/*
 *   GRacer
 *
 *   Copyright (C) 1999 Takashi Matsuda <matsu@users.sourceforge.net>
 *
 * This program is free software; you can redistribute it and/or 
 * modify it under the terms of the GNU General Public License as 
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */

#ifndef __GRACER_MATRIX_H__
#define __GRACER_MATRIX_H__

#include "gr_vertex.h"

typedef struct GrMatrix {
  float f[4][4];
} GrMatrix;


#ifdef __cplusplus
extern "C" {
#endif
#if 0
}
#endif


void gr_matrix_mult_vertex	(GrMatrix *m, GrVertex *v, GrVertex *dst);
void gr_matrix_mult_vertex_without_translate (GrMatrix *m,
				 GrVertex *v, GrVertex *dst);
void gr_matrix_copy		(GrMatrix *src, GrMatrix *dst);
void gr_matrix_mult		(GrMatrix *m1, GrMatrix *m2, GrMatrix *dst);
void gr_matrix_rotate		(GrMatrix *m, GrMatrix *dst,
		    		 float s, float c, float x, float y, float z);
void gr_matrix_rotate_x		(GrMatrix *m, GrMatrix *dst, float s, float c);
void gr_matrix_rotate_y		(GrMatrix *m, GrMatrix *dst, float s, float c);
void gr_matrix_rotate_z		(GrMatrix *m, GrMatrix *dst, float s, float c);
void gr_matrix_translate	(GrMatrix *m, GrMatrix *dst, GrVertex *v);
void gr_matrix_scale		(GrMatrix *m, GrMatrix *dst, GrVertex *v);

void gr_matrix_invert		(GrMatrix *m, GrMatrix *dst);

extern GrMatrix *gr_matrix_identity;

#ifdef __cplusplus
}
#endif

#endif /* __GRACER_MATRIX_H__ */