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28 lines
905 B
GLSL
28 lines
905 B
GLSL
#version 120
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//
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// shadow_map.frag
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// fragment shader
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//
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// Created by Andrzej Kapolka on 11/21/13.
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// Copyright 2013 High Fidelity, Inc.
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//
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// Distributed under the Apache License, Version 2.0.
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// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
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//
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uniform sampler2DShadow shadowMap;
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// the inverse of the size of the shadow map
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const float shadowScale = 1.0 / 2048.0;
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// the color in shadow
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varying vec4 shadowColor;
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void main(void) {
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gl_FragColor = mix(shadowColor, gl_Color, 0.25 *
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(shadow2D(shadowMap, gl_TexCoord[0].stp + vec3(-shadowScale, -shadowScale, 0.0)).r +
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shadow2D(shadowMap, gl_TexCoord[0].stp + vec3(-shadowScale, shadowScale, 0.0)).r +
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shadow2D(shadowMap, gl_TexCoord[0].stp + vec3(shadowScale, -shadowScale, 0.0)).r +
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shadow2D(shadowMap, gl_TexCoord[0].stp + vec3(shadowScale, shadowScale, 0.0)).r));
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}
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