Subversion Repositories wimsdev

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Logotip stre¾nika WIMS

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<img src="gifs/logo-160.gif" align=center alt="logo">

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The curve represents the trace of a point on a disk of radius 1 rotating

inside a fixed circle of radius 3. And the deformation of the curve

represents what happens when the distance of the point towards the center of

the moving disk varies from 0 to infinity.

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This animated logo is created by the application 

!href module=tool/geometry/animtrace Tracés animés

 under Wims.

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<ul>

<li>Type of plotting: parametric curve in 2D.

<li>Equations:

<pre>

     x=(1-s)*cos(t+pi*s)+s*cos(2*t)

     y=(1-s)*sin(t+pi*s)-s*sin(2*t)

</pre>

  (where s is the ``sequentiel parameter'' as defined in 

  <font color=red>Tracés animés</font>.)

<li>Ranges of variables:

<pre>

     -1<x<1, -1<y<1, 0<t<2*pi.

</pre>

</ul>

You may

!href module=tool/geometry/animtrace.en&cmd=new&type=parametric2D&x1=(1-s)*cos(t+pi*s)+s*cos(2*t)&y1=(1-s)*sin(t+pi*s)-s*sin(2*t)&tleft=0&tright=2*pi&xleft=-1&xright=1&yleft=-1&yright=1&special_parm=noshow load directly these settings

 into the menu of <font color=red>Tracés animés</font>

to plot it yourself.

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Date of creation 03-27-1998, © XIAO, Gang.

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