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<center><h1>
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<center><h1>
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Logotip stre¾nika WIMS
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Logotip stre¾nika WIMS
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</h1>
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</h1>
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<p>
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<p>
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<img src="gifs/logo-160.gif" align=middle alt="logo">
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<img src="gifs/logo-160.gif" align="middle" alt="logo">
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</center>
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</center>
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<p>
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<p>
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The curve represents the trace of a point on a disk of radius 1 rotating
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The curve represents the trace of a point on a disk of radius 1 rotating
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inside a fixed circle of radius 3. And the deformation of the curve
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inside a fixed circle of radius 3. And the deformation of the curve
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represents what happens when the distance of the point towards the center of
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represents what happens when the distance of the point towards the center of
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<pre>
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<pre>
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     x=(1-s)*cos(t+pi*s)+s*cos(2*t)
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     x=(1-s)*cos(t+pi*s)+s*cos(2*t)
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     y=(1-s)*sin(t+pi*s)-s*sin(2*t)
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     y=(1-s)*sin(t+pi*s)-s*sin(2*t)
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</pre>
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</pre>
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  (where s is the ``sequentiel parameter'' as defined in
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  (where s is the ``sequentiel parameter'' as defined in
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  <font color=red>Tracés animés</font>.)
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  <font color="red">Tracés animés</font>.)
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<li>Ranges of variables:
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<li>Ranges of variables:
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<pre>
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<pre>
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     -1&lt;x&lt;1, -1&lt;y&lt;1, 0&lt;t&lt;2*pi.
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     -1&lt;x&lt;1, -1&lt;y&lt;1, 0&lt;t&lt;2*pi.
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</pre>
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</pre>
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</ul>
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</ul>
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You may
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You may
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!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
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!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
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 into the menu of <font color=red>Tracés animés</font>
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 into the menu of <font color="red">Tracés animés</font>
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to plot it yourself.
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to plot it yourself.
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<p>
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<p>
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Date of creation 03-27-1998, &copy; XIAO, Gang.
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Date of creation 03-27-1998, &copy; XIAO, Gang.
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<p><hr> <p>
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<p><hr> <p>
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<center>
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<center>