/** 
 * @file gatherSkyShV.glsl
 *
 * $LicenseInfo:firstyear=2005&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2005, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */
 
ATTRIBUTE vec3 position;
ATTRIBUTE vec2 texcoord0;

VARYING vec2 vary_frag;
uniform vec2 screen_res;

void main()
{
    // pass through untransformed fullscreen pos
    float oo_divisor = screen_res.x / 64.0;
    vec3 pos = (position.xyz * oo_divisor) + vec3(oo_divisor - 1, oo_divisor - 1, 0);
	gl_Position = vec4(pos.xyz, 1.0);
    vary_frag = texcoord0 * oo_divisor;
}