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52 lines
2.2 KiB
GLSL
52 lines
2.2 KiB
GLSL
/****************************************************************************
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* MeshLab o o *
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* An extendible mesh processor o o *
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* _ O _ *
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* Copyright(C) 2005, 2009 \/)\/ *
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* Visual Computing Lab /\/| *
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* ISTI - Italian National Research Council | *
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* \ *
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* All rights reserved. *
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* *
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* This program 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 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program 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 (http://www.gnu.org/licenses/gpl.txt) *
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* for more details. *
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* *
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****************************************************************************/
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//
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// Minnaert reflection model (per-pixel)
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//
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// by
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// Massimiliano Corsini
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// Visual Computing Lab (2006)
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//
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varying vec3 normal;
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varying vec3 vpos;
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uniform float m;
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void main (void)
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{
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vec3 N = normalize(normal);
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vec3 V = normalize(-vpos);
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vec3 L = normalize(gl_LightSource[0].position.xyz - vpos);
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// diffuse color
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vec4 kd = gl_LightSource[0].diffuse * gl_FrontMaterial.diffuse;
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// Minnaert reflection model
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float NdotV = dot(N,V);
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float NdotL = dot(N,L);
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gl_FragColor = pow(max(NdotV * NdotL, 0.0), m) * kd;
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}
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