Erasing Faces and Edges

This task shows you how to erase faces and edges. Closed surfaces become opened surfaces.
Open the Erasing1.CATPart document.
  1. Click Erasing .

    You can also access this command by pressing ALT+SHIFT+E.
  2. Select the face to erase.

    A Tools Palette is displayed:
    The following icons let you:
    •   apply the command. This command is active after the first selection. Clicking this command validates the selection and further executes the command.

    Erasing a Face

  3. Click Face Erasing (it is selected by default).

  4. Click the face or faces to erase.

  5. Press Ctrl to select multiple elements to erase.

  6. Release the mouse when you are satisfied with the new shape of the surface.

    The same face cannot be cut twice by the same cutting.

    Erasing an Edge


  1. Click Edge Erasing .

  2. Click the edge to erase.

    The erasing propagates to the connected edges:
  3. Release the mouse when you are satisfied with the new shape of the surface.

    Edges created using the Face Cutting command can be erased.
    • Multi-selection is not available with this command.
    • Only closed propagations or propagations up to a free edge are available.
      The following illustration shows you the kind of edges that can be erased (in green) or not (in red):

    Applying the Erase Command

  1. Click Apply to validate every face you erase or use Crtl key to multi-select the surfaces and then click Apply to erase them.

    • During the command execution the selection of elements is previewed on the surface.

    • The command is executed, only after the selection is validated by using Apply.

    • Apply is automatic applied before quitting the command.

    • When the modification is not possible, the apply button is not active (grayed out).

    • You can undo or redo the changes only after the completion of command after the Apply. Intermediate selection states cannot be managed by undo/redo.