//*	main.h - header for main.c (Blitter Boy game)

//* Sprite array (sprt[]) static assignments
enum {
	SPRT_BLITBOY,
	SPRT_TVBEAM,
	SPRT_BABY1,
	SPRT_BABY2,
	SPRT_BABY3,
	SPRT_BABY4,
	SPRT_BABY5,
	SPRT_BABY6,
	SPRT_POOL_START
};

#define TV_MODE				(MODE_PAL)
#define FRAMES_PER_SEC		(50)

#define UFO_HOVER_HEIGHT	(16)		//* .high value UFO's hover at

//* Values for 'lifeCount' member of SCTRL struct
#define PICKUP_FRAME_LIFE	(480)		//* 8 seconds (NTSC)
#define COIN_FRAME_LIFE		(360)		//* 6 seconds (NTSC)

//* Basic setup
#define OT_LENGTH		(8)		//* Ordering table size (1-14): 8 = 256 planes
#define MAXOBJ			(400)	//* Maximum 24-byte-primitives catered for in packet area

//* For money bag sprite management
#define MAX_COINS_IN_BAG	(100)
#define FIX_COINS_PER_SCAN	(MAX_COINS_IN_BAG<<8)		//* (max*ONE)/16

//* Macros relating to display area
#define SCREEN_X		(320)		//* Display area size(horizontal)
#define SCREEN_Y		(240)		//* Display area size(vertical)
#define SCROLLX_MAX		(-192)		//* Maximum left X coord for background top-left sprite
#define SCROLLY_MAX		(-272)		//* Maximum up Y coord for background top-left sprite

//* Settings for 'attribute' member of GsSPRITE object
#define A_BRIGHT_ON		(0UL)
#define A_BRIGHT_OFF	(1UL<<6)
#define A_4BIT_CLUT		(0UL)
#define A_8BIT_CLUT		(1UL<<24)
#define A_15BIT_NOCLUT	(1UL<<25)
#define A_ROTATE_ON		(0UL)
#define A_ROTATE_OFF	(1UL<<27)
#define A_TRATE_1		(0UL)
#define A_TRATE_2		(1UL<<28)
#define A_TRATE_3		(1UL<<29)
#define A_TRATE_4		(3UL<<28)
#define A_TRANS_ON		(1UL<<30)
#define A_TRANS_OFF		(0UL)
#define A_DISPLAY_ON	(0UL)
#define A_DISPLAY_OFF	(1UL<<31)

//* Preset (bit-significant) values for .frameLock/.currLock members of SCTRL
//* Note: the MSB of these values is left-shifted out when setting .currLock
//* with the functions below.
#define LOCK_NOFRAMES	(0xffffffffU)
#define LOCK_ALTFRAMES	(0xaaaaaaaaU)
#define LOCK_2FRAMES	(0x24924924U)
#define LOCK_3FRAMES	(0x88888888U)
#define LOCK_4FRAMES	(0x21084210U)
#define LOCK_5FRAMES	(0x20820820U)

//* Energy/ammo bar constant settings
#define ENERGY_BAR_X	(10)
#define ENERGY_BAR_Y	(225)
#define AMMO_BAR_X		(170)
#define AMMO_BAR_Y		(225)
#define BAR_MAX			(140)

//* Function for setting .currLock
#define RunThisTime(lock)	((lock<<1)+1)	//* Set 1st bit
#define RunNextTime(lock)	(lock<<1)		//* Reset 1st bit

//* Values for u member of GsSPRITE shadow sprites
#define SHAD_32WIDE		(0)
#define SHAD_16WIDE		(32)
#define SHAD_8WIDE		(48)

//* ICSAL command constants
#define DATA_END		(0x7fffffff)	//* End-of-data marker for 'set_data_loop_start' ICSAL command
#define INFINITE_LOOP	(0)				//* Infinite loop counter setting for 'set_loop_start' ICSAL command
#define RANGE_LOOP		(0x7ffffffe)	//* Causes loop counter to tally with bullRange

//* Debug macro functions to print various types of expressions/variables
#define dprinti(expr)	(printf(#expr "=%d\n", (expr)))		//* int
#define dprintu(expr)	(printf(#expr "=%u\n", (expr)))		//* u_int
#define dprintp(expr)	(printf(#expr "=%p\n", (expr)))		//* pointer

//* Macros to un-clutter code
#define SET_MOVE_DOWN			sp->u=(scp->currFrame<<5); sp->v=0; scp->accelX=0; scp->accelY=scp->speed; scp->dir=DIR_DOWN;
#define SET_MOVE_UP				sp->u=128+(scp->currFrame<<5); sp->v=0; scp->accelX=0; scp->accelY=-scp->speed; scp->dir=DIR_UP;
#define SET_MOVE_LEFT			sp->u=128+(scp->currFrame<<5); sp->v=32; scp->accelX=-scp->speed; scp->accelY=0; scp->dir=DIR_LEFT;
#define SET_MOVE_RIGHT			sp->u=(scp->currFrame<<5); sp->v=32; scp->accelX=scp->speed; scp->accelY=0; scp->dir=DIR_RIGHT;
#define SET_MOVE_UP_LEFT		sp->u=128+(scp->currFrame<<5); sp->v=64; scp->accelX=scp->accelY=-scp->speed; scp->dir=DIR_UP_LEFT;
#define SET_MOVE_UP_RIGHT		sp->u=(scp->currFrame<<5); sp->v=64; scp->accelX=scp->speed; scp->accelY=-scp->speed; scp->dir=DIR_UP_RIGHT;
#define SET_MOVE_DOWN_RIGHT		sp->u=(scp->currFrame<<5); sp->v=96; scp->accelX=scp->accelY=scp->speed; scp->dir=DIR_DOWN_RIGHT;
#define SET_MOVE_DOWN_LEFT		sp->u=128+(scp->currFrame<<5); sp->v=96; scp->accelX=-scp->speed; scp->accelY=scp->speed; scp->dir=DIR_DOWN_LEFT;

#define BABY_BB_DOWN			scp->bbXOff=7; scp->bbYOff=18; scp->bbW=18; scp->bbH=14; scp->topOff=20;
#define BABY_BB_DOWN_LEFT		scp->bbXOff=6; scp->bbYOff=17; scp->bbW=20; scp->bbH=12; scp->topOff=20;
#define BABY_BB_LEFT			scp->bbXOff=5; scp->bbYOff=14; scp->bbW=22; scp->bbH=8; scp->topOff=20;
#define BABY_BB_UP_LEFT			scp->bbXOff=6; scp->bbYOff=17; scp->bbW=20; scp->bbH=12; scp->topOff=20;
#define BABY_BB_UP				scp->bbXOff=7; scp->bbYOff=19; scp->bbW=18; scp->bbH=14; scp->topOff=20;
#define BABY_BB_UP_RIGHT		scp->bbXOff=6; scp->bbYOff=17; scp->bbW=20; scp->bbH=12; scp->topOff=20;
#define BABY_BB_RIGHT			scp->bbXOff=5; scp->bbYOff=14; scp->bbW=22; scp->bbH=8; scp->topOff=20;
#define BABY_BB_DOWN_RIGHT		scp->bbXOff=6; scp->bbYOff=17; scp->bbW=20; scp->bbH=12; scp->topOff=20;

#define BOY_MOVE_DOWN			sp->u=(scp->currFrame<<5); sp->v=0; scp->accelX=0; scp->accelY=scp->speed; scp->dir=DIR_DOWN;
#define BOY_MOVE_UP				sp->u=128+(scp->currFrame<<5); sp->v=0; scp->accelX=0; scp->accelY=-scp->speed; scp->dir=DIR_UP;
#define BOY_MOVE_LEFT			sp->u=128+(scp->currFrame<<5); sp->v=36; scp->accelX=-scp->speed; scp->accelY=0; scp->dir=DIR_LEFT;
#define BOY_MOVE_RIGHT			sp->u=(scp->currFrame<<5); sp->v=36; scp->accelX=scp->speed; scp->accelY=0; scp->dir=DIR_RIGHT;
#define BOY_MOVE_UP_LEFT		sp->u=128+(scp->currFrame<<5); sp->v=72; scp->accelX=scp->accelY=-scp->speed; scp->dir=DIR_UP_LEFT;
#define BOY_MOVE_UP_RIGHT		sp->u=(scp->currFrame<<5); sp->v=72; scp->accelX=scp->speed; scp->accelY=-scp->speed; scp->dir=DIR_UP_RIGHT;
#define BOY_MOVE_DOWN_RIGHT		sp->u=(scp->currFrame<<5); sp->v=108; scp->accelX=scp->accelY=scp->speed; scp->dir=DIR_DOWN_RIGHT;
#define BOY_MOVE_DOWN_LEFT		sp->u=128+(scp->currFrame<<5); sp->v=108; scp->accelX=-scp->speed; scp->accelY=scp->speed; scp->dir=DIR_DOWN_LEFT;

#define BOY_BB_DOWN				scp->bbXOff=8; scp->bbYOff=8; scp->bbW=15; scp->bbH=7; scp->topOff=27;
#define BOY_BB_DOWN_LEFT		scp->bbXOff=7; scp->bbYOff=8; scp->bbW=14; scp->bbH=8; scp->topOff=27;
#define BOY_BB_LEFT				scp->bbXOff=7; scp->bbYOff=7; scp->bbW=15; scp->bbH=7; scp->topOff=27;
#define BOY_BB_UP_LEFT			scp->bbXOff=7; scp->bbYOff=9; scp->bbW=14; scp->bbH=8; scp->topOff=27;
#define BOY_BB_UP				scp->bbXOff=8; scp->bbYOff=8; scp->bbW=15; scp->bbH=7; scp->topOff=27;
#define BOY_BB_UP_RIGHT			scp->bbXOff=10; scp->bbYOff=9; scp->bbW=14; scp->bbH=8; scp->topOff=27;
#define BOY_BB_RIGHT			scp->bbXOff=9; scp->bbYOff=7; scp->bbW=15; scp->bbH=7; scp->topOff=27;
#define BOY_BB_DOWN_RIGHT		scp->bbXOff=10; scp->bbYOff=8; scp->bbW=14; scp->bbH=8; scp->topOff=27;

//* Structure to manage control of HUD box sprites
struct HUDS {
	RECT		src;
	int			destX;
	int			destY;
	int			leftX, tlX, tlY;
	int			charsDone;
	int			u, v;
	struct HUDS	*freeLink;
};

//* Structure to manage control of sprite objects
struct SCTRL {
	int	wx, wy;					//* World coords of sprite (bottom-left corner)
	int wxMid, wyMid;			//* World coords of sprite bounding-box centre
	int shadHW;					//* Half width of associated shadow sprite
	int	accelX, accelY;			//* Controls movement of sprite in X and Y directions
	int speed;					//* Sprite speed in pixels-per-update
	int	repsPerFrame;			//* Times a frame is repeated before being changed
	int	frameCount;				//* Count-down from repsPerFrame for frame change
	int	currFrame;				//* Sprites current frame number (0 to (total frames - 1))
	int	alive;					//* Flags if sprite is alive and so in aliveSprites linked list
	struct SCTRL *aliveLinkF;	//* aliveSprites doubly-linked list forward link
	struct SCTRL *aliveLinkB;	//* aliveSprites doubly-linked list backward link
	int dir;					//* Movement direction code (see enum below for values)
								//* Note: also used in update_ufo_fall as ufoSway[] index
	int moveCount;				//* Count-down (from moveMax) to sprite direction change
								//* Note: also used to signal when UFO has reached destination when laying a mine
	int moveMax;				//* Used to set moveCount
	u_int frameLock;			//* Bit-significant: true, aligned/unshifted version used to set currLock
	u_int currLock;				//* Current version of frameLock: &'d with frameKey to authorize sprite update
	int ID;						//* General sprite type ID: used to id sprites after collision
	int subID;					//* Specific sprite type ID/current action
								//* Note: holds controller index for HUD box sprites
	u_int lifeCount;			//* Frame countdown until pickup expires (see ServiceICSALspritesF)
	int bbXOff;					//* X offset of bounding-box from world X base coord
	int bbYOff;					//* Y offset of bounding-box from world Y base coord
	int bbW;					//* Sprite's collision bounding-box width
	int bbH;					//* Sprite's collision bounding-box height
	int topOff;					//* Y offset from base line to 3D top of sprite face NB: base line=1 (not 0)
	int imHit;					//* Collision status flag: 1=has collided 0=not collided
	int high;					//* No. of pixel units a sprite's base line is off the ground
	int shadBase;				//* On-the-ground shadow size: 0=biggest 9=smallest
	int shadStat;				//* Turns sprite's shadow/reflection on(1) and off(0)
	int isLight;				//* Flags whether sprite is a light-source(1), or not(0)
	int unintICSAL;				//* Flags whether ICSAL proc is uninterruptible by collision
	int *ICSALop;				//* Pointer to current ICSAL op-code
	int *ICSALloopStart;		//* Pointer to start op-code of an ICSAL loop
	int *ICSALdataLoopStart;	//* Pointer to start op-code of an ICSAL data loop
	int *ICSALdataStart;		//* Pointer to first item of data
	int *ICSALdata;				//* Pointer to ICSAL data
	int ICSALloopCount;			//* Holds ICSAL loop iteration count
	struct SCTRL *freeLink;		//* Free sprite linked list ring pointer
	struct SCTRL *sectorLink;	//* Collision detection linked list sector link
	GsSPRITE *spriteLink;		//* Pointer to associated GsSPRITE
	GsSPRITE *shadLink;			//* Pointer to associated shadow sprite
	struct SCTRL *target;		//* Pointer to target sprite when chasing, following etc.
};

//* Structure to hold a games sprite's preset settings
struct SGROUP {
	struct SCTRL	sctrl;
	GsSPRITE		sprite;
	GsSPRITE		shad;
};

//* Structure to hold high score entries
struct HISCORE {
	u_int			score;			//* Score value
	struct SCTRL	*sScp;			//* Pointer to 1st linked sprite holding score
	char			name[5];		//* Name (4 characters + NULL)
	struct SCTRL	*nScp;			//* Pointer to 1st linked sprite holding name
};

//* Object placement grid coord pair (row, column)
struct GRID_PAIR {
	char	r;
	char	c;
};

//* Movement direction values for .dir member of SCTRL structure
enum {
	DIR_DOWN, DIR_DOWN_LEFT, DIR_LEFT, DIR_UP_LEFT,
	DIR_UP, DIR_UP_RIGHT, DIR_RIGHT, DIR_DOWN_RIGHT
};

//* Index values for timData[] array
enum {
	TIM_BG256,
	TIM_BLITBOY,
	TIM_EN_CCLUT,
	TIM_EN_PCLUT,
	TIM_EN_OCLUT,
	TIM_ENEMY1,
	TIM_SHADZ,
	TIM_BODYBANG,
	TIM_XPLODE1,
	TIM_BULLBANG,
	TIM_GUNSMOKE,
	TIM_BULLET,
	TIM_WNOISE,
	TIM_BABY,
	TIM_HEART,
	TIM_BABY_CLUT2,
	TIM_BABY_CLUT3,
	TIM_UFO_CLUT,
	TIM_SMOKE_CLUT3,
	TIM_SMOKE_CLUT4,
	TIM_COIN,
	TIM_COIN_CLUT2,
	TIM_COIN_CLUT3,
	TIM_BB_CHARS,
	TIM_HELMET,
	TIM_BB_SET,
	TIM_VC_LOGO1,
	TIM_VC_LOGO2,
	TIM_FRONT1,
	TIM_FRONT2,
	TIM_TVBEAM,
	TIM_DUMMY,
	TIM_MASKCLUT,
	TIM_SCORESET,
	TIM_POLYCART,
	TIM_EN_WCLUT,
	TIM_RBOW_FIRE,
	TIM_FRUIT_SPLAT,
	TIM_FRUIT_PEAR,
	TIM_FDROP_FIRE,
	TIM_FRUIT_APPLE,
	TIM_FRUIT_CHERRY,
	TIM_FRUIT_LEMON,
	TIM_FRUIT_MELON,
	TIM_FRUIT_ORANGE,
	TIM_FRUIT_GRAPES,
	TIM_FRUIT_SBERRY,
	TIM_FDROP_CLUT2,
	TIM_FDROP_CLUT3,
	TIM_FDROP_CLUT4,
	TIM_FDROP_CLUT5,
	TIM_FDROP_SPLASH,
	TIM_MINE,
	TIM_MILKBOT,
	TIM_BURGER,
	TIM_PIGGY,
	TIM_POWFLASH,
	TIM_MOONRING,
	TIM_MOONBALL,
	TIM_BEANS,
	TIM_BONUS,
	TIM_MULTY,
	TIM_MINECOMP,
	TIM_MONEYBAG,
	TIM_HOLOBALL,
	TIM_MULTYOSD,
	TIM_RANGEHUD,
	TIM_BATTERY,
	TIM_BG_CLUT1,
	TIM_BG_CLUT2,
	TIM_BG_CLUT3,
	TIM_BG_CLUT4,
	TIM_BG_CLUT5,
	TIM_MESS_HUD,
	TIM_MASK256,
	TIM_HAND,
	TIM_PSX_OPTS,
	TIM_BB_ROLL,
	TIM_FLAG,
	TIM_HALO,
	TIM_UFO,
	TIM_PAUSE,
	TIM_FR_BONUS,
	TIM_FR_MULTY
};

//* Sprite type constants for .ID member of SCTRL structure
enum {
	ID_SOFT_ICSAL,		//* 0 (ignored by collision detection)
	ID_BLITTER_BOY,		//* 1
	ID_BULLET,			//* 2
	ID_ENEMY,			//* 3
	ID_TELEVATOR,		//* 4
	ID_BABY,			//* 5
	ID_PICKUP,			//* 6
	ID_MINE,			//* 7
	ID_MOONBALL,		//* 8
	ID_DECOY			//* 9
};

//* Constants for .subID member of SCTRL structure
enum {
	NORMAL,					//* Not important!

	BOY_GAME_OVER=1,		//* For ID_BLITTER_BOY
	BOY_LEVEL_UP,

	BULLET_NORMAL=1,		//* For ID_BULLET
	BULLET_RAIN_DEATH,
	BULLET_FRUIT_DROP,

	TOTAL_ALIVE=0,			//* Used for enemyAlive[][]
	ENEMY_RED_GHOST,		//* For ID_ENEMY
	ENEMY_PINK_GHOST,
	ENEMY_CYAN_GHOST,
	ENEMY_ORANGE_GHOST,
	ENEMY_UFO,
	ENEMY_TYPE_MAX,			//* Used to set enemyAlive[x][2] array size

	MINE_PRIMED=1,			//* For ID_MINE
	MINE_EXPLODE,

	BABY_WANDER=1,			//* For ID_BABY
	BABY_FOLLOW,
	BABY_CRY,
	BABY_GOTO_TV,

	PICKUP_GOLD_COIN=1,		//* For ID_PICKUP
	PICKUP_SILVER_COIN,
	PICKUP_BRONZE_COIN,

	CART_RAIN_DEATH=0x100,		//* 256 is PolyCart ID bit
	CART_FRUIT_DROP,

	PICKUP_FRUIT_CHERRY=0x200,	//* 512 is fruit ID bit
	PICKUP_FRUIT_SBERRY,		//* Note: in ascending bonus order
	PICKUP_FRUIT_ORANGE,
	PICKUP_FRUIT_LEMON,
	PICKUP_FRUIT_PEAR,
	PICKUP_FRUIT_APPLE,
	PICKUP_FRUIT_GRAPES,
	PICKUP_FRUIT_MELON,

	PICKUP_MILKBOT=0x400,		//* 1024 is pickup ID bit
	PICKUP_BURGER,
	PICKUP_PIGGY,
	PICKUP_MOONRING,
	PICKUP_BEANS,
	PICKUP_HOLOBALL,
	PICKUP_BATTERY,
	PICKUP_FLAG					//* For MODE: SURVIVE only!
};

//* Values for tvStat
enum {
	TV_OFF,
	TV_ON,
	TV_TURNING_OFF,
	TV_TURNING_ON
};

//* Values for gameStat
enum {
	GAME_END,
	GAME_ON,
	GAME_OVER,
	GAME_QUIT,
	GAME_LEVEL_UP,
	GAME_START,
	GAME_TITLE_SCREEN,
	GAME_MENU_SCREEN,
	GAME_LOGO_SCREEN,
	GAME_MOVE_SCREEN,
	GAME_CONTROL_SCREEN,
	GAME_HISCORE_SCREEN,
	GAME_ENTER_SCORE_SCREEN,
	GAME_DEBRIEF_SCREEN
};

//* Values for gameType
enum {
	MODE_MISSION,
	MODE_SURVIVE
};

//* Values for FX_Splice_Screen()
enum {
	FX_MELT_SPLICE,
	FX_NORMAL_SPLICE,
	FX_RIP_SPLICE,
	FX_RIP2_SPLICE,
	FX_DIAG_SPLICE
};

//* Index values for preset[] array
enum {
	PRESET_POOL_DEFAULT,
	PRESET_NORMAL_BULLET,
	PRESET_NORMAL_BULLET_BLUR1,
	PRESET_NORMAL_BULLET_BLUR2,
	PRESET_GUNSMOKE,
	PRESET_RBOW_BULLET,
	PRESET_RBOW_BULLET_BLUR1,
	PRESET_RBOW_BULLET_BLUR2,
	PRESET_FDROP_BULLET,
	PRESET_FDROP_BULLET_BLUR,
	PRESET_FDROP_BUILDUP,
	PRESET_FRUIT_APPLE,
	PRESET_FRUIT_ORANGE,
	PRESET_FRUIT_LEMON,
	PRESET_FRUIT_MELON,
	PRESET_FRUIT_CHERRY,
	PRESET_FRUIT_GRAPES,
	PRESET_FRUIT_PEAR,
	PRESET_FRUIT_SBERRY,
	PRESET_FRUIT_SPLASH,
	PRESET_EXPLODE_FIREBALL,
	PRESET_EXPLODE_BODY,
	PRESET_EXPLODE_COIN,
	PRESET_ENEMY_GHOST,
	PRESET_ENEMY_UFO,
	PRESET_SHOT_UFO,
	PRESET_POLYCART,
	PRESET_MINE,
	PRESET_PICKUP_MILKBOT,		//* Keep this as 1st pickup preset for add_pickup in levman.c!
	PRESET_PICKUP_BURGER,
	PRESET_PICKUP_PIGGY,
	PRESET_PICKUP_MOONRING,
	PRESET_PICKUP_BEANS,
	PRESET_PICKUP_HOLOBALL,
	PRESET_PICKUP_BATTERY,
	PRESET_PICKUP_FLAG,
	PRESET_POWFLASH,
	PRESET_MOONBALL1,
	PRESET_MOONBALL2,
	PRESET_MOONBALL3,
	PRESET_MOONBALL4,
	PRESET_MOONBALL5,
	PRESET_MOONBALL6,
	PRESET_MOONBALL7,
	PRESET_MOONBALL8,
	PRESET_BONUS_SCORE,
	PRESET_BONUS_MULTY,
	PRESET_MINE_COMP1,
	PRESET_MINE_COMP2,
	PRESET_MINE_COMP3,
	PRESET_MINE_COMP4,
	PRESET_MINE_COMP5,
	PRESET_MINE_COMP6,
	PRESET_MINE_COMP7,
	PRESET_MINE_COMP8,
	PRESET_MINE_COMP9,
	PRESET_MINE_COMP10,
	PRESET_MINE_COMP11,
	PRESET_MINE_COMP12,
	PRESET_MINE_COMP13,
	PRESET_MINE_COMP14,
	PRESET_MINE_COMP15,
	PRESET_MINE_COMP16,
	PRESET_RANGE_HUD,
	PRESET_DECOY_BOYR,
	PRESET_DECOY_BOYG,
	PRESET_DECOY_BOYB,
	PRESET_FRUIT_BONUS,
	PRESET_FRUIT_MULTY,

	NUM_PRESETS					//* Used to set array size
};

//* Sound effects program number constants
enum {
	SFX_GUN_NORMAL,
	SFX_ENEMY_EXPLODE1,
	SFX_BUZZER,
	SFX_WNOISE,
	SFX_TELEVATOR,
	SFX_COMPUTER,
	SFX_DADA,
	SFX_GUN_RAINBOW,
	SFX_BONUS,
	SFX_SAY_OW,
	SFX_LASER,
	SFX_EVAP,
	SFX_FALL,
	SFX_SPLAT,
	SFX_PING,
	SFX_BABY_HOWL,
	SFX_PIGGY_BUST,
	SFX_GUN_FDROP,
	SFX_SPIN_SCREEN,
	SFX_MELT_SCREEN,
	SFX_LEV_SCREEN,
	SFX_PEEL_SCREEN,
	SFX_CART,
	SFX_WOOHOO,
	SFX_BGM,
	SFX_GHOST
};


//* Access declarations for global objects defined in main.c
extern GsSPRITE *sprt;				//* Points to main game sprites
extern struct SCTRL *sCtrl;			//* Associated sprite control structures
extern GsSPRITE *shads;
extern u_long pStat;				//* Holds latest pad status read by PadActions()
extern u_long lastFireFrame;		//* Frame count when last bullet was fired
extern int bullRange;
extern int bullSpeed;
extern int bullLoop;
extern int tvStat;
extern int followDist;
extern struct SCTRL *lastInLine;
extern int fireDelay;				//* Frame delay (vSyncs) between each fired bullet
extern struct SCTRL *aliveSprites;	//* Points to 1st alive sprite SCTRL in linked list
extern struct SCTRL *freeSprites;	//* Points to 1st free sprite in main pool
extern GsIMAGE timData[];			//* Holds info on all loaded TIM's
extern u_int tvLightLock;
extern u_int tvLightCLock;
extern int beamSpeed;
extern int babiesSaved;
extern int currLevel;				//* Current game level number
extern int enemyAlive[][2];
extern int mineMin;
extern int mineCount;
extern int mineLaying;
extern int emergeDelay;
extern int killCount;
extern int killsPerPickup;
extern int ok2beam;
extern int tvVoice;

extern RECT plasRect;				//* Access for screens.c
extern int plasmaX, plasmaY, plasmaBase;
extern void (*primSort[]) (GsSPRITE *, GsOT *, u_short);

extern int gameStat;				//* Game status control flag
extern int gameType;
extern struct SCTRL	*dummyScp;
extern struct SCTRL	*messHudScp;
extern int energyAdd;
extern int energyHit;
extern int energyLeft;
extern int ammoAdd;
extern int ammoUse;
extern int ammoLeft;
extern GsGLINE *ammoBarp;
extern int flashCnt;
extern int currScore;
extern int BBtrueSpeed;
extern int strafe;
extern int bonusMulty;
extern struct SCTRL *bonusMultyScp;
extern u_int bonusVal[][6];
extern struct HUDS HUDbox[];
extern GsSPRITE		*bg1, *bg2, *bg3, *bg4;
extern struct SGROUP preset[];
extern void (*FireFunc) (void);
extern struct SCTRL *moneybagScp;
extern int coinsInBag;
extern struct SCTRL	*moonScp[8];
extern struct SCTRL	*chaseTarget;
extern int stopRange;
extern struct SCTRL	*rangeScp;
extern struct SCTRL	*decoyScp;
extern int babyStrong;
extern int polyStat;
extern struct HISCORE hiScore[];
extern u_int surviveFrames;
extern int flagGone;
extern int flagCnt;
extern int lastFruit;

//* Pointers to LIBPS globals
extern short *psdidx;				//* Double buffer index
extern u_long *psdcnt;				//* Frame switch count
extern short *psdofsx;
extern short *psdofsy;

//* Prototypes for global functions in main.c
void AliveLinkIn(struct SCTRL *scp);
void AliveLinkOut(struct SCTRL *scp);
int SpriteIsVis(struct SCTRL *scp);
int ShadowIsVis(struct SCTRL *scp);
struct SCTRL *GetSprite(int numSprites);
void PutSprite(struct SCTRL *scp);
int GetHUDidx(void);
void PutHUDidx(int idx);
struct SCTRL *CentreText(char *text, int topLine, int spacing);
struct SCTRL *LjustText(char *text, int startX, int y, int spacing);
void MakeAmmoBarText(char *charp);
void PutGrid(int wx, int wy);
struct GRID_PAIR *GetRandGrid(void);
void GetAbsGrid(int r, int c);
void ServiceICSALsprites(void);
void EjectPolyCart(void);
void PlaceNextFlag(void);