
|
||
|
|
|
||
|
|
float2 mbn_uvec(float2 s)
|
||
|
|
{
|
||
|
|
return mbn_rand_uvec(s) * mbn_rand(s * 9876.54321);
|
||
|
|
}
|
||
|
|
|
||
|
|
float3 mbn_uvec(float3 s)
|
||
|
|
{
|
||
|
|
return mbn_rand_uvec(s) * mbn_rand(s * 1357975.31313);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|