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45 lines
1.1 KiB
QBasic
45 lines
1.1 KiB
QBasic
10 gosub 50000:goto 100
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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)=15:ds(i)=dc:return
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100 hgr:vtab 21
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110 hcolor=6:hplot 0,13 to 279,13
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120 hcolor=3
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130 x=140:sd=0:s=sh
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140 di=0:mm=3:dim dx(mm),dy(mm),ds(mm),ox(mm),oy(mm),os(mm)
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150 for i=1 to mm:dx(i)=0:dy(i)=0:ds(i)=0:next i
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200 xdraw s at x,10:ox=x:os=s
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210 for i=1 to mm
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220 ox(i)=dx(i):oy(i)=dy(i):os(i)=ds(i)
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230 if dx(i) then xdraw ds(i) at dx(i),dy(i)
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240 next i
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300 ky=peek(-16384):if ky < 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 then gosub 20
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400 x=x+sd
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410 if x < 10 then x=10
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420 if x > 270 then x=270
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500 di=di+1:if di > mm then di = 1
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510 if not dx(di) then 600
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520 ds(di)=ds(di)+1:if ds(di) > dc+3 then ds(di)=dc
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530 dy(di)=dy(di)+2:if dy(di) > 160 then dx(di)=0:dy(di)=0:ds(di)=0
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600 xdraw os at ox,10
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610 for i=1 to mm
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620 if ox(i) then xdraw os(i) at ox(i),oy(i)
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630 next i
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640 goto 200
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49999 end
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50000 $shape src="ships.st", poke=yes, init=yes, assign=(sb="sub-left", sh="ship-left", dc="depthcharge-1")
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