49 lines
1.9 KiB
JavaScript
49 lines
1.9 KiB
JavaScript
/*
|
|
* This file is part of BlueMap, licensed under the MIT License (MIT).
|
|
*
|
|
* Copyright (c) Blue (Lukas Rieger) <https://bluecolored.de>
|
|
* Copyright (c) contributors
|
|
*
|
|
* 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.
|
|
*/
|
|
export const SKY_FRAGMENT_SHADER = `
|
|
uniform float sunlightStrength;
|
|
uniform float ambientLight;
|
|
uniform vec3 skyColor;
|
|
uniform vec3 voidColor;
|
|
|
|
varying vec3 vPosition;
|
|
|
|
vec3 adjustColor(vec3 color) {
|
|
return vec3(color * max(sunlightStrength * sunlightStrength, ambientLight));
|
|
}
|
|
|
|
void main() {
|
|
float horizonWidth = 0.005;
|
|
float horizonHeight = 0.0;
|
|
|
|
vec3 adjustedSkyColor = adjustColor(skyColor);
|
|
vec3 adjustedVoidColor = adjustColor(voidColor);
|
|
float voidMultiplier = (clamp(vPosition.y - horizonHeight, -horizonWidth, horizonWidth) + horizonWidth) / (horizonWidth * 2.0);
|
|
vec3 color = mix(adjustedVoidColor, adjustedSkyColor, voidMultiplier);
|
|
|
|
gl_FragColor = vec4(color, 1.0);
|
|
}
|
|
`;
|