/* Header file for ACK3D engine routines */
/* Author: Lary Myers */

#define USE_XMS		1	    /* Set to 0 if XMS not desired */

#define FP_SHIFT	16
#define FP_MULT		65536
#define FP_HALF		32768

#define VIEW_WIDTH	320
#define MAX_DISTANCE	2048

#define TYPE_WALL	0
#define TYPE_OBJECT	1
#define TYPE_PALETTE	2

#define BITMAP_WIDTH	64
#define BITMAP_HEIGHT	64
#define BITMAP_SIZE	(BITMAP_WIDTH * BITMAP_HEIGHT)

#define GRID_SIZE	64
#define GRID_WIDTH	64
#define GRID_HEIGHT	64
#define GRID_MAX	GRID_WIDTH * GRID_HEIGHT
#define GRID_XMAX	GRID_WIDTH * GRID_SIZE
#define GRID_YMAX	GRID_HEIGHT * GRID_SIZE

#define GRID_XMAXLONG	(GRID_XMAX * FP_MULT)
#define GRID_YMAXLONG	(GRID_YMAX * FP_MULT)

#define MAX_HEIGHT	960
#define MIN_HEIGHT	16


#define MAX_UPDOWN	    30	    /* Max up or down spots for each level */

#define MAP_STARTCODE	    0xFC    /* Force player to this square  */
#define MAP_UPCODE	    0xFD    /* Go up to previous level	    */
#define MAP_DOWNCODE	    0xFE    /* Go down to next level	    */
#define MAP_GOALCODE	    0xFF    /* Finish line!		    */


#define MAX_XARRAY	    10	    /* Max number in XMS array	    */

typedef struct {
    UCHAR   far	    *Bmp;	    /* Pointer to real memory */
    unsigned long   xHandle;	    /* Handle to XMS memory   */
	    int	    count;	    /* Usage count	      */
} XARRAY;

typedef struct {
	int	    Number;	/* Bitmap number of this wall  */
	int	    Column;	/* Column of bitmap to display */
	int	    Distance;	/* Distance to this column     */
	int	    LightAdj;	/* Not currently used	       */
    } WALLARRAY;


typedef struct {
	    int	    mPos;	/* Map Position */
	    UINT    mCode;	/* Special code (start,up,down,goal) */
} SPECIALCODE;


#define BYTES_PER_ROW	320
#define DWORDS_PER_ROW	(BYTES_PER_ROW / 4)
#define SCREEN_SIZE	64000