43 lines
1.7 KiB
JavaScript
43 lines
1.7 KiB
JavaScript
/*
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* This file is part of BlueMap, licensed under the MIT License (MIT).
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*
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* Copyright (c) Blue (Lukas Rieger) <https://bluecolored.de>
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* Copyright (c) contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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export const SKY_FRAGMENT_SHADER = `
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uniform float sunlightStrength;
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uniform float ambientLight;
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uniform vec3 skyColor;
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varying vec3 vPosition;
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void main() {
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float horizonWidth = 0.005;
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float horizonHeight = 0.0;
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vec4 color = vec4(skyColor * max(sunlightStrength, ambientLight), 1.0);
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float voidMultiplier = (clamp(vPosition.y - horizonHeight, -horizonWidth, horizonWidth) + horizonWidth) / (horizonWidth * 2.0);
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color.rgb *= voidMultiplier;
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gl_FragColor = color;
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}
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`;
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