/*
 *   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_AC3D_H__
#define __GRACER_AC3D_H__

#include <stdio.h>
#include "gr_global.h"

/*
 * gracer and ac3d coordinate translation.
 * gracer <-> ac3d
 *      x <-> -z
 *      y <-> -x
 *      z <->  y
 */

typedef enum {
  AC3D_OBJ_WORLD,
  AC3D_OBJ_POLY,
  AC3D_OBJ_GROUP,
} Ac3dObjectType;

typedef enum {
  AC3D_OPT_TEXREP	= 1<<0,
  AC3D_OPT_ROT		= 1<<1,
  AC3D_OPT_LOC		= 1<<2,
} Ac3dOptionType;

typedef enum {
  AC3D_SURF_POLYGON	= 0,
  AC3D_SURF_CLOSEDLINE	= 1,
  AC3D_SURF_LINE	= 2,
  AC3D_SURF_SHADED	= 1<<4,
  AC3D_SURF_TWOSIDE	= 1<<5,

  AC3D_SURF_TYPE_MASK	= 7,
} Ac3dSurfaceType;

typedef struct {
  char *name;
  float rgb[3];
  float amb[3];
  float ems[3];
  float spc[3];
  int shi;
  float trans;
} Ac3dMaterial;

typedef struct {
  int ref;
  float s, t;
} Ac3dRef;

typedef struct {
  Ac3dSurfaceType type;
  int mat;
  int num_refs;
  Ac3dRef *refs;
} Ac3dSurface;

typedef struct Ac3dObject {
  Ac3dObjectType type;

  unsigned long options;
  char *name;		/* optional */
  int data_size;
  unsigned char *data;
  char *tex_name;
  float texrep[2];
  float rot[3][3];
  float loc[3];
  char *url;

  int num_verts;
  float *verts;

  int num_surfs;
  Ac3dSurface **surfs;

  int num_kids;
  struct Ac3dObject **kids;

} Ac3dObject;


typedef struct {
  int num_mats;
  Ac3dMaterial **mats;

  int num_objs;
  Ac3dObject **objs;

} Ac3dScene;


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

Ac3dScene*	ac3d_scene_new_from_file	(FILE *file);
Ac3dScene*	ac3d_scene_new_from_data	(char *data);
void		ac3d_scene_free			(Ac3dScene *scene);

void		ac3d_scene_write		(FILE *file,
						 Ac3dScene *scene);

Ac3dObject*	ac3d_scene_find_object		(Ac3dScene *scene,
						 char *name,
						 Ac3dObject *from);

void		ac3d_object_absolute_coord	(Ac3dObject *object,
						 float *origin);

void		ac3d_object_scale		(Ac3dObject *object,
						 float *scale);

void		ac3d_object_convert_coord	(Ac3dObject *object);



#ifdef __cplusplus
}
#endif /* __cplusplus */


#endif /* __GRACER_AC3D_H__ */