For a challenge, we create a curve. To do this we generate the curve as the set of (cos(t),sin(t)), when t runs from 0 to 360°.

 
  • Right click on the circle.
  • The circle is not a geometric circle, but a parametric curve
  • Study the entries in the parameter dialog.
  • Change the x-coordinate to "cos(3*t)" and the y-coordinate to "sin(2*t)" to get a nice curve.

If you enter wrong values, you can get an invisible or invalid function. To edit the most recent function, click on the edit tool with the cntrl-key. This will edit the most recent object. In the C.a.R. application, you could call a list of objects and select the invalid function from this list.

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