Selecting Multiple Surfaces  

This task shows you how to select multiple surfaces and perform modification. This task deals with:

Open the MultiSelection.CATPart document.

  1. Click Modification in the Modification toolbar.

  2. Select Subdivision Surface.1.

  3. Click Multi-Selection .

    You can also access this command by pressing CTRL+SPACE.

  4. Press Crtl key and select Subdivision Surface.3.

  5. Click Multi Selection and you are back to Modification command.
  • In case of multiple selection of subdivision surfaces, each subdivision mesh is displayed in a different color for easier identification.
  • To display the meshes in same default color, clear the check box Automatic colored in Multi-Selection Mode in Tools > Options > Shape > Imagine & Shape > Display tab. The default color is as specified in Tools > Options > General > Display > Visualization  tab, Color area.
  • There is no set rule for the order of colors to be displayed. If you deselect or reselect a subdivision, its color may change.
  • Selected elements are displayed in red color and the pre-selected elements in orange as the previous behavior and these colors are kept for the elements in all the meshes.
 

Modification of Multiple Surfaces
 

  1. Select the faces on these two subdivision surfaces. You can use the Ctrl key to multi-select the faces. You can add, remove and change the selected faces.

    The All Elements Selection will select all the faces of the two subdivision surface.

  2. Click Translation .

  3. Move the mouse cursor to highlight the desired axis or plane.

  4. Hold down the left-mouse button and drag to translate the surfaces.

  5. Release the left-mouse button when you are satisfied with the new position of the surfaces.

 
 

Use One Subdivision Surface to Modify Another
 

  1. Click Compass Definition to define the compass' position on Subdivision Surface.3.

  2. Click Compass Definition again.

  3. Click Alignment .

  4. Select the multiple edges or vertices on Subdivision Surface.1 to align them on Subdivision Surface.3. You can use the Ctrl key to multi-select the vertices. You can add, remove and change the selected vertices.

  5. Click the manipulator to project the edges.

    You can see that the edges are projected.
    The result is:

  • All modification commands can be applied to multiple surfaces.
  • When you work with more than a one subdivision surface, if the working zone option is activated (or deactivated); it will be activated (or deactivated) for the entire selected subdivision surfaces. For more information on working zone, refer to Defining The Working Zone.
  • If you have selected the faces or edges or vertices of a subdivision, and further deselected the subdivision, then reselecting this subdivision will highlight all previously selected elements.
 

Smart Selection of Multiple Surfaces

Open the SmartSelection.CATPart document.
In case a feature has more than one parent, it is possible to select and modify the required subdivision surfaces using the Crtl key. Using the Parents/Children... contextual menu command, you can see that the edge fillet (EdgeFillet.1) feature has three subdivision surfaces as parent.
  1. Select EdgeFillet.1 and click Modification to modify it. You can see that all the parent subdivision surfaces are highlighted in the specification tree. The Tools Palette also appears.
  2. Press Ctrl key and select the parent subdivision surfaces you want to modify.
    In this case select two subdivision surfaces.
  3. Click End Selection in the Tools Palette to validate the selection. You can see that the selected subdivision surfaces can now be modified.
If Ctrl key is not pressed and you select a surface in geometry, then the modification of the selected surface starts immediately without any validation. Multiple surfaces cannot be selected in geometry.