/*
 * Copyright (C) 2005 guest(r) - guest.r@gmail.com
 * 
 * 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 for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

void main()
{
	float x = 1.0/4096.0;
	float y = 1.0/2048.0;
	vec2 dg1 = vec2( x,y);
	vec2 dg2 = vec2(-x,y);
	gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
	gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
	gl_TexCoord[1].xy = gl_TexCoord[0].xy - dg1;
	gl_TexCoord[2].xy = gl_TexCoord[0].xy - dg2;
	gl_TexCoord[3].xy = gl_TexCoord[0].xy + dg1;
	gl_TexCoord[4].xy = gl_TexCoord[0].xy + dg2;
}