71 lines
2.1 KiB
GLSL
71 lines
2.1 KiB
GLSL
/**
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* @file WLCloudsV.glsl
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*
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* $LicenseInfo:firstyear=2005&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2005, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*/
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uniform mat4 modelview_projection_matrix;
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uniform mat4 modelview_matrix;
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ATTRIBUTE vec3 position;
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ATTRIBUTE vec2 texcoord0;
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//////////////////////////////////////////////////////////////////////////
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// The vertex shader for creating the atmospheric sky
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///////////////////////////////////////////////////////////////////////////////
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// Output parameters
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VARYING vec2 vary_texcoord0;
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VARYING vec2 vary_texcoord1;
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VARYING vec2 vary_texcoord2;
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VARYING vec2 vary_texcoord3;
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VARYING vec3 vary_pos;
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// Inputs
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uniform float cloud_scale;
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uniform vec4 lightnorm;
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uniform vec3 camPosLocal;
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void main()
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{
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vary_pos = position;
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// World / view / projection
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gl_Position = modelview_projection_matrix * vec4(position.xyz, 1.0);
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// Texture coords
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vary_texcoord0 = texcoord0;
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vary_texcoord0.xy -= 0.5;
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vary_texcoord0.xy /= max(0.001, cloud_scale);
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vary_texcoord0.xy += 0.5;
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vary_texcoord1 = vary_texcoord0;
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vary_texcoord1.x += lightnorm.x * 0.0125;
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vary_texcoord1.y += lightnorm.z * 0.0125;
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vary_texcoord2 = vary_texcoord0 * 16.;
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vary_texcoord3 = vary_texcoord1 * 16.;
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// END CLOUDS
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}
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