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Commodore BASIC  |  1987-08-05  |  862 b   |  32 lines
  1. 1 A=USR(32),0:GOTO16
  2. 2 GETA$:IFA$=""THEN10
  3. 3 IFA$>"/"ANDA$<":"THENSF=VAL(A$)-SS*(A$="0"):GOTO10
  4. 4 IFA$="[147]"THENSYS36888:GOTO10
  5. 5 IFA$="!"THENSYS36867:GOTO10
  6. 6 IFA$="="THENSYS36882:GOTO10
  7. 7 IFA$="&"THENSYS36879:GOTO10
  8. 8 IFA$=""THENSYS36885:GOTO10
  9. 9 A=USR(33),0:LOAD"CMND",D0
  10. 10 X=X+USR(121)*SF:Y=Y-USR(122)*SF
  11. 11 IFX>331THENX=331
  12. 12 IFX<12THENX=12
  13. 13 IFY>239THENY=239
  14. 14 IFY<40THENY=40
  15. 15 A=USR(34),X,Y,0:A=USR(34),16,Y,6:A=USR(34),X,231,7:RETURN
  16. 16 GOSUB2:A=USR(117):IFA<>16THEN16
  17. 17 SYS36864:X1=X-12:Y1=Y-40:A=USR(34),X,Y,1:A=USR(32),1
  18. 18 A=USR(117):IFA<>0THEN18
  19. 19 GOSUB2:A=USR(117):IFA<>16THEN19
  20. 20 X2=X-12:Y2=Y-40:A=USR(34),X,Y,2:A=USR(32),2
  21. 21 A=USR(117):IFA<>0THEN21
  22. 22 A=USR(33),1:A=USR(33),2:IFX1=X2THENIFY1=Y2THEN31
  23. 23 RADIUS=(SQR((X1-X2)^2+(Y1-Y2)^2))/2
  24. 24 X4=X1-(X1-X2)/2:Y4=Y1-(Y1-Y2)/2:A=USR(33),0
  25. 25 FORPHI=0TO(null)STEP(null)/100
  26. 26 X3=(COS(PHI)*RA)+X4+.5:Y3=(SIN(PHI)*RA*.85)+.5:Y1=Y4+Y3:Y2=Y4-Y3
  27. 27 IF(X3>320)OR(X3<0)THEN31
  28. 28 IFY1>199THENY1=199
  29. 29 IFY2<0THENY2=0
  30. 30 A=USR(67),X3,Y1,X3,Y2
  31. 31 NEXT:GOTO1
  32.