POW2.ASM

   	.FILE	"POW2.ASM (ORBITING LASER)"
	.TITLE	"ROBO-RAMA GAME PROGRAM"
	.WIDTH	132
	.OPTION	B,D,L,T
	.MNOLIST

;
; INITIATED:		 APRIL 26,1989
; MODIFIED:		 !
; SOFTWARE:		 MARK TURMELL & ROBERT ASHWORTH
;
; COPYRIGHT (C) 1989 WILLIAMS ELECTRONICS GAMES, INC.
;
;
; GET THE SYSTEM STUFF

	.INCLUDE	"MPROC.EQU"		;MPROC EQUATES
	.INCLUDE	"DISP.EQU"		;DISPLAY PROC. EQUATES
	.include	"sys.inc"	;z unit system equates
	.include	"macros.hdr"	;macros definitions
	.INCLUDE	"IMGTBL.GLO"
	.INCLUDE	"ROBO.EQU"
;
;SOUND HEADERS USED
;
	.REF	WOO2
;
;SYMBOLS EXTERNALLY DEFINED
;
	.REF		PUTA7,FLASHME
	.REF		GETANIXY,AFONT0
	.REF		GPALOBJ,STFOBJ,INSOBJ,ADJSTWTL
	.REF		FRANIM,KILOBJ,KILALL
	.REF		SCRTST
	.REF		DELOBJ
	.REF		GETCOS
	.REF		GETSIN
	.REF		DO_BND
	.REF		EXISTP
	.REF		KILL
	.REF		ICNFLG
;
;SYMBOLS DEFINED IN THIS FILE
;
	.DEF		POW2ON,LSHIT
	.DEF		LASRX,LASRY,ALIGNXY
;
;UNINITIALIZED RAM DEFINITIONS
;
	.BSS	LASRX,32
	.BSS	LASRY,32

;
;EQUATES
;
ADLTA		.EQU	(411775/(160/2))

; LASER/BLADES DATA STRUCTURE
;
PTRX	.EQU	PDATA		;UHW		;LAST X
PTRY	.EQU	PDATA+16	;UHW		;LAST Y
ANIMTIK	.EQU	PDATA+32	;UHL		;FRAME SLEEP TIME
THETA	.EQU	PDATA+64        ;SHL		;CURRENT PROGRESSION
DELTA	.EQU	PDATA+96	;SHL		;DELTA ANGLE
LEG	.EQU	PDATA+128	;UHL LEG OF PLAYER WHO COLLECTED ME
;

;
;EQUATES FOR THIS FILE
;
;
	.TEXT
;
POW2ON:
;FROM COLLISION ROUTINE!
	MOVE	A0,A9			;LEG PTR OF WHO GOT ME
;	MOVE	*A0(OPLINK),A0,L
;	MOVK	1,A1
;	MOVB	A1,*A0(LSRFLG)		;HELPER ON FLAG FOR THIS PLAYER;
	MOVE	A8,A0
	CALLA	DELOBJ
	MOVI	WOO2,A0
	CALLA	ONESND
	MOVK	1,A11			;1 ORBITING OBJECT
ALL1:
	CREATE	LSRPID,LASER
	DSJS	A11,ALL1
	RETS

; DO LASER MOVEMENT LOGIC 
;A11 = OFFSET FOR VECTOR POINT FOR STARTING POSITION OF LASER
LASER:
;A9=LEG IMG PNTR OF PLAYER WHO TOUCHED ME
	MOVE	*A9(OPLINK),A7,L
	MOVK	1,A0
	MOVB	A0,*A7(BNDTYP)
	MOVB	A0,@ICNFLG
	CALLA	DO_BND

	CLR	A0
	MOVB	A0,*A13(ANIMTIK)
	MOVI	ADLTA,A0	
	MOVE	A0,*A13(DELTA),L
	CALLA	SETPOINT
;
ENCIRCLE:
; MAKE LASER MOVE IN A CIRCLE AROUND PLAYER

	CALLA	ANILASER		;ANIMATE LASER
	CALLR	ALIGNXY   	     	;KEEP OBJECT ALIGNED WITH PLAYER
	MOVE	*A13(THETA),A2,L      	;PROGRESSIVE  THETA
	MOVE	*A13(DELTA),A0,L      	;NEXT DELTA ANGLE
	ADD	A2,A0				    
	CALLA	GETCOS
	MOVE	A0,A11
	MOVK	2,A0
	MPYS	A0,A11
	MOVE	A14,*A13(THETA),L
	MOVE	A14,A0
	CALLA	GETSIN
	MOVE	A0,A3
	MOVK	2,A0
	MPYS	A0,A3
	MOVE	A3,A10
	MOVE	*A8(OXVAL),A3,L
	MOVE	*A8(OYVAL),A4,L
	ADD	A11,A3
	ADD	A10,A4
	MOVE	A3,*A8(OXVAL),L
	MOVE	A4,*A8(OYVAL),L
	SLOOP	1,ENCIRCLE
ANILASER:
;ANIMATE LASER
	MOVB	*A13(ANIMTIK),A0
	DEC	A0
	MOVB	A0,*A13(ANIMTIK)
	JRNN	NOTNEXT
;FALLS HERE IF NEGATIVE
	MOVK	4,A1		
	JSRP	FRANIM			;1 FRAME STEP
	MOVB	A0,*A13(ANIMTIK)	;SAVE SLEEP TIME BETWEEN FRAMES
	JRNC	NOTNEXT
	MOVI	FLASER,A9
NOTNEXT:
	CALLA	GETANIXY
	MOVE	A2,@LASRY,L
	MOVE	A3,@LASRX,L
	RETS
;
LASERDIE:
	MOVE	A11,*A8(OXVEL),L
	MOVE	A10,*A8(OYVEL),L
;TURN HELPER WHITE, FLOAT AWAY
;	CLR	A0
;	MOVE	A0,*A8(OID)
FLYER:
;	CALLR	ANILASER			;DO ANIMATION 
	MOVI	[023H,021H],A2
	MOVI	[0FCH,0171H],A3
	CALLA	SCRTSTG
	JRNZ	LSER
	MOVI	006060000H,A9
	CREATE	0,FLASHME
	SLOOP	10,FLYER
LSER:
	CLR	A0
	MOVE	A0,@LASRX,L
	MOVE	A0,@LASRY,L
	MOVE	A8,A0
	CALLA	DELOBJ			;KILL IMAGE
	CLR	A1
	NOT	A1			;MASK FOR PROCESS EXIST ROUTINE
	MOVK	2,A3			;ASSUME CHAINSAW'S BOUNDARY
;MAKE THIS SMARTER!
	MOVE	*A13(PROCID),A2,W	;SAVE CURRENT PROCESS ID
	MOVI	DUM_ID,A0
	MOVE	A0,*A13(PROCID),W	;REPLACE ID FOR THIS PROCESS
	MOVI	CHNSWPID,A0		;CHAINSAW PROCESS 
	CALLA	EXISTP
	JRNZ	SETAREA 		;BR = DOES EXIST
	MOVK	1,A3			;ASSUME CHNSW'S BOUNDARY
;WHAT?
	MOVI	LSRPID,A0		;LASER PROCESS ID
	CALLA	EXISTP
	JRNZ	SETAREA			;BR = DOES EXIST
	CLR	A3    			;ASSUME NORMAL BOUNDARY
SETAREA:
	MOVE	*A13(LEG),A0,L
	MOVE	*A0(OPLINK),A7,L

	MOVB	A3,*A7(BNDTYP)
	CLR	A2
	MOVB	A2,*A7(PRVBND)
	CALLA	DO_BND
	DIE
ALIGNXY:
; KEEP LASER WITHIN X CENTERPOINT OF PLAYER
; PARMS:
;
; A8 = PTR TO PLINDX
;
	MOVE	*A13(PTRX),A4,W		;OLD X,Y VALUES
	MOVE	*A13(PTRY),A5,W
	MOVE	A8,A10
	MOVE	*A13(LEG),A8,L
	CALLA	GETANIXY   		;Y/X POSITION RETURNED IN A2,A3
	MOVE	A10,A8
	SWAP	A2,A3
	SRL	16,A2
	SRL	16,A3
	MOVE	A4,A4
	JRZ	PK
DIFF:
	CMP	A4,A2
	JREQ	DOY
	JRGT	ADDX			;NEW X POS > OLD X POS
SUBX:
	SUB	A2,A4
	MOVE	*A8(OXPOS),A6
	SUB	A4,A6
	MOVE	A6,*A8(OXPOS)
	JRUC	DOY
ADDX:
	SUB	A2,A4
	NEG	A4
	MOVE	*A8(OXPOS),A6
	ADD	A4,A6
	MOVE	A6,*A8(OXPOS)
DOY:
	CMP	A5,A3
	JREQ	PK			;NO DIFFERENCES IN X,Y BYE!
	JRGT	ADDY			;NEW Y POS > OLD Y POS
SUBY:
	SUB	A3,A5
	MOVE	*A8(OYPOS),A6
	SUB	A5,A6
	MOVE	A6,*A8(OYPOS)
	JRUC	PK
ADDY:
	SUB	A3,A5
	NEG	A5
	MOVE	*A8(OYPOS),A6
	ADD	A5,A6
	MOVE	A6,*A8(OYPOS)
PK:
	MOVE	A2,*A13(PTRX),W
	MOVE	A3,*A13(PTRY),W
 	RETS

SETPOINT:
	MOVI	INITAB,A14
	CALLA	GPALOBJ			;ALLOCATE A COLOR PALETTE 
	CALLA	STFOBJ			;STUFF OBJECT DATA 
	MOVE	A13,*A0(OPLINK),L
	CALLA	ADJSTWTL		;PUT US IN THE WORLD
	CALLA	INSOBJ			;INSERT OBJECT INTO LIST
	MOVE	A0,A10
;A9=CORRECT LEG PTR
	MOVE	A9,*A13(LEG),L
;A7=A7 ALREADY?
	MOVE	*A9(OPLINK),A7,L	;LEGS HAVE SAME OPLINK AS TORSO!
;A7 NOW EQUALS TORSO PROC OF PLAYER WHO PICKED UP HELPER ICON
	MOVE	A0,*A7(LSRPTR),L
;THIS OKAY?
	MOVE	A9,A8
	CALLA	GETANIXY   		;Y/X POSITION RETURNED IN A2,A3
	MOVE	A10,A8
	ADDI	[5,0],A2
	MOVE	A2,*A8(OYVAL),L
	SUBI	[7,0],A3
	MOVE	A3,*A8(OXVAL),L
	CLR	A0
	MOVE	A0,*A13(PTRX),W		;OLD X,Y VALUES
	MOVE	A0,*A13(PTRY),W
	MOVE	A0,*A13(THETA),L
	MOVI	FLASER,A9
	RETS

LSHIT:
;CALLED FROM COLLISION ROUTINE
;ALSO CALLED FROM ROBO WHEN PLAYER DIES
;A8=HELPER IMG PNTR
	MMTM	SP,A0,A7,A13
;PUSHING ENOUGH STUFF HERE?
	CLR	A0
	MOVE	A0,*A8(OID)
	MOVE	*A8(OPLINK),A13,L	;GET PROCESS ID BACK
;HELPER TO FLY OFF
;RESET HERE
	MOVE	*A13(LEG),A0,L		;GET LEG I SURROUND
	MOVE	*A0(OPLINK),A0,L	;GET PLAYER PROC
	CLR	A7
	MOVE	A7,*A0(LSRPTR),L	;ZERO PLAYER PROC LASER PNTR
	MOVE	A13,A0
	MOVI	LASERDIE,A7
	CALLA	PUTA7		;THIS HLPR WILL NOW WAKE UP AT A7 ADDR
	MMFM	SP,A0,A7,A13
	RETS

INITAB:
	.LONG	0,0,HLPR1
	.WORD	171,DMAWNZ,CLSPLYR|TYPLSR	;171
	.LONG	0,0
;
;ANIMATION TABLE FOR LASER
;
FLASER:
	.LONG	HLPR1
	.WORD	3 
	.LONG	HLPR2
	.WORD	3 
	.LONG	HLPR3
	.WORD	3 
	.LONG	HLPR4
	.WORD	3 
	.LONG	HLPR5
	.WORD	3 
	.LONG	HLPR6
	.WORD	3 
	.LONG	0


	.END