Slicing a svLis-m model

Any svLis-m model, can be `sliced' to produce a model with fewer dimensions by specifying fixed values for the dimensions being sliced away. For example, an xy-slice of a model in xyz-space can be produced by specifying the z value at which the slice should occur.

Thus, any svLis-m model can be sliced to three or less dimensions to produce a three-dimensional graphical representation.

A 3D model is read into svLis-m. A 4D model is created with the 4th dimension being a rotation about the z-axis.

The 4D model is sliced in the z direction to create a 3D model that can be displayed.