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发表于 2019-4-28 19:00:12
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Animate[Graphics[{PointSize[Large], Circle[{0, 0}, 4/\[Pi]],
Circle[{(4 Cos[t])/\[Pi], (4 Sin[t])/\[Pi]}, 4/(3 \[Pi])],
Circle[{(4 Cos[t])/\[Pi] + (4 Cos[3 t])/(3 \[Pi]), (
4 Sin[t])/\[Pi] + (4 Sin[3 t])/(3 \[Pi])}, 4/(5 \[Pi])],
Circle[{(4 Cos[t])/\[Pi] + (4 Cos[3 t])/(3 \[Pi]) + (4 Cos[5 t])/(
5 \[Pi]), (4 Sin[t])/\[Pi] + (4 Sin[3 t])/(3 \[Pi]) + (
4 Sin[5 t])/(5 \[Pi])}, 4/(7 \[Pi])],
Point[{{(4 Cos[t])/\[Pi], (
4 Sin[t])/\[Pi]}, {(4 Cos[t])/\[Pi] + (4 Cos[3 t])/(3 \[Pi]), (
4 Sin[t])/\[Pi] + (4 Sin[3 t])/(3 \[Pi])}, {(
4 Cos[t])/\[Pi] + (4 Cos[3 t])/(3 \[Pi]) + (4 Cos[5 t])/(
5 \[Pi]), (4 Sin[t])/\[Pi] + (4 Sin[3 t])/(3 \[Pi]) + (
4 Sin[5 t])/(5 \[Pi])}, {(4 Cos[t])/\[Pi] + (4 Cos[3 t])/(
3 \[Pi]) + (4 Cos[5 t])/(5 \[Pi]) + (4 Cos[7 t])/(7 \[Pi]), (
4 Sin[t])/\[Pi] + (4 Sin[3 t])/(3 \[Pi]) + (4 Sin[5 t])/(
5 \[Pi]) + (4 Sin[7 t])/(7 \[Pi])}}], Green,
Point[Table[{3 + k, (4 Sin[-k + t])/\[Pi] + (4 Sin[3 (-k + t)])/(
3 \[Pi]) + (4 Sin[5 (-k + t)])/(5 \[Pi]) + (
4 Sin[7 ( -k + t)])/(7 \[Pi])}, {k, 0, 6, .05}]], Red,
Arrowheads[Medium],
Arrow[{{(4 Cos[t])/\[Pi] + (4 Cos[3 t])/(3 \[Pi]) + (4 Cos[5 t])/(
5 \[Pi]) + (4 Cos[7 t])/(7 \[Pi]), (4 Sin[t])/\[Pi] + (
4 Sin[3 t])/(3 \[Pi]) + (4 Sin[5 t])/(5 \[Pi]) + (4 Sin[7 t])/(
7 \[Pi])}, {3 + 0, (4 Sin[t])/\[Pi] + (4 Sin[3 t])/(
3 \[Pi]) + (4 Sin[5 t])/(5 \[Pi]) + (4 Sin[7 t])/(7 \[Pi])}}],
Blue, Line[{{0, 0}, {(4 Cos[t])/\[Pi], (
4 Sin[t])/\[Pi]}, {(4 Cos[t])/\[Pi] + (4 Cos[3 t])/(3 \[Pi]), (
4 Sin[t])/\[Pi] + (4 Sin[3 t])/(3 \[Pi])}, {(
4 Cos[t])/\[Pi] + (4 Cos[3 t])/(3 \[Pi]) + (4 Cos[5 t])/(
5 \[Pi]), (4 Sin[t])/\[Pi] + (4 Sin[3 t])/(3 \[Pi]) + (
4 Sin[5 t])/(5 \[Pi])}, {(4 Cos[t])/\[Pi] + (4 Cos[3 t])/(
3 \[Pi]) + (4 Cos[5 t])/(5 \[Pi]) + (4 Cos[7 t])/(7 \[Pi]), (
4 Sin[t])/\[Pi] + (4 Sin[3 t])/(3 \[Pi]) + (4 Sin[5 t])/(
5 \[Pi]) + (4 Sin[7 t])/(7 \[Pi])}}]},
PlotRange -> {{-2.5, 10}, {-2.5`, 2.5`}}, ImageSize -> Full], {t, 0,
6 \[Pi]}, AnimationRate -> .1, AnimationRunning -> False,
ContentSize -> {900, 320}] |
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