POINT	point_BOX[]={

	POStoFIXED( -16.00, 16.00, -16.00),

	POStoFIXED( -16.00, 16.00, 16.00),

	POStoFIXED( 16.00, 16.00, 16.00),

	POStoFIXED( 16.00, 16.00, -16.00),

	POStoFIXED( -16.00, -16.00, 16.00),

	POStoFIXED( 16.00, -16.00, 16.00),

	POStoFIXED( -16.00, -16.00, -16.00),

	POStoFIXED( 16.00, -16.00, -16.00),

};

POLYGON polygon_BOX[]={

	NORMAL(  0,  50,  0), VERTICES( 0, 1, 2, 3),

	NORMAL(  0,  0,  50), VERTICES( 1, 4, 5, 2),

	NORMAL(  0, -50,  0), VERTICES( 4, 6, 7, 5),

	NORMAL(  0,  0, -50), VERTICES( 6, 0, 3, 7),

	NORMAL(  50,  0,  0), VERTICES( 3, 2, 5, 7),

	NORMAL( -50,  0,  0), VERTICES( 1, 0, 6, 4),

};

ATTR attribute_BOX[]={

	ATTRIBUTE(Single_Plane,SORT_CEN,No_Texture,C_RGB(31, 0, 8),No_Gouraud,MESHoff,sprPolygon,UseClip),

	ATTRIBUTE(Single_Plane,SORT_CEN,No_Texture,C_RGB(31,23, 0),No_Gouraud,MESHoff,sprPolygon,UseClip),

	ATTRIBUTE(Single_Plane,SORT_CEN,No_Texture,C_RGB(31, 0, 0),No_Gouraud,MESHoff,sprPolygon,UseClip),

	ATTRIBUTE(Single_Plane,SORT_CEN,No_Texture,C_RGB(31,23, 0),No_Gouraud,MESHoff,sprPolygon,UseClip),

	ATTRIBUTE(Single_Plane,SORT_CEN,No_Texture,C_RGB(10,10,31),No_Gouraud,MESHoff,sprPolygon,UseClip),

	ATTRIBUTE(Single_Plane,SORT_CEN,No_Texture,C_RGB(10,10,31),No_Gouraud,MESHoff,sprPolygon,UseClip),

};

PDATA PD_BOX = {

	point_BOX,sizeof(point_BOX)/sizeof(POINT),

	polygon_BOX,sizeof(polygon_BOX)/sizeof(POLYGON),

	attribute_BOX

};

 
 
typedef enum {

  IS_EMPTY,

  IS_PDATA,

  IS_XPDATA,

} PdataType;

typedef struct POLYGON_DATA {

  PdataType type;

  XPDATA data;

} PolygonData;

typedef struct TILE_DATA {

  unsigned short nObj;

  PolygonData *obj;

} TileData;

typedef struct POLYGON_MAP {

  // mapSize in tiles

  struct {

    unsigned short x;

    unsigned short y;

  } mapSize;

  // tileSize in world coordinates

  struct {

    FIXED x;

    FIXED y;

  } tileSize, mapOrigin;

  TileData *tiles;

} MapData;

 
 
// what kind of distance is this,

// since it's sx	=(a_collison[aa].cen_x+x)>>16;

// and not sx	=(a_collison[aa].cen_x-x)>>16;

li	=slSquart(sx*sx+sy*sy+sz*sz);

// is this the distance to a plane?

// perpendicular to the plane or to the ground?

col_hight =-(A*((-x-poa)>>16)+B*((-y-pob)>>16))/C-(poc>>16);

// why this fixed point format conversion?

col_x	=A*3;