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63 lines
1.4 KiB
QBasic
63 lines
1.4 KiB
QBasic
CLS
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SCREEN 12
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LET pi = 3.14159
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DO
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'ANGLE increase
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FOR v = 0 TO 2 * pi STEP .008
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LET v3 = v3 + .003
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LET v4 = v4 + .01
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IF v3 >= 2 * pi THEN
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LET v3 = .003
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END IF
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IF v4 >= 2 * pi THEN
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LET v4 = .01
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END IF
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'CALCULATE
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'COS is for X
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'SIN is for Y
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'Multiplier is for SIZE and
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'addition is for OFFSET.
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'Combine two equations with offset to
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'get double rotation!
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LET x = COS(v3) * 180 + (COS(v) * -20 + 320)
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LET y = SIN(v3) * 180 + (SIN(v) * -20 + 240)
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LET x2 = COS(v3) * 180 + (COS(v) * 20 + 320)
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LET y2 = SIN(v3) * 180 + (SIN(v) * 20 + 240)
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LET x3 = COS(v3) * 180 + (COS(v) * 0 + 320)
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LET y3 = SIN(v3) * 180 + (SIN(v) * 0 + 240)
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LET x4 = COS(v) * 20 + 320
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LET y4 = SIN(v) * 20 + 240
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LET x5 = COS(v4) * 80 + 320
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LET y5 = SIN(v4) * 80 + 240
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'DRAW
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LINE (x, y)-(x2, y2), 15
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CIRCLE (x3, y3), 20, 15
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CIRCLE (x4, y4), 40, 15
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CIRCLE (x5, y5), 10, 15
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'WAIT and key press=exit
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LET key$ = INKEY$
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FOR v2 = 1 TO 10000
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IF key$ <> "" THEN
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END
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END IF
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NEXT v2
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'ERASE
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LINE (x, y)-(x2, y2), 0
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CIRCLE (x3, y3), 20, 0
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CIRCLE (x4, y4), 40, 0
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CIRCLE (x5, y5), 10, 0
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NEXT v
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LOOP
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