Restructured source code: long variable names, multi-line, a bit of
commenting.
This commit is contained in:
Rob Greene
parent
9078361a18
commit
4c779f45e9
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@ -1,76 +1,187 @@
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10 gosub 50000:mm=5:dim dx(mm),dy(mm),ds(mm),ox(mm),oy(mm),os(mm):goto 1000
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' One-time initializations
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10 gosub 50000: \
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chargemax=5: \
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dim chargex(chargemax),chargey(chargemax),chargeshape(chargemax),\
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priorchargex(chargemax),priorchargey(chargemax),priorchargeshape(chargemax): \
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ch=36:cv=37: \
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charwidth=7:charheight=8: \
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space=asc(" "):rubshape=95+charbase: \
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waterline=40:shipy=waterline-3:chargestarty=waterline+2: \
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goto 1000
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20 for i=1 to mm:if dx(i) then next i:return
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30 dx(i)=x:dy(i)=wc:ds(i)=dc:qd=qd-1:gosub 40:vtab 3:htab 37:qq=qd:return
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' Search list of depth charges for open slot; if found, queue up the next depth charge!
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20 for i=1 to chargemax: \
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if chargex(i) then next i:return
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30 chargex(i)=shipx: \
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chargey(i)=chargestarty: \
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chargeshape(i)=constdepthchargeshape: \
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remainingcharges=remainingcharges-1: \
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gosub 40: \
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vtab 3:htab 37:qq=remainingcharges: \
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return
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40 a$="0000"+str$(qq):a$=mid$(a$,len(a$)-3)
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50 ly=peek(cv)*lh:lx=peek(ch)*lw
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60 for c=1 to len(a$):ls=cb+asc(mid$(a$,c,1))-sp:draw ru at lx,ly:xdraw ls at lx,ly:lx=lx+lw:next c:return
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' Display number in QQ zero-padded to 4 digits
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40 a$="0000"+str$(qq): \
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a$=mid$(a$,len(a$)-3)
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90 vtab 1:htab 37:qq=qh:gosub 40:vtab 2:qq=qs:gosub 40:vtab 3:qq=qd:gosub 40:return
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' Display string at current HTAB,VTAB location. Note the erase done with the rub character; assumption is color is black!
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50 ly=peek(cv)*charheight: \
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lx=peek(ch)*charwidth
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60 for c=1 to len(a$): \
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ls=charbase+asc(mid$(a$,c,1))-space: \
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draw rubshape at lx,ly: \
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xdraw ls at lx,ly: \
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lx=lx+charwidth: \
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next c: \
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return
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100 x=140:sd=0:s=sh:qs=0:qd=30:di=1
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120 for i=1 to mm:dx(i)=0:dy(i)=0:ds(i)=0:next i
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130 bs=0:bx=0:by=0:bd=0
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140 xs=0:xx=0:xy=0
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' Update ALL states on the screen
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90 vtab 1:htab 37:qq=hiscore:gosub 40: \
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vtab 2:qq=score:gosub 40: \
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vtab 3:qq=remainingcharges:gosub 40: \
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return
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' Game initialization
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100 shipx=140:shipdirection=0:shipshape=constdestroyershape: \
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score=0:remainingcharges=30:chargeindex=1
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120 for i=1 to chargemax: \
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chargex(i)=0: \
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chargey(i)=0: \
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chargeshape(i)=0: \
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next i
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130 subshape=0:subx=0:suby=0:subdirection=0
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140 explosionshape=0:explosionx=0:explosiony=0
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150 gosub 90
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200 xdraw s at x,ws:ox=x:os=s
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210 if bx then xdraw bs at bx,by:cs=bs:cx=bx:cy=by
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220 ox(di)=dx(di):oy(di)=dy(di):os(di)=ds(di)
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230 if dx(di) then xdraw ds(di) at dx(di),dy(di)
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240 if xx then xdraw xs at xx,xy:zs=xs:zx=xx:zy=xy
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' Draw all active shapes (based on X coordinate)
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200 xdraw shipshape at shipx,shipy: \
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oldshipx=shipx:oldshipshape=shipshape
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210 if subx then \
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xdraw subshape at subx,suby: \
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oldsubshape=subshape:oldsubx=subx:oldsuby=suby
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220 priorchargex(chargeindex)=chargex(chargeindex): \
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priorchargey(chargeindex)=chargey(chargeindex): \
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priorchargeshape(chargeindex)=chargeshape(chargeindex)
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230 if chargex(chargeindex) then \
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xdraw chargeshape(chargeindex) at chargex(chargeindex),chargey(chargeindex)
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240 if explosionx then \
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xdraw explosionshape at explosionx,explosiony:zs=explosionshape:zx=explosionx:zy=explosiony
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300 ky=peek(-16384):if ky < 128 then 400
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' Handle keyboard
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300 keypress=peek(-16384): \
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if keypress < 128 then 400
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310 poke -16368,0
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320 if ky=136 then s=sh:sd=sd-1
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330 if ky=149 then s=sh+1:sd=sd+1
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340 if sd > 3 then sd=3
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350 if sd < -3 then sd=-3
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360 if ky=160 and qd > 0 then gosub 20
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320 if keypress=136 then \
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shipshape=constdestroyershape: \
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shipdirection=shipdirection-1
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330 if keypress=149 then \
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shipshape=constdestroyershape+1: \
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shipdirection=shipdirection+1
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340 if shipdirection > 3 then shipdirection=3
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350 if shipdirection < -3 then shipdirection=-3
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360 if keypress=160 and remainingcharges > 0 then gosub 20
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400 if not bx then 450
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410 bx=bx+bd
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420 if bx < 10 or bx > 270 then bs=0:bx=0:by=0:bd=0
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' Submarine. Only one at a time. If it doesn't exist, pick a random number to see if one shows up!
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400 if not subx then 450
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410 subx=subx+subdirection
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420 if subx < 10 or subx > 270 then subshape=0:subx=0:suby=0:subdirection=0
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430 goto 500
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' Test for a new sub
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450 rr=rnd(1):if rr < 0.10 then 480
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460 if rr > 0.20 then 500
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470 bx=10:by=wl+10+rnd(1)*80:bd=2:bs=sb+1:goto 500
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480 bx=270:by=wl+10+rnd(1)*80:bd=-2:bs=sb
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470 subx=10:suby=waterline+10+rnd(1)*80:subdirection=2:subshape=constsubshape+1:goto 500
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480 subx=270:suby=waterline+10+rnd(1)*80:subdirection=-2:subshape=constsubshape
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500 x=x+sd
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510 if x < 10 then x=10
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520 if x > 270 then x=270
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' Move the destroyer/ship
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500 shipx=shipx+shipdirection
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510 if shipx < 10 then shipx=10
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520 if shipx > 270 then shipx=270
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550 if xs then xs=xs+2:if xs >= sh then xx=0
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' Make the explosion all explody
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550 if explosionshape then explosionshape=explosionshape+2:if explosionshape >= constdestroyershape then explosionx=0
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600 if not dx(di) then 690
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610 ds(di)=ds(di)+1:if ds(di) > dc+3 then ds(di)=dc
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620 dy(di)=dy(di)+5:if dy(di) > 155 then dx(di)=0:dy(di)=0:ds(di)=0
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690 di=di+1:if di > mm then di = 1
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' Move one of the depth charges
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600 if not chargex(chargeindex) then 690
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610 chargeshape(chargeindex)=chargeshape(chargeindex)+1: \
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if chargeshape(chargeindex) > constdepthchargeshape+3 then \
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chargeshape(chargeindex)=constdepthchargeshape
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620 chargey(chargeindex)=chargey(chargeindex)+5: \
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if chargey(chargeindex) > 155 then \
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chargex(chargeindex)=0: \
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chargey(chargeindex)=0: \
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chargeshape(chargeindex)=0
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' Setup for next depth charge
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690 chargeindex=chargeindex+1: \
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if chargeindex > chargemax then \
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chargeindex = 1
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700 if ox(di) then xdraw os(di) at ox(di),oy(di):if peek(234) then dx(di)=0:dy(di)=0:ds(di)=0
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710 if cx then xdraw cs at cx,cy:a=cx:cx=0:if peek(234) then xs=cs+2:xx=a:xy=cy:bx=0:qs=qs+1:qd=qd+5:vtab 2:htab 37:qq=qs:gosub 40:vtab 3:qq=qd:gosub 40
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720 if zx then xdraw zs at zx,xy:zx=0
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730 xdraw os at ox,ws
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740 if qd > 0 then 200
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' Erase shapes
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700 if priorchargex(chargeindex) then \
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xdraw priorchargeshape(chargeindex) at priorchargex(chargeindex),priorchargey(chargeindex): \
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if peek(234) then \
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chargex(chargeindex)=0: \
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chargey(chargeindex)=0: \
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chargeshape(chargeindex)=0
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710 if oldsubx then \
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xdraw oldsubshape at oldsubx,oldsuby: \
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a=oldsubx:oldsubx=0: \
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if peek(234) then \
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explosionshape=oldsubshape+2: \
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explosionx=a: \
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explosiony=oldsuby: \
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subx=0: \
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score=score+1: \
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remainingcharges=remainingcharges+5: \
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vtab 2:htab 37:qq=score:gosub 40: \
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vtab 3:qq=remainingcharges:gosub 40
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720 if zx then xdraw zs at zx,explosiony:zx=0
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730 xdraw oldshipshape at oldshipx,shipy
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740 if remainingcharges > 0 then 200
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800 if qs > qh then qh = qs
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' Stupidly, once we run out of charges, we immediately end the game :-/
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1000 hgr:poke -16302,0:ch=36:cv=37:lw=7:lh=8:sp=asc(" "):wl=40:ws=wl-3:wc=wl+2:ru=95+cb
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1010 hcolor=0:vtab 1:htab 1:a$="Destroyer!":gosub 50
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' Check if a high score was set ...
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800 if score > hiscore then hiscore = score
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' Display the title screen!
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1000 hgr:poke -16302,0
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1010 hcolor=0: \
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vtab 1:htab 1:a$="Destroyer!":gosub 50
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1020 vtab 22:htab 4:a$="| Left, } Right, Spacebar to fire":gosub 50
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1030 vtab 1:htab 28:a$="Hiscore:":gosub 50:vtab 2:a$="Score:":gosub 50:vtab 3:a$="Charges:":gosub 50:gosub 90
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1050 hcolor=6:hplot 0,wl to 279,wl:hplot 0,159 to 279,159:hcolor=0
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1060 ly=wl+15:xdraw sh at 45,ly+3:a$="Your destroyer":lx=70:gosub 60
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1070 ly=ly+10:xdraw sb at 45,ly+3:a$="Enemy submarine (1 point)":lx=70:gosub 60
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1080 ly=ly+10:lx=40:for s=dc to dc+3:xdraw s at lx,ly+3:lx=lx+5:next s:a$="Depth charges (hit = +5!)":lx=70:gosub 60
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1090 ly=ly+20:lx=40:a$="Demo code for 'bastools'":gosub 60
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1100 ly=ly+10:lx=40:a$="Visit applecommander.github.io":gosub 60
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1110 ly=ly+20:lx=40:a$="PRESS ANY KEY TO BEGIN!":gosub 60
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1050 hcolor=6: \
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hplot 0,waterline to 279,waterline: \
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hplot 0,159 to 279,159:hcolor=0
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1060 ly=waterline+15: \
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xdraw constdestroyershape at 45,ly+3: \
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a$="Your destroyer":lx=70:gosub 60
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1070 ly=ly+10: \
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xdraw constsubshape at 45,ly+3: \
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a$="Enemy submarine (1 point)":lx=70:gosub 60
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1080 ly=ly+10:lx=40: \
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for s=constdepthchargeshape to constdepthchargeshape+3: \
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xdraw s at lx,ly+3: \
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lx=lx+5: \
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next s: \
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a$="Depth charges (hit = +5!)":lx=70:gosub 60
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1090 ly=ly+20:lx=40: \
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a$="Demo code for 'bastools'":gosub 60
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1100 ly=ly+10:lx=40: \
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a$="Visit applecommander.github.io":gosub 60
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1110 ly=ly+20:lx=40: \
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a$="PRESS ANY KEY TO BEGIN!":gosub 60
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1120 if peek(-16384)<128 then 1120
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1130 poke -16368,0
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1140 hcolor=0:for y=wl+15 to 150:hplot 0,y to 279,y:next y
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1150 goto 100
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1140 hcolor=0: \
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for y=waterline+15 to 150: \
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hplot 0,y to 279,y: \
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next y
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1150 goto 100
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50000 $shape src="destroyer.st", poke=yes, init=yes, assign=(sb="sub-left", sh="ship-left", dc="depthcharge-1", cb="characters")
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50000 $shape src="destroyer.st", \
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poke=yes, \
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init=yes, \
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assign=(constsubshape="sub-left", \
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constdestroyershape="ship-left", \
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constdepthchargeshape="depthcharge-1", \
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charbase="characters")
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