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WSOBJ.MAC
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.TITLE WSOBJ OBJECT TABLES AND VECTOR DRAW ROUTINES
.INCLUDE WSCOMN ;<<<<<<<<<<<<<<<<<<<<<<<<<<<<
;===
ROOT==0 ;OVERLAY
GD$MDT==0F00 ;PART WAY UP TOWERS
;---
;---
M$AX ==-10+0
M$AY ==-10+0+2
M$AZ ==-10+0+0+4
M$BX ==-10+0+8
M$BY ==-10+0+8+2
M$BZ ==-10+0+8+4
M$CX ==-10+0+10
M$CY ==-10+0+10+2
M$CZ ==-10+0+10+4
M$TX ==-10+18+0
M$TY ==-10+18+2
M$TZ ==-10+18+4
M$VX ==-10+6
M$VY ==-10+6+8
M$VZ ==-10+6+10
;===
;GLOBAL OFFSETS
BJ$EQ ==26.
;MATH PROCESSOR
MBRAM ==5000 ;BASE ADDRESS
MBRAMZ ==MBRAM+1000 ;END OF SHARED RAM(4K BYTES,2KWORDS,512. BLOCKS)
;DEFINE TOP OF MATH BOX
M.GDZ ==MBRAMZ ;MUST BE D-PAGEABLE
M.GD ==M.GDZ-200 ;GROUND POINTS, 16. BYTES PER POINT, 32.POINTS
M$GDBC ==M.GD-MBRAM/8
M$GDNM ==M.GDZ-M.GD/8
M.GDFE ==M.GD-10 ;FRONT END FOR FAST GROUND TRANSFORM, USES 2 BLOCKS
M.GDCT ==0+M.GD ;COLOR FOR TOP OF TOWER
M.GDCB ==2+M.GD ;COLOR FOR BASE OF TOWER
M.GDSC ==4+M.GD ;SCALE TO DRAW WITH
M.GDXS ==0C+M.GD ;FIRST SCREEN X RESULT (MUST AGREE WITH M$GDXS)
M$GDXR ==6 ;ROTATED POINTS,X (+M.GDFE)
M$GDYR ==18 ;ROTATED POINTS,Y (+M.GDFE)
M$GDZR ==1A ;ROTATED POINTS,Z (+M.GDFE)
M$GDXS ==1C ;FINAL SCREEN X,Y (+M.GDFE)
.IIF NE,M.GDXS-<M$GDXS+M.GDFE>,.ERROR M.GDXS ;NOT AGREE WITH M$GDXS
;---
;D-PAGE RAM
.GLOBB BJ.BIC,BJ.BRT
.GLOBB BJ.CX,BJ.CY
.GLOBB BJ.DMC
.GLOBB BJ.ID
.GLOBB BJ.RAM
;---
;RAM
.GLOBL BJBIC,BJBICZ
.GLOBL BJ.PNT
;---
;OUTSIDE ROUTINES
.GLOBL GD$MDT
.GLOBL MGOWT
;---
;MATH BOX
.GLOBL M$BJBC
.GLOBL M$GDBC,M$GDXR,M$GDYR,M$GDZR
.GLOBL M.GDCB,M.GDCT,M.GDSC,M.GDXS
.GLOBL M$PAD
.GLOBL M$PERS
.GLOBB M$PSUB,M$PR2I,M$PRS2
.GLOBL M.BIC,M.BICH,M.BICL
.GLOBL M.DVD
.GLOBL M.GD,M.GDFE
.GLOBL M.OBJ
.GLOBL M.PCGO
.GLOBL M.QUO
.GLOBL M.S1
.GLOBL M.U1
.GLOBL M.XP,M.YP,M.ZP
.GLOBL M.XT,M.YT
;---
;VECTOR GENERATOR
.GLOBL VGCOPC,VGCGRN,VGCRED,VGCTRQ
.GLOBL VGCNTR
.GLOBL VGEDGB,VGEDGL,VGEDGR,VGEDGT
.GLOBL VGOFFY
.GLOBL VGSCAL
.GLOBL VJFLS
;---
;HARDWARE
.GLOBL DPRAM
;---
;SHIFT ROUTINES
;===
.MACRO .PAGG ;GLOBAL PAGE NUMBERS
.PAGEG J ;OBJECT DRAW
.ENDM
.CSECT OBJ
.PAGG
.MACRO .W$ A1,A2,A3 ;TYPE, SUBSCRIPT, EXPRESSION
.IF NB,<'A3'>
TD'A2''A1'=<'A3'> ;ASSIGN THE VALUE
.ENDC
.W0=TD'A2''A1 ;RETURN THE VALUE ALSO
.ENDM
;---
TD$EQ =-1 ;FIRST IS AT 0
;---
.MACRO .WP A1 ;START POINT TABLE ENTRY
TD$EQ =TD$EQ+1 ;ONE MORE OBJECT ENTRY
.IIF GE,TD$EQ-BJ$EQ,.ERROR ENLARGE BJBIC TABLE
TD$'A1' ==TD$EQ ;ASSINE SHAPE NAME
.W$ PC,\TD$EQ,. ;ASSIGN PC
.ENDM
;---
.MACRO .WPZ ;END OF OBJECT ENTRY
.W$ PC,\TD$EQ ;GET START PC
.W$ NM,\TD$EQ,.-.W0/6+1&0FFFE ;CALC # OF POINTS, IN PAIRS
.ENDM
;---
.MACRO .WPZ2 A1
.W$ PC,\TD$EQ ;GET START PC
TD$EQ =TD$EQ+1 ;ONE MORE OBJECT
.IIF GT,TD$EQ-BJ$EQ,.ERROR ENLARGE BJBIC TABLE
TD$'A1' ==TD$EQ ;ASSIGN SHAPE NAME
.W$ PC,\TD$EQ,.W0 ;PREVIOUS PC
.W$ NM,\TD$EQ,.-.W0/6+1&0FFFE ;CALC # OF POINTS, IN PAIRS
.ENDM ;---
TPNT:
.MACRO .P .1,.2,.3
.WORD .1'.*.S,.2'.*.S,.3'.*.S
.ENDM
.MACRO .PH .1,.2,.3
.WORD .1'*.S,.2'*.S,.3'*.S
.ENDM
;---
.S=13. ;TIE FIGHTER
.WP TIE
.P 0,0,0
.P -10,-16,18 ;LEFT OUTER FIN
.P 8,-16,18
.P 14,-16,0
.P 8,-16,-18
.P -10,-16,-18
.P -16,-16,0
.P -2,-16,2 ;SMALL CIRCLE ON LEFT FIN
.P 0,-16,2
.P 1,-16,0
.P 0,-16,-2
.P -2,-16,-2
.P -3,-16,0
.P -10,16,18 ;RIGHT FIN
.P 8,16,18
.P 14,16,0
.P 8,16,-18
.P -10,16,-18
.P -16,16,0
.P -2,16,2 ;SMALL CIRCLE ON RIGHT FIN
.P 0,16,2
.P 1,16,0
.P 0,16,-2
.P -2,16,-2
.P -3,16,0
.P -2,-6,2 ;INNER CIRCLE LEFT STRUT
.P 0,-6,2
.P 1,-6,0
.P 0,-6,-2
.P -2,-6,-2
.P -3,-6,0
.P -2,6,2 ;INNER CIRCLE RIGHT STRUT
.P 0,6,2
.P 1,6,0
.P 0,6,-2
.P -2,6,-2
.P -3,6,0
.P -4,-2,6 ;LARGE CIRCLE LEFT BODY
.P 2,-2,6
.P 6,-2,3
.P 6,-4,0
.P 6,-2,-3
.P 2,-2,-6
.P -4,-2,-6
.P -8,-2,0
.P -4,2,6 ;LARGE CIRCLE RIGHT BODY
.P 2,2,6
.P 6,2,3
.P 6,4,0
.P 6,2,-3
.P 2,2,-6
.P -4,2,-6
.P -8,2,0
.WPZ
;---
.S=13.
.WP TI1 ;EXPLODED TIE FIGHTER, LEFT WING AND STRUT
.P 0,0,0
.P -10,-2,18 ;LEFT OUTER FIN
.P 8,-2,18
.P 14,-2,0
.P 8,-2,-18
.P -10,-2,-18
.P -16,-2,0
.P -2,-2,2 ;SMALL CIRCLE ON LEFT FIN
.P 0,-2,2
.P 1,-2,0
.P 0,-2,-2
.P -2,-2,-2
.P -3,-2,0
.P -2,10,2 ;INNER CIRCLE LEFT STRUT
.P 0,10,2
.P 1,10,0
.P 0,10,-2
.P -2,10,-2
.P -3,10,0
.WPZ
;---
.S=13.
.WP TI2 ;EXPLODED TIE, RIGHT WING AND STRUT, ROTATED
.P 0,0,0
.P -10,18,2 ;RIGHT OUTER FIN
.P 8,18,2
.P 14,0,2
.P 8,-18,2
.P -10,-18,2
.P -16,0,2
.P -2,2,2 ;SMALL CIRCLE ON RIGHT FIN
.P 0,2,2
.P 1,0,2
.P 0,-2,2
.P -2,-2,2
.P -3,0,2
.P -2,2,-10 ;INNER CIRCLE RIGHT STRUT
.P 0,2,-10
.P 1,0,-10
.P 0,-2,-10
.P -2,-2,-10
.P -3,0,-10
.WPZ
;---
.S=13.
.WP TI3 ;EXPLODED TIE, CENTER CABIN
.P 0,0,0
.P -2,-6,2 ;INNER CIRCLE LEFT STRUT
.P 0,-6,2
.P 1,-6,0
.P 0,-6,-2
.P -2,-6,-2
.P -3,-6,0
.P -2,6,2 ;INNER CIRCLE RIGHT STRUT
.P 0,6,2
.P 1,6,0
.P 0,6,-2
.P -2,6,-2
.P -3,6,0
.P -4,-2,6 ;LARGE CIRCLE LEFT BODY
.P 2,-2,6
.P 6,-2,3
.P 6,-4,0
.P 6,-2,-3
.P 2,-2,-6
.P -4,-2,-6
.P -8,-2,0
.P -4,2,6 ;LARGE CIRCLE RIGHT BODY
.P 2,2,6
.P 6,2,3
.P 6,4,0
.P 6,2,-3
.P 2,2,-6
.P -4,2,-6
.P -8,2,0
.WPZ
;===
.S=10. ;DARTH VADER TIE FIGHTER
.WP RTH
.P 0,0,0
.P -18,-18,13 ;1-8 RIGHT OUTER WING
.P 18,-18,13
.P 18,-27,5
.P 18,-27,-5
.P 18,-18,-13
.P -18,-18,-13
.P -18,-27,-5
.P -18,-27,5
.P -2,-27,3 ;9-12 RIGHT INNER WING
.P 2,-27,3
.P 2,-27,-3
.P -2,-27,-3
.P -18,18,13 ;13-20 LEFT OUTER WING
.P 18,18,13
.P 18,27,5
.P 18,27,-5
.P 18,18,-13
.P -18,18,-13
.P -18,27,-5
.P -18,27,5
.P -2,27,3 ;21-24 LEFT INNER WING
.P 2,27,3
.P 2,27,-3
.P -2,27,-3
.P -6,-6,5 ;25-28 RIGHT BODY STRUT
.P 6,-6,5
.P 6,-6,-5
.P -6,-6,-5
.P -6,6,5 ;29-32 LEFT BODY STRUT
.P 6,6,5
.P 6,6,-5
.P -6,6,-5
.P -3,-3,8 ;33-40 RIGHT BODY FACE
.P 3,-3,8
.P 8,-8,3
.P 8,-8,-3
.P 3,-3,-8
.P -3,-3,-8
.P -8,-8,-3
.P -8,-8,3
.P -3,3,8 ;41-48 LEFT BODY FACE
.P 3,3,8
.P 8,8,3
.P 8,8,-3
.P 3,3,-8
.P -3,3,-8
.P -8,8,-3
.P -8,8,3
.P 5,-2,6 ;49-56 FRONT OUTER WINDOW
.P 5,2,6
.P 8,6,2
.P 8,6,-2
.P 5,2,-6
.P 5,-2,-6
.P 8,-6,-2
.P 8,-6,2
.WPZ
;===
.S=12. ;X WING
.WP XW
.P 0,0,0
.IF NE,0
;1-6 FRONT NOSE
.P 40,-2,-1
.P 40,2,-1
.P 40,3,-2
.P 40,2,-3
.P 40,-2,-3
.P 40,-3,-2
;7-12 MID BODY
.P 13,-5,2
.P 13,5,2
.P 13,5,-2
.P 13,4,-4
.P 13,-4,-4
.P 13,-5,-2
;13-15,60 REAR BODY
.P -20,5,2
.P -20,4,-4
.P -20,-4,-4
; .P -20,-5,2 ; 60
;16-17 CANOPY
.P 20,0,1
.P 10,0,6
;18-20 TOP RIGHT GUN
.P 20,-42,10
.P -10,-42,10
.P -26,-42,10
;21-23 TOP LEFT GUN
.P 20,42,10
.P -10,42,10
.P -26,42,10
;24-26 BOTTOM LEFT GUN
.P 20,42,-10
.P -10,42,-10
.P -26,42,-10
;27-29 BOTTOM RIGHT GUN
.P 20,-42,-10
.P -10,-42,-10
.P -26,-42,-10
;30-36 TOP RIGHT ENGINE
.P 5,-5,2
.P -24,-5,2
.P -24,-9,2
.P -25,-11,6
.P -26,-9,10
.P -26,-5,10
.P -25,-3,6
;37-43 TOP LEFT ENGINE
.P 5,5,2
.P -24,5,2
.P -24,9,2
.P -25,11,6
.P -26,9,10
.P -26,5,10
.P -25,3,6
;44-50 BOTTOM LEFT ENGINE
.P 5,5,-2
.P -24,5,-2
.P -24,9,-2
.P -25,11,-6
.P -26,9,-10
.P -26,5,-10
.P -25,3,-6
;51-57 BOTTOM RIGHT ENGINE
.P 5,-5,-2
.P -24,-5,-2
.P -24,-9,-2
.P -25,-11,-6
.P -26,-9,-10
.P -26,-5,-10
.P -25,-3,-6
;58,59 FRONT BOTTOM DEFLECTOR
.P 35,-4,-4
.P 35,4,-4
;60 REST OF REAR BODY
.P -20,-5,2 ; 60
.ENDC
.WPZ
;===
.S=12. ;Y WING
.WP YW
.P 0,0,0
.IF NE,0
;1-4 FRONT NOSE
.P 40,-3,1
.P 40,3,1
.P 40,5,-2
.P 40, -5,-2
;5-10 MID NOSE
.P 30,-10,-2
.P 30,-10,3
.P 30,10,3
.P 30,10,-2
.P 30,5,-5
.P 30,-5,-5
;11-14,31-32 REAR HEAD
.P 10,-10,3
.P 10,10,3
.P 10,10,-2
.P 10,-10,-2
; .P 10,5,-5
; .P 10,-5,-5
;15-18 FRONT OF REAR BODY
.P 10,-7,1
.P 10,7,1
.P 10,7,-1
.P 10,-7,-1
;19-24,26-29 CANOPY
.P 30,-2,3
.P 25,-5,4
.P 27,-3,7
.P 27,3,7
.P 25,5,4
.P 30,2,3
.P 0,0,0 ;***25 UNUSED
.P 11,-3,7 ; BACK CANOPY
.P 10,-5,4
.P 11,3,7
.P 10,5,4
.P 0,0,0 ;***30 UNUSED
; 31-32 REAR HEAD
.P 10,5,-5
.P 10,-5,-5
;33-34 GUNS
.P 45,5,-2
.P 45,-5,-2
;35-39 LEFT STRUT
.P 5,7,0
.P -20,13,1
.P -20,7,1
.P -20,13,-1
.P -20,7,-1
;40-46 LEFT ENGINE
.P 5,18,0
.P -29,18,7
.P -30,25,4
.P -30,25,-4
.P -29,18,-7
.P -28,11,-4
.P -28,11,4
;47-51 RIGHT STRUT
.P 5,-7,0
.P -20,-13,1
.P -20,-7,1
.P -20,-13,-1
.P -20,-7,-1
;52-58 RIGHT ENGINE
.P 5,-18,0
.P -29,-18,7
.P -30,-25,4
.P -30,-25,-4
.P -29,-18,-7
.P -28,-11,-4
.P -28,-11,4
.ENDC
.WPZ
;---
.WP GND ;GROUND LASAR TOWER
.MACRO .PGND .A,.B,.C ;OFFSET HITE TO MID OF PLAYERS HITE
.WORD .A'*.S,.B'*.S,.C'*.S-GD$MDT
.ENDM
.S=30.*4 ;TRY A BIT HIGHER AND WIDER(30==>256. WIDE)
.PGND 0,0,0 ;CENTER ON GROUND
.PGND -8,0,0 ;FRONT
.PGND 0,8,0 ;LEFT
.PGND 0,-8,0 ;RIGHT
.PGND -4,0,58 ;TOP OF TOWER, TOP OF CANNON
.PGND 0,4,58
.PGND 0,-4,58
.PGND -4,0,52 ;BOTTOM OF CANNON
.PGND 0,4,52
.PGND 0,-4,52
.PGND -5,0,14 ;MIDLINE
.PGND 0,5,14
.PGND 0,-5,14
.PGND -6,0,6 ;NEAR BOTTOM
.PGND 0,6,6
.PGND 0,-6,6
.WPZ
.WPZ2 TWR ;TOWER
.WPZ2 BNK ;BUNKER
.WPZ2 STB ;STUB OF TOWER WITHOUT BUNKER TOPTWR
;===
.WP WPN ;WALL PANEL
.S=8 ;NOTE HALF SIZE DUE TO PSUB LACK OF DIV2
.PH -20,0,-18 ;0-3 OUTER RECTANGLE
.PH -20,0,18
.PH 20,0,18
.PH 20,0,-18
.PH -10,0,-8 ;4-7 INNER RECTANGLE
.PH -10,0,8
.PH 10,0,8
.PH 10,0,-8
.WPZ
;===
.WP WGA ;WALL GUN TYPE A
.S=8 ;MATCHES WALL PANEL
.P 0,0,0
.P -32,0,24 ;0-4 WALL BASE
.P 32,0,24
.P 32,0,-24
.P -32,0,-24
.P -12,12,8 ;5-10 GUN BODY
.P 12,4,8
.P 12,4,-8
.P -12,12,-8
.P -12,4,-8
.P -12,4,8
.P -12,9,4 ;11-14 GUN NOZZLE
.P -12,7,4
.P -12,9,-4
.P -12,7,-4
.WPZ
.WPZ2 WGB
;===
.WP WFF ;WALL FORCE FIELD
.S=8 ;NOTE HALF SIZE DUE TO PSUB LACK OF DIV2
.PH -20,0,0 ;0-1 FRONT MIDLINE
.PH -20,40,0
.PH 0,0,-20 ;2-3 BOTTOM MIDLINE
.PH 0,40,-20
.PH 0,0,20 ;4-5 TOP MIDLINE
.PH 0,40,20
.WPZ
.WPZ2 WFG
;===
.WP PORT ;THERMAL EXHAUST PORT
.S=8 ;GROUND OBJECT SCALING
.PH 0C,0C,0 ;0-3 INNER CIRCLE
.PH 0C,-0C,0
.PH -0C,0C,0
.PH -0C,-0C,0
.PH 14,14,0 ;4-7 SUPPORT BERM
.PH 14,-14,0
.PH -14,14,0
.PH -14,-14,0
.PH 20,20,0 ;8-15 BASE
.PH 20,-20,0
.PH -20,20,0
.PH -20,-20,0
.WPZ
;===
.WP TW1 ;TOWER TOP EXPLOSION PIECE 1 (LEFT SIDE)
.S =3*4
.P 0,0,0
.P 5,-20,30
.P 25,0,30
.P -35,20,30
.P 5,-20,-30
.P 25,0,-30
.P -35,20,-30
.WPZ
.WP TW2 ;TOWER TOP EXPLOSION PIECW 2 (CENTER PIECE)
.S =3*4
.P 0,0,0
.P 10,-20,30
.P 30,0,30
.P 10,20,30
.P -50,0,30
.P 10,-20,-30
.P 30,0,-30
.P 10,20,-30
.P -50,0,-30
.WPZ
.WP TW3 ;TOWER EXPLOSION PIECE 3 (RIGHT SIDE)
.S =3*4
.P 0,0,0
.P 5,20,30
.P 25,0,30
.P -35,-20,30
.P 5,20,-30
.P 25,0,-30
.P -35,-20,-30
.WPZ
;===
.WP BK1 ;BUNKER EXPLOSION PIECE 1 (LEFT SIDE)
.S =3*4
.P 0,0,0
.P 22,-45,30
.P 22,5,30
.P -58,35,30
.P 22,-45,-30
.P 22,5,-30
.P -58,35,-30
.WPZ
.WP BK2 ;BUNKER EXPLOSION PIECE 2 (CENTER)
.S =3*4
.P 0,0,0
.P 28,-30,30
.P 28,30,30
.P -52,0,30
.P 28,-30,-30
.P 28,30,-30
.P -52,0,-30
.WPZ
.WP BK3 ;BUNKER EXPLOSION PIECE 3 (RIGHT SIDE)
.S =3*4
.P 0,0,0
.P 22,45,30
.P 22,-5,30
.P -58,-35,30
.P 22,45,-30
.P 22,-5,-30
.P -58,-35,-30
.WPZ
;===
.WP WG1 ;WALL GUN EXPLOSION PIECE 1 (FRONT)
.S =1
.P 0,0,0
.P -35,-35,-50
.P 45,-35,-50
.P -35,-35,110
.P -35,45,-50
.P 45,20,-50
.P -35,45,110
.WPZ
.WP WG2 ;WALL GUN EXPLOSION PIECE 2 (MIDDLE)
.S =1
.P 0,0,0
.P -90,-20,-100
.P -90,-20,60
.P -90,60,60
.P -10,35,-100
.P 70,-20,-100
.P 70,5,-100
.P 150,-20,60
.WPZ
.WP WG3 ;WALL GUN EXPLOSION PIECE 3 (RIGHT)
.S =1
.P 0,0,0
.P -25,-10,-100
.P -25,15,-100
.P 55,-10,-100
.P 55,-10,60
.WPZ
;===
TPNTZ:
T$EQ =TPNTZ-TPNT/6 ;# OF POINTS
.PAGG
J INOBJ ;INIT MBOX FOR NEW OBJECT SHAPES
LDX #BJBIC
LDA #0
10$: ;---
STA 0(X)+ ;CLEAR OUT BIC LIST
CMPX #BJBICZ
BLO 10$
;---
LDA #M$BJBC
LSRA ;PAIRS OF POINTS
STA BJ.BIC ;STARTING BIC VALUE
LDD #M.OBJ
STD BJ.RAM ;STARTING RAM ADDRESS
RTS ;---
J ADBOBJ
;ADD OBJECT POINTS TO MBOX
TEMP CNT,1
STB BJ.ID ;B:=OBJECT #
J ADOBJ
LDB BJ.ID
LDX #BJBIC
LDA B(X) ;?MISSING FROM MBOX?
BNE 90$ ;B IF ALREADY PRESENT IN MBOX
LDA BJ.BIC ;THEN START THE TRANSFER
STA B(X) ;SAVE BIC ADDRESS
LDX #TDRWNM
LDA B(X) ;# OF POINTS TO XFER
STA TMPCNT
LSRA ;PAIRS OF POINTS
ADDA BJ.BIC ;UPDATE BIC
BCC 25$ ;?TOO MANY POINTS?
SWI ;***TEST***
;FOR PROD, REPOINT FOR PSUEDO-GOOD POINTS BJBIC TO M$BJBC
25$: ;---
STA BJ.BIC ;
LDX #TDRWPC ;POINTER TO 6 BYTE ROM POINTS
LSLB ;ACCESSED BY WORDS
LDX B(X) ;X-->6 BYTE ROM
LDU BJ.RAM ;U-->8 BYTE MRAM
30$: ;---
LDD 0(X) ;X
STD 0(U)
LDD 2(X) ;Y
STD 2(U)
LDD 4(X) ;Z
STD 4(U)
LEAX 6(X) ;6 BYTE ROM
LEAU 8(U) ;8 BYTE MRAM
DEC TMPCNT ;ONE LESS POINT
BGT 30$ ;LOOP THRU THEM ALL
;---
STU BJ.RAM ;RECORD LATEST MRAM USAGE
90$: ;---
RTS
;---
.PAGG
.SBTTL OBJECT DRAW -- BJCNTR,OBJCEN,OBJPNT,OBJDRW,BJLNV/B
J BJCNTR
;EXPECTS VG AT CENTER, INFO AT QUO, YP, XP
J OBJCEN
LDD M.QUO ;AT LEAST 7.5 CYCLES AFTER M.DVD
STD M.XP
LDA #M$PERS
JSR MGOWT
LDD M.ZP
STD BJ.CY ;NEW CUNENT Y
ADDD #VGOFFY ;VIDEO CENTER OFFSET
ANDA #1F
STD (Y)++ ;Y LONG VECTOR
LDD M.YP
STD BJ.CX
ANDA #1F
STD (Y)++ ;X LONG VECTOR
RTS
;===
J BJLNV ;DRAW VISIBLE OBJECT LINE
LDD M.QUO ;AT LEAST 7.5 CYCLES AFTER M.DVD
STD M.XP
LDA #M$PERS
JSR MGOWT
LDD M.ZP
SUBD BJ.CY ;CURRENT UP/DOWN POSITION
ANDA #01F
STD (Y)++
LDD M.ZP
STD BJ.CY
;---
LDD M.YP ;LEFT/RIGHT
SUBD BJ.CX
ORA #0E0
STD (Y)++
LDD M.YP
STD BJ.CX
;---
RTS
;===
J BJLNB ;DRAW BLANK OBJECT LINE
LDD M.QUO ;AT LEAST 7.5 CYCLES AFTER M.DVD
STD M.XP
LDA #M$PERS
JSR MGOWT
LDD M.ZP
SUBD BJ.CY ;CURRENT UP/DOWN POSITION
ANDA #01F
STD (Y)++
LDD M.ZP
STD BJ.CY
;---
LDD M.YP ;LEFT/RIGHT
SUBD BJ.CX
ANDA #01F ;BLANK
STD (Y)++
LDD M.YP
STD BJ.CX
;---
RTS
;===
J OBJBPNT
TEMP CNT,1
STB BJ.ID
J OBJPNT
LDB BJ.ID ;SAVE OBJECT IDENTIFICATION
LDX #TDRWNM
LDA B(X) ;# OF POINTS
STA TMPCNT
LDX #BJBIC
LDA B(X)
BNE 5$
SWI ;***TEST***
;SET TO M$BJBC IF FAIL
5$: ;---
LSLA ;ALWAYS IN PAIRS, SHIFT UP TO 9 BITS
STA M.BICL
ROLA
STA M.BICH
;---
LDX #BJ.PNT
10$:
LDA #M$PAD
JSR MGOWT
LDD M.XP ;X
STD M.DVD
ORCC #0 ;TOTAL OF 7.5 CYCLE DELAY BEFORE READ
LDD M.QUO ;GET 1/X, RECIPROCAL
STD M.XP
LDA #M$PERS ;1/X (*Y,*Z)
JSR MGOWT
LDD M.YP
STD 0(X)
LDD M.ZP
STD 2(X)
LEAX 4(X)
DEC TMPCNT
BGT 10$
RTS
;===
J OBJDRW
LDX #TDRWLN
LDB BJ.ID ;PULL IN OBJECTS IDENTIFICATION
LSLB
LDU B(X)
LDB 0(U)+
IFNE
SWI ;OOPS, NOT AN INTERPRETABLE OBJECT
ENDIF
10$:
LDB 0(U)+
BITB #2
BEQ 18$
CMPB #0FF
BEQ 90$
LSRB
LSRB
CMPB BJ.DMC
BHI 10$ ;CONTINUE IF BACK DAMAGE
BRA 90$
18$: ;---
CLRA
BITB #3
BNE 20$
LDA #0E0 ;0 CODE HAS BRITNESS
20$: ;---
STA BJ.BRT ;PRE FORMATTED BRITNESS
ANDB #0FC ;PREPARE OFFSET
LDX #BJ.PNT ;AND BASE POINT TABLE
ABX ;ADD OFFSET TO POINT TABLE
LDD 2(X) ;Y
SUBD BJ.CY
ANDA #1F
STD (Y)++
LDD 0(X) ;X
SUBD BJ.CX
ANDA #1F
ORA BJ.BRT
STD (Y)++
LDD 0(X)
STD BJ.CX
LDD 2(X)
STD BJ.CY
BRA 10$
90$:
RTS
;===
.PAGG