Projecting 3D Silhouette Edges  

This task shows how to create silhouette edges to be used in sketches as geometry or reference elements.
Open the Silhouette_Edge.CATPart document.

  1. Select Plane1 and go into Sketcher workbench.

  2. Select Shaft.x in the specification tree to create the silhouette edges onto the plane.

  1. Click Project 3D Silhouette Edges from the Operation toolbar (3D Geometry sub-toolbar).
 
The silhouette edges are created onto the sketch plane.

These silhouette edges are yellow if they are associative with the 3D.

You cannot move or modify the silhouette edges. You cannot delete one trace of the silhouette edges independently from the other. 
The silhouette command generates one or two marks (edges) if one mark is made of more that one curves. If those curves do not have the same geometrical support, the resulting silhouette edges will not be associative (as for Projection/Intersection commands).

  • Silhouette edges are associative except in the case of a multiple distinct marks.
  • A mark composed of several associated elements is managed as a single curve (you can constrain it).
  • If you apply the Parents/Children... command to a sketch containing a 3D silhouette, the Parents command shows the last solid feature that modified the silhouette. To see an example of this, refer to Parents/Children paragraph of Projecting 3D Elements onto the Sketch Plane.