58 lines
2.0 KiB
Plaintext
58 lines
2.0 KiB
Plaintext
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/*
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--------------------------------------------------------------------------------
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This source file is part of SkyX.
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Visit http://www.paradise-studios.net/products/skyx/
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Copyright (C) 2009-2012 Xavier Vergu<67>n Gonz<6E>lez <xavyiy@gmail.com>
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place - Suite 330, Boston, MA 02111-1307, USA, or go to
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http://www.gnu.org/copyleft/lesser.txt.
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--------------------------------------------------------------------------------
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*/
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// ------------------------- SkyX volumetric clouds -----------------------------
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// ------------------------------ GLSL Vertex -----------------------------------
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// IN
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attribute vec4 vertex; // iPosition
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attribute vec3 uv0; // i3DCoord
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attribute vec2 uv1; // iNoiseUV
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attribute float uv2; // iOpacity
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// OUT
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varying vec3 v3DCoord;
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varying vec2 vNoiseUV;
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varying float vOpacity;
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varying vec3 vEyePixel;
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varying float vDistance;
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// UNIFORM
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uniform vec3 uCameraPosition;
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uniform float uRadius;
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void main(void)
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{
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// Clip space position
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gl_Position = gl_ModelViewProjectionMatrix * vertex;
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// 3D coords
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v3DCoord = uv0;
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// Noise coords
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vNoiseUV = uv1;
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// Opacity
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vOpacity = uv2;
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// Eye to pixel vector
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vEyePixel = normalize(vertex.xyz - uCameraPosition);
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// Distance in [0,1] range
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vDistance = length(vec2(vertex.x, vertex.z)) / uRadius;
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}
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