Trimming Ribs or Slots

This page illustrates two different cases of ribs obtained from open profiles, then the use of the Merge rib's ends and Merge Ends options available in the Rib Definition dialog box.
  • Open Profiles Trimmed by Existing Material



Initial Profile (in black) and Center Curve (in red)

Resulting Rib

The rib is obtained just by extending its open profile onto existing material.

  • Open Profiles with No Trimming Material


If the rib cannot be trimmed by existing material, the only way of obtaining a rib is by using the Thick Profile option:

To create this, thickness has been added to each side of the profile



Resulting Rib

  • Merge rib's ends Option

The Merge rib' ends option trims each extremity of the rib to existing material, starting from the profile position until the first limit encountered on existing material in each direction.

In the following example, the blue rib is created using Merge rib's ends. The profile (a red circle) swept along the green center curve is trimmed on each direction to the first faces encountered.


Without using the Merge rib's ends option Using the Merge  rib's ends option
  • Merge Ends Option

  The Merge Ends option is to be used for thin ribs (or slots). It trims a set of profiles to themselves while trimming them to existing material too.

If you consider this initial sketch composed of two curves :

  Without using the Merge Ends option, you obtain this result:

  Using the Merge Ends option, you obtain this result: