40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
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/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2008,2009 Intel Corporation.
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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; either
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* version 2 of the License, or (at your option) any later version.
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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
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Authors:
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* Robert Bragg <robert@linux.intel.com>
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*/
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#ifndef __COGL_QUATERNION_PRIVATE_H__
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#define __COGL_QUATERNION_PRIVATE_H__
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#include <glib.h>
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/* squared length */
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#define _COGL_QUATERNION_NORM(Q) \
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((Q)->x*(Q)->x + (Q)->y*(Q)->y + (Q)->z*(Q)->z + (Q)->w*(Q)->w)
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#define _COGL_QUATERNION_DEGREES_TO_RADIANS (G_PI / 180.0f)
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#define _COGL_QUATERNION_RADIANS_TO_DEGREES (180.0f / G_PI)
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#endif /* __COGL_QUATERNION_PRIVATE_H__ */
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