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34 lines
873 B
GLSL
34 lines
873 B
GLSL
#version 120
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//
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// ambient_occlusion.frag
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// fragment shader
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//
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// Created by Andrzej Kapolka on 7/5/13.
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// Copyright (c) 2013 High Fidelity, Inc. All rights reserved.
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//
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// the depth texture
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uniform sampler2D depth;
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// the distance to the near clip plane
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uniform float near;
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// the distance to the far clip plane
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uniform float far;
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// the left and bottom edges of the view window
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uniform vec2 leftBottom;
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// the right and top edges of the view window
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uniform vec2 rightTop;
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// given a texture coordinate, returns the 3D view space coordinate
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vec3 texCoordToViewSpace(vec2 texCoord) {
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float z = (far * near) / (texture2D(depth, texCoord).r * (far - near) - far);
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return vec3(((texCoord * 2.0 - vec2(1.0, 1.0)) * (rightTop - leftBottom) + rightTop + leftBottom) * z / (-2.0 * near), z);
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}
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void main(void) {
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gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0);
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}
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