Shape propagation applies to open profiles. The result of the operation contextually depends on the extension of the ends of the profile and the shape of extant extrusions. Use the Extrude or Revolve command to propagate a Match Contour or Match Shape. The side you select to keep determines the result.
- Match Contour
- In Extrude, with Match Shape unselected, the profile completes using the face which it intersects, and the extrusion generated from that profile.
- Match Shape
- Available in the Revolve and Extrude dialog box, upon selection of an open profile sketch, such as the sketch on the following part.
With Match Shape selected, the face that it intersects completes the profile. The extrusion flood fills to that face (or faces) as it extrudes, like a To Next termination.
- Revolve
- With Match Shape selected, a flood-fill type solution is also created. The open ends of the profile extend to the axis of revolution, if possible, or to the bounding box of the body.
- Extrude
- With Match Shape not selected, the face that it intersects completes the profile. The extrusion generates from that profile.
With Match Shape selected, in the Extrude dialog box, a flood-fill type solution is created. The open ends of the profile extend to a co-edge or face. The required faces quilt together to form a complete intersection with the extruded body.
The side you select to keep determines the result.
- Match Contour
- Closes the open profile, through profile extension, to the body. The operation takes place as if you specified a closed profile.
- Revolve
- With Match Shape disabled, the open profile closes by extending the open ends of the profile until they intersect the solid body. If the sketch plane of the profile lies on a planar face, the loops of the face close the profile. Otherwise, the intersection of the profile plane with the body defines the edges to close the profile.
- Extrude
- With Match Shape unselected, the profile completes by the face that it intersects. The extrusion generates from that profile. Extension rules for closing the profile:
- The initial sketch plane is offset from the top surface of the base of this part.
- The original profile lines (green) extend (red-dashed) to the face elements.
- The loop closes by utilizing the intersection lines of the sketch plane and the solid body (purple)
- It is required to specify the side to keep.
- Extrude performs. The result is a normal closed loop extrusion.
