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/**
* @file WLCloudsV.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
* $/LicenseInfo$
*/
uniform mat4 modelview_projection_matrix;
uniform mat4 modelview_matrix;
ATTRIBUTE vec3 position;
ATTRIBUTE vec2 texcoord0;
//////////////////////////////////////////////////////////////////////////
// The vertex shader for creating the atmospheric sky
///////////////////////////////////////////////////////////////////////////////
// Output parameters
VARYING vec2 vary_texcoord0;
VARYING vec2 vary_texcoord1;
VARYING vec2 vary_texcoord2;
VARYING vec2 vary_texcoord3;
VARYING vec3 vary_pos;
// Inputs
uniform float cloud_scale;
uniform vec4 lightnorm;
uniform vec3 camPosLocal;
void main()
{
vary_pos = position;
// World / view / projection
gl_Position = modelview_projection_matrix * vec4(position.xyz, 1.0);
// Texture coords
vary_texcoord0 = texcoord0;
vary_texcoord0.xy -= 0.5;
vary_texcoord0.xy /= max(0.001, cloud_scale);
vary_texcoord0.xy += 0.5;
vary_texcoord1 = vary_texcoord0;
vary_texcoord1.x += lightnorm.x * 0.0125;
vary_texcoord1.y += lightnorm.z * 0.0125;
vary_texcoord2 = vary_texcoord0 * 16.;
vary_texcoord3 = vary_texcoord1 * 16.;
// END CLOUDS
}
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