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/* $Id$ */
/*
libg3d - 3D object loading library
Copyright (C) 2005-2009 Markus Dahms <mad@automagically.de>
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 2.1 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _G3D_MATRIX_H
#define _G3D_MATRIX_H
#include <g3d/types.h>
#ifdef __cplusplus
extern "C" {
#endif /* ifdef __cplusplus */
/**
* SECTION:matrix
* @short_description: Matrix manipulation and calculation
* @include: g3d/matrix.h
*
* Matrices in libg3d have the following layout:
*
* G3DMatrix matrix[16]:
*
* matrix[col * 4 + row] = f;
*/
/**
* g3d_matrix_identity:
* @matrix: 4x4 matrix (float[16])
*
* Sets the given matrix to the identity matrix.
*
* Returns: TRUE on success, FALSE else
*/
EAPI
gboolean g3d_matrix_identity(G3DMatrix *matrix);
/**
* g3d_matrix_new:
*
* Create a new matrix. It is also set to the identity matrix.
*
* Returns: the new matrix
*/
_G3D_STATIC_INLINE G3DMatrix *g3d_matrix_new(void) {
G3DMatrix *matrix = g_new(G3DMatrix, 16);
g3d_matrix_identity(matrix);
return matrix;
}
/**
* g3d_matrix_free:
* @matrix: the matrix to free
*
* Free the memory allocated by a matrix.
*/
_G3D_STATIC_INLINE void g3d_matrix_free(G3DMatrix *matrix) {
g_free(matrix);
}
/**
* g3d_matrix_multiply:
* @m1: first matrix
* @m2: second matrix
* @rm: resulting matrix
*
* Multiplies the matrixes.
*
* Returns: TRUE on success, FALSE else
*/
EAPI
gboolean g3d_matrix_multiply(G3DMatrix *m1, G3DMatrix *m2, G3DMatrix *rm);
/**
* g3d_matrix_translate:
* @x: x translation
* @y: y translation
* @z: z translation
* @rm: resulting matrix
*
* Adds a translation to the the matrix.
*
* Returns: TRUE on success, FALSE else
*/
EAPI
gboolean g3d_matrix_translate(G3DFloat x, G3DFloat y, G3DFloat z,
G3DMatrix *rm);
/**
* g3d_matrix_rotate:
* @angle: rotation angle
* @ax: x component of rotation axis
* @ay: y component of rotation axis
* @az: z component of rotation axis
* @rm: resulting matrix
*
* Adds a rotation to the matrix.
*
* Returns: TRUE on success, FALSE else
*/
EAPI
gboolean g3d_matrix_rotate(G3DFloat angle, G3DFloat ax, G3DFloat ay,
G3DFloat az, G3DMatrix *rm);
/**
* g3d_matrix_rotate_xyz
* @rx: rotation around x axis
* @ry: rotation around y axis
* @rz: rotation around z axis
* @rm: resulting matrix
*
* Adds a rotation around the 3 coordinate system axes to the matrix.
*
* Returns: TRUE on success, FALSE else
*/
EAPI
gboolean g3d_matrix_rotate_xyz(G3DFloat rx, G3DFloat ry, G3DFloat rz,
G3DMatrix *rm);
/**
* g3d_matrix_scale:
* @x: x factor
* @y: y factor
* @z: z factor
* @rm: resulting matrix
*
* Adds a scaling to the matrix.
*
* Returns: TRUE on success, FALSE else
*/
EAPI
gboolean g3d_matrix_scale(G3DFloat x, G3DFloat y, G3DFloat z, G3DMatrix *rm);
/**
* g3d_matrix_transpose:
* @matrix: the matrix
*
* Transposes the matrix.
*
* Returns: TRUE on success, FALSE else
*/
EAPI
gboolean g3d_matrix_transpose(G3DMatrix *matrix);
/**
* g3d_matrix_determinant:
* @matrix: the matrix
*
* Calculate the determinant of the matrix (FIXME: not verified).
*
* Returns: the determinant.
*/
EAPI
G3DFloat g3d_matrix_determinant(G3DMatrix *matrix);
/**
* g3d_matrix_dump:
* @matrix: the matrix
*
* If debugging is enabled, this function dump the matrix to stderr.
*
* Returns: TRUE if matrix is dumped, FALSE else
*/
EAPI
gboolean g3d_matrix_dump(G3DMatrix *matrix);
#ifdef __cplusplus
}
#endif /* ifdef __cplusplus */
#endif /* _G3D_MATRIX_H */
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