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32 lines
1.1 KiB
GLSL
32 lines
1.1 KiB
GLSL
#version 120
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//
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// shadow_map.vert
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// vertex shader
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//
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// Created by Andrzej Kapolka on 3/27/14.
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// Copyright 2014 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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// the color in shadow
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varying vec4 shadowColor;
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void main(void) {
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// the shadow color includes only the ambient terms
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shadowColor = gl_Color * (gl_LightModel.ambient + gl_LightSource[0].ambient);
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// the normal color includes diffuse
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vec4 normal = normalize(gl_ModelViewMatrix * vec4(gl_Normal, 0.0));
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gl_FrontColor = shadowColor + gl_Color * (gl_LightSource[0].diffuse * max(0.0, dot(normal, gl_LightSource[0].position)));
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// generate the shadow texture coordinates using the eye position
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vec4 eyePosition = gl_ModelViewMatrix * gl_Vertex;
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gl_TexCoord[0] = vec4(dot(gl_EyePlaneS[0], eyePosition), dot(gl_EyePlaneT[0], eyePosition),
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dot(gl_EyePlaneR[0], eyePosition), 1.0);
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// use the fixed function transform
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gl_Position = ftransform();
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}
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