mutter/cogl/cogl-quaternion-private.h

/*
 * Cogl
 *
 * An object oriented GL/GLES Abstraction/Utility Layer
 *
 * Copyright (C) 2008,2009 Intel Corporation.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Authors:
 *   Robert Bragg <robert@linux.intel.com>
 */

#ifndef __COGL_QUATERNION_PRIVATE_H__
#define __COGL_QUATERNION_PRIVATE_H__

#include <glib.h>

/* squared length */
#define _COGL_QUATERNION_NORM(Q) \
  ((Q)->x*(Q)->x + (Q)->y*(Q)->y + (Q)->z*(Q)->z + (Q)->w*(Q)->w)

#define _COGL_QUATERNION_DEGREES_TO_RADIANS (G_PI / 180.0f)
#define _COGL_QUATERNION_RADIANS_TO_DEGREES (180.0f / G_PI)

#endif /* __COGL_QUATERNION_PRIVATE_H__ */
math: Adds an experimental quaternion API This adds an experimental quaternion utility API. It's not yet fully documented but it's complete enough that people can start to experiment with using it. It adds the following functions: cogl_quaternion_init_identity cogl_quaternion_init cogl_quaternion_init_from_angle_vector cogl_quaternion_init_from_array cogl_quaternion_init_from_x_rotation cogl_quaternion_init_from_y_rotation cogl_quaternion_init_from_z_rotation cogl_quaternion_equal cogl_quaternion_copy cogl_quaternion_free cogl_quaternion_get_rotation_angle cogl_quaternion_get_rotation_axis cogl_quaternion_normalize cogl_quaternion_dot_product cogl_quaternion_invert cogl_quaternion_multiply cogl_quaternion_pow cogl_quaternion_slerp cogl_quaternion_nlerp cogl_quaternion_squad cogl_get_static_identity_quaternion cogl_get_static_zero_quaternion Since it's experimental API you'll need to define COGL_ENABLE_EXPERIMENTAL_API before including cogl.h. 2010-02-24 20:40:29 -05:00			`/*`
			`* Cogl`
			`*`
			`* An object oriented GL/GLES Abstraction/Utility Layer`
			`*`
			`* Copyright (C) 2008,2009 Intel Corporation.`
			`*`
			`* This library is free software; you can redistribute it and/or`
			`* modify it under the terms of the GNU Lesser General Public`
			`* License as published by the Free Software Foundation; either`
			`* version 2 of the License, or (at your option) any later version.`
			`*`
			`* This library is distributed in the hope that it will be useful,`
			`* but WITHOUT ANY WARRANTY; without even the implied warranty of`
			`* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU`
			`* Lesser General Public License for more details.`
			`*`
			`* You should have received a copy of the GNU Lesser General Public`
			`* License along with this library; if not, write to the`
			`* Free Software Foundation, Inc., 59 Temple Place - Suite 330,`
			`* Boston, MA 02111-1307, USA.`
			`*`
			`* Authors:`
			`* Robert Bragg <robert@linux.intel.com>`
			`*/`

			`#ifndef __COGL_QUATERNION_PRIVATE_H__`
			`#define __COGL_QUATERNION_PRIVATE_H__`

			`#include <glib.h>`

			`/* squared length */`
			`#define _COGL_QUATERNION_NORM(Q) \`
			`((Q)->x(Q)->x + (Q)->y(Q)->y + (Q)->z(Q)->z + (Q)->w(Q)->w)`

			`#define _COGL_QUATERNION_DEGREES_TO_RADIANS (G_PI / 180.0f)`
			`#define _COGL_QUATERNION_RADIANS_TO_DEGREES (180.0f / G_PI)`

			`#endif /* __COGL_QUATERNION_PRIVATE_H__ */`