The 3-D meshing visualization tool helps users verify that the meshed geometry accurately represents the CAD geometry. It is particularly useful when checking the connectivity of antennas or transmission lines that cross multiple cutplanes. The 3-D Mesh controls are enabled by double-clicking on Mesh in the Project Tree, then selecting the option at the bottom of the mesh view control panel.

Viewing Modes

A single finite-difference time-domain (FDTD) cell contains 12 cell edges and six faces, which are rendered according to the user's 3-D mesh viewing mode selection.

The four modes are shown below:

In the faces only and faces with edges modes, a face without a dominant color will render as a hole. The following image contains four holes, each of which has two cell edges that are green and two cell edges that are red. Because XFdtd cannot assign more than one color to a single face or determine which color is more important, the faces were not rendered and appear as holes.

FDTD computes fields on cell edges, so holes do not generate an error during the FDTD simulation. The face colors in the 3-D mesh assist with visualization only.

Cropped View

Rendering the entire mesh takes seconds to minutes but is unnecessary when users want to verify the mesh in a specific region. Unchecking the Entire Mesh option allows users to define and view a cropped area.

The bounding box of the cropped mesh can be specified using a combination of the following methods:

Multiple cropped regions can be stored and recalled using the button.

0:27 Uncheck Entire Mesh. 0:42 Bound to Selection. 1:25 Set material invisible.