/usr/share/meshlab/shaders/SEM.frag is in meshlab 1.3.2+dfsg1-2build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* MeshLab o o *
* An extendible mesh processor o o *
* _ O _ *
* Copyright(C) 2005, 2009 \/)\/ *
* Visual Computing Lab /\/| *
* ISTI - Italian National Research Council | *
* \ *
* All rights reserved. *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License (http://www.gnu.org/licenses/gpl.txt) *
* for more details. *
* *
****************************************************************************/
// vertex to fragment shader io
varying vec3 N;
varying vec3 I;
varying vec4 Cs;
varying vec3 LightDir;
// globals
uniform float edgefalloff;
// entry point
void main()
{
float opac = dot(normalize(N), normalize(-LightDir));
//float opac = dot(normalize(N), normalize(-I));
opac = abs(opac);
opac = 1.0-pow(opac, edgefalloff);
//opac = 1.0 - opac;
gl_FragColor = opac * Cs;
// gl_FragColor.a = opac;
}
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