Interoperable interactive geometry for Europe
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free_point(P) states that point P can be moved freely with the mouse.

Although the free_point and free_line constraints may seem unnecessary, if no constraint is used the behaviour of the element is unspecified. They are also useful in writing the file and in doing tolopological sort, so please use them.


  1. Test Case 1 (points): source (this link may not work, should be updated when a final location for the tests is decided)
  2. Free point example: source JSXGraph