bc0724935e
git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@14395 178a84e3-b1eb-0310-8ba1-8eac791a3b58
55 lines
1.6 KiB
GLSL
55 lines
1.6 KiB
GLSL
// SuperTuxKart - a fun racing game with go-kart
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// Copyright (C) 2013 the SuperTuxKart team
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 3
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// of the License, or (at your option) any later version.
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//
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// This program 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
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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uniform vec4 fogColor;
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uniform float fogFrom;
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uniform float fogTo;
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uniform int fog;
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uniform sampler2D tex;
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varying vec4 coord;
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void main()
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{
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vec4 color = texture2D(tex, gl_TexCoord[0].st);
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vec4 solidColor = vec4(color.r, color.g, color.b, 1);
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if (fog == 1)
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{
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if (coord.z > fogTo)
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{
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gl_FragColor = fogColor;
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gl_FragColor.a = color.a;
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}
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else if (coord.z > fogFrom)
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{
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float fogIntensity = (coord.z - fogFrom) / (fogTo - fogFrom);
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vec4 color2 = fogIntensity*fogColor + (1.0 - fogIntensity)*solidColor;
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color2.a = color.a;
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gl_FragColor = color2;
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}
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else
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{
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gl_FragColor = color;
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}
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}
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else
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{
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gl_FragColor = color;
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}
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}
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