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Diffstat (limited to 'atrix256.cginc')
| -rw-r--r-- | atrix256.cginc | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/atrix256.cginc b/atrix256.cginc new file mode 100644 index 0000000..5236715 --- /dev/null +++ b/atrix256.cginc @@ -0,0 +1,37 @@ +#ifndef __ATRIX256_INC +#define __ATRIX256_INC +/* +MIT License + +Copyright (c) 2021 Alan Wolfe + +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. +*/ + +// Interleaved gradient noise. +// ported from this repo: https://github.com/Atrix256/IGNLDS +// blog post: https://blog.demofox.org/2017/10/31/animating-noise-for-integration-over-time +float ign(float2 screen_px) { + return fmod(52.9829189 * + fmod(0.06711056 * screen_px.x + + 0.00583715 * screen_px.y, 1), 1); +} + +#endif // __ATRIX256_INC + |