Edit Trim/Extend Curves with Limits

The Trim/Extend Curves with Limits command trims or extends selected entities ( Curves, obviously including lines and arcs) using the type of limits selected in the Boundaries drop-down list.

Points

To trim the portion of the selected entities that extend beyond two specified limit points, or to extend the selected entities to the limit points. The trim points are determined by projecting the specified positions onto the view plane.

Entities

To trim the portion of the selected entities that extend beyond two specified limit entities (lines, arcs, curves, solid edges), or to the extend selected entities to the limit entities.   Importance of selection points In case of multiple intersections between the boundaries and the curve to be modified, the results you will obtain depend on the positions at which you click to select them: The actual intersection point that will be taken into account is the one closest to the selection point of the boundary. The selection point of the curve defines the part of it that will be retained (that is: not removed or extended). See details in "Importance of selection points in the Entities mode of Trim/Extend Curves with Limits".

Once you have chosen the type of limits, select the points or the entities (lines, arcs, curves, solid edges) to be used as limits. To change them, right-click on Boundaries, select Reset in the context menu and perform selection again.

Then select the curves to be trimmed. To change them, right-click on Curves, select Reset in the context menu and perform selection again.

The Associative Mode is available in the selection list. It enables you to create curves which retain a link to the surfaces/curves they derive from.

• When the check box is selected, the resulting curves will be associative. The new curve will retain a link to the entities it derives from. A specific node displaying both the original entities and the resulting associative curve will be added to the Model Structure.
• When the check box is cleared, the resulting curves will not be associative.

When associativity is set, a preview of the command result is displayed:

If you select just one boundary and the selected boundary does not lie on the same plane as the curves to be trimmed, you will be required to confirm that the trimming be performed using the virtual intersections along the view direction. In this case, if you rotate the view before applying the command, the Update Intersections button ( ) is displayed on top of the selection list. If you click it, the virtual intersections will be updated according to the new view direction and also the preview will change accordingly.