Holes

The example included below shows how to use esys.pycad to create a 2-D mesh in the shape of a trapezoid with a cut-out area, see Figure 5.2:

This example is included with the software in trapezoid.py in the example directory.

A CurveLoop is used to connect several lines into a single curve. It is used in the example above to create the trapezoidal outline for the grid and also for the triangular cutout area. You can use any number of lines when creating a CurveLoop, but the end of one line must be identical to the start of the next.

Figure 5.3: Three dimensional Block.