The Diagonalize command requires the selection of at least one quad-dominant domain (structured or unstructured) prior to being available. This command creates a new unstructured domain from the same loop of connectors via the chosen method.

Select a quad-dominant domain or domains, then go to Create, Diagonalize. A new unstructured domain or domains are generated automatically based on the currently selected method. Change the Diagonalization Method and Visibility/Delete Options if desired. Click OK to save the new unstructured domain and close the panel. Click Cancel to close the panel without saving the changes.

Use the Diagonalize command to create unstructured domains from existing quad-dominant domains.

Diagonalization Method

The Diagonalization Method frame provides options for specifying how the unstructured domains are created. There are four diagonalization methods to choose from:

  • Aligned: Splits all the existing quadrilaterals in the same direction throughout the domain. This method is only available if the selected domain(s) are structured and is the default method.
  • Best Fit: Splits the existing quadrilaterals such that the new triangles have the smallest possible maximum included angle.
  • Keep Quads: Keeps the current quadrilateral cells and transforms the structured domain into an unstructured one. This method is only available if the selected domain(s) are structured.
  • Initialize: Throws out the existing quadrilaterals and inserts a new triangulated mesh using the same initialization method used on newly created unstructured domains.

Visibility/Delete Options

The Visibility/Delete Options frame provides controls for how to treat the original domains from which the new unstructured domains are created. By default the original domains remain and are visible via Show. Select Hide to have the original domains automatically be hidden when you click OK to save and close the panel. Otherwise, use Delete to have the original domains deleted when the panel closes.