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src/shaders/sdf_core.frag
| 1 | // Copyright (c) 2019 Arjen Hiemstra <ahiemstra@heimr.nl> | 1 | // SPDX-FileCopyrightText: 2019 Arjen Hiemstra <ahiemstra@heimr.nl> | ||
|---|---|---|---|---|---|
| 2 | // SPDX-FileCopyrightText: 2017 Inigo Quilez | ||||
| 3 | // | ||||
| 4 | // SPDX-License-Identifier: MIT | ||||
| 2 | // | 5 | // | ||
| 3 | // This file is based on | 6 | // This file is based on | ||
| 4 | // https://iquilezles.org/www/articles/distfunctions2d/distfunctions2d.htm | 7 | // https://iquilezles.org/www/articles/distfunctions2d/distfunctions2d.htm | ||
| 5 | // | | |||
| 6 | // The MIT License | | |||
| 7 | // Copyright © 2017 Inigo Quilez | | |||
| 8 | // Permission is hereby granted, free of charge, to any person obtaining a copy | | |||
| 9 | // of this software and associated documentation files (the "Software"), to deal | | |||
| 10 | // in the Software without restriction, including without limitation the rights | | |||
| 11 | // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | | |||
| 12 | // copies of the Software, and to permit persons to whom the Software is | | |||
| 13 | // furnished to do so, subject to the following conditions: The above copyright | | |||
| 14 | // notice and this permission notice shall be included in all copies or | | |||
| 15 | // substantial portions of the Software. | | |||
| 16 | // | | |||
| 17 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | | |||
| 18 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | | |||
| 19 | // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | | |||
| 20 | // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | | |||
| 21 | // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | | |||
| 22 | // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | | |||
| 23 | // SOFTWARE. | | |||
| 24 | 8 | | |||
| 25 | //include "desktop_header_core.glsl" | 9 | //include "desktop_header_core.glsl" | ||
| 26 | 10 | | |||
| 27 | // A maximum point count to be used for sdf_polygon input arrays. | 11 | // A maximum point count to be used for sdf_polygon input arrays. | ||
| 28 | // Unfortunately even function inputs require a fixed size at declaration time | 12 | // Unfortunately even function inputs require a fixed size at declaration time | ||
| 29 | // for arrays, unless we were to use OpenGL 4.5. | 13 | // for arrays, unless we were to use OpenGL 4.5. | ||
| 30 | // Since the polygon is most likely to be defined in a uniform, this should be | 14 | // Since the polygon is most likely to be defined in a uniform, this should be | ||
| 31 | // at least less than MAX_FRAGMENT_UNIFORM_COMPONENTS / 2 (since we need vec2). | 15 | // at least less than MAX_FRAGMENT_UNIFORM_COMPONENTS / 2 (since we need vec2). | ||
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