32 lines
1.2 KiB
GLSL
32 lines
1.2 KiB
GLSL
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/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2008 Martin Gräßlin <ubuntu@martin-graesslin.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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attribute float angle;
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attribute float x;
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attribute float y;
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void main()
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{
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float radian = radians(angle);
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mat2 rotation = mat2( cos(radian), sin(radian), -sin(radian), cos(radian) );
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vec2 vertex = (gl_Vertex.xy-vec2(x, y))*rotation+vec2(x, y);
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gl_TexCoord[0] = gl_MultiTexCoord0;
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gl_Position = gl_ModelViewProjectionMatrix * vec4(vertex, gl_Vertex.zw);
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}
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