29 lines
981 B
GLSL
29 lines
981 B
GLSL
/*
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Copyright (c) 2013 yvt
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This file is part of OpenSpades.
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OpenSpades is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenSpades is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OpenSpades. If not, see <http://www.gnu.org/licenses/>.
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*/
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vec4 FogDensity(float poweredLength) {
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float distance = poweredLength;
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distance = min(distance * (1. / 128. / 128.), 1.);
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float weakenedDensity = 1. - distance;
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weakenedDensity *= weakenedDensity;
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return mix(vec4(distance), vec4(1. - weakenedDensity),
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vec4(0., 0.3, 1.0, 0.0));
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}
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