42 lines
1019 B
GLSL
42 lines
1019 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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uniform sampler2DShadow depthTexture;
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varying vec3 scanPos;
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varying vec2 circlePos;
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uniform float radius;
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void main() {
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float val = shadow2D(depthTexture, scanPos).x;
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// circle trim
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float rad = length(circlePos);
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rad *= radius;
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rad = max(radius - 1. - rad, 0.);
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val *= rad;
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gl_FragColor = vec4(vec3(val), 1.);
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}
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