Creating Polar Extremum Elements

You can create an element of extremum radius or angle, on a planar contour.

Before you begin: Create a 3D shape containing a sketch or a curve and a point.

  1. Click Extremum Polar in the Wireframe toolbar (Points sub-toolbar).

    The Polar Extremum Definition dialog box appears.

  2. In the Contour box, select a connex planar sketch or curve on which the extremum element is to be created.



    Warning: Non-connex elements are not allowed.

  3. In the Support box, select the supporting surface of the contour.



  4. In the Origin box, specify the axis origin and in the Reference direction box, define the direction to determine the axis system in which the extremum element is to be created.

    Important: Min angle and Max angle types.

  5. Click Preview.

    Depending on the selected computation type, the results can be:

    • Min radius: the extremum element is detected based on the shortest distance from the axis-system origin

    • Max radius: the extremum element is detected based on the longest distance from the axis-system origin

    • Min angle: the extremum element is detected based on the smallest angle from the selected direction within the axis-system

    • Max angle: the extremum element is detected based on the greatest angle from the selected direction within the axis-system

    Important: The radius or angle value is displayed in the Polar Extremum Definition dialog box for information.

  6. Click OK to create the extremum element.

    The element (identified as Polar extremum.xxx), a point in this case, is added to the specification tree.

    Important: The result of a polar extremum feature is in most cases made of one or several points. In some cases, the result can also contain also wires. If you always want a point to be created, first create the polar extremum feature then launch the Extremum command and select the polar extremum feature. Here is an example (Extremum polar feature in blue and extremum feature in pink) :