2 REM ****** TRY THESE ******* 3 REM (20,5,10),(20,5,-10) 4 REM (20,5,5),(20,5,-5) 5 MODE 4 10 VDU30 12 INPUT"FIXED RADIUS";f 13 VDU30 16 INPUT"ROTATING RADIUS";m 18 VDU30:PRINT STRING$(30," "):VDU30 20 INPUT"PLOT RADIUS ";r 22 VDU30 25 F$="Y":INPUT"PLOT FIXED COG Y/N";F $ 26 VDU30:PRINT STRING$(30," "):VDU30 28 PRINT TAB(0,31)STR$(f);",";STR$(m) ;",";STR$(r);" "; 29 VDU13 30 a=512:b=640 60 t=ABS(m) MOD ABS(f) 70 d=ABS(r*(1+f/m))+ABS(f+m) 80 s=INT(-2*PI*d) 85 IF t=0 THEN t=m 90 c=ABS(s*(m/t)) 100 i=-2*PI/s 102 PLOT69,b,a 105 zx=f/m*2 110 angle=0 115 REPEAT 120 angle=angle+i 130 Ca=(f+m)*COS(angle) 140 Sa=(f+m)*SIN(angle) 160 rot=angle*zx 170 Cb=r*COS(rot) 180 Sb=r*SIN(rot) 310 X=INT(b+(Ca*10)+(Cb*10)) 320 Y=INT(a+(Sa*8)+(Sb*8)) 330 PLOT69,X,Y 332 IF F$="N" THEN GOTO 340 335 PLOT69,SIN(angle)*f*10+b,COS(angle )*f*8+a 340 c=c-1 345 UNTIL c=0 350 GOTO 10