/*
** File  : sprite.h
** Author: D Smethurst
** Desc. : prototypes for the functions in the source files
** Version: 0.1
**/
#ifndef __SPRITE_H__
#define __SPRITE_H__
/*
** Alter this if you want each sprite to have
** more frames.
*/
#define MAX_FRAMES	10

/*
** Forward reference 
*/
struct Sprite;

/*
** Currently unused in this version
*/
typedef VPSP (void (void * s));

/*
** Use my own boolean type
*/
typedef short BOOL;

#define u_long unsigned long

#define FALSE	0
#define TRUE	1

/*
** Error defines - assume this will grow !
*/
#define NO_ERROR	    -1
#define SPR_TOO_MANY_FRAMES  0
#define SPR_NO_MEM           1

extern int mystrerror;
extern char *errors[];

/*
** My own sprite structure.
*/
typedef struct Sprite
{
   short x,y;      /* sprite position */
   short w,h;      /* sprite w/h */
   short dx, dy;   /* Movement in direction x & y - added for v0.2*/

   GsSPRITE spr;   /* Actual psx sprite */

   u_long curframe;           /* Current frame to display */
   u_long frames[MAX_FRAMES]; /* List of frames */

   int n;          /* Number of frames to this sprite */

   short uTicks;   /* Number of ticks between updates */
   VPSP  *update;  /* Update function for this sprite - unused atm */

} Sprite, * lpSprite;

/*
** Spritelist structure
*/
typedef struct spritelist
{
   lpSprite s;   /* Sprite in this entry */
   short tick;   /* tick the list entry is on */

   struct spritelist *next;   /* Next entry */
   struct spritelist *prev;   /* Last entry */

} spritelist, * lpspritelist;

/* Implemented */

/* Sprite.c */
lpSprite SprCreate( u_long addr );
lpSprite SprCreateN( u_long *addrs, int n );
BOOL SprChangeFrame( lpSprite s, int n );
void SprAttachCallBack( lpSprite spr, VPSP cback, short nTicks );

/** Internal call to sprite.c **/
/* Don't use - Dave */
void InitSprite( lpSprite s );

/* SprLst.c */
BOOL SprLstRemove( lpSprite s, lpspritelist l );
lpspritelist SprLstAdd( lpSprite s, lpspritelist l );
lpSprite SprLstCollision( lpSprite s, lpspritelist l );
void SprLstDraw( lpspritelist l, GsOT dtoOT );
void SprLstUpdate( lpspritelist l );
void SpritePrintError( void );

#endif   /* __SPRITE_H__ */