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30 lines
923 B
GLSL
30 lines
923 B
GLSL
#version 120
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//
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// metavoxel_heightfield_splat.frag
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// fragment shader
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//
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// Created by Andrzej Kapolka on 8/20/14.
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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 number of splats per pass
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const int SPLAT_COUNT = 4;
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// the splat textures
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uniform sampler2D diffuseMaps[SPLAT_COUNT];
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// alpha values for the four splat textures
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varying vec4 alphaValues;
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void main(void) {
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// blend the splat textures
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gl_FragColor = vec4(gl_Color.rgb, step(1.0, gl_Color.a + 1.0 / 512.0)) *
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(texture2D(diffuseMaps[0], gl_TexCoord[0].st) * alphaValues.x +
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texture2D(diffuseMaps[1], gl_TexCoord[1].st) * alphaValues.y +
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texture2D(diffuseMaps[2], gl_TexCoord[2].st) * alphaValues.z +
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texture2D(diffuseMaps[3], gl_TexCoord[3].st) * alphaValues.w);
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}
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