45 lines
1.4 KiB
GLSL
45 lines
1.4 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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// Creates a bubble (wave) effect by distorting the texture depending on time
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uniform mat4 ModelViewProjectionMatrix;
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uniform float time;
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#if __VERSION__ >= 130
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in vec3 Position;
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in vec2 Texcoord;
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out vec2 uv;
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#else
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attribute vec3 Position;
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attribute vec2 Texcoord;
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varying vec2 uv;
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#endif
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void main()
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{
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gl_Position = ModelViewProjectionMatrix * vec4(Position, 1.);
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float delta_x = cos(time*3.0) * sin( 4.0 * Texcoord.x * 6.28318531 );
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float delta_y = cos(time*2.0) * sin( 3.0 * Texcoord.y * 6.28318531 );
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uv = Texcoord + vec2(0.02*delta_x, 0.02*delta_y);
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}
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