- Syntax:
`NoOverlap`[`Region`*region_expr*]*expression*[*string*]

This test fails if any source figure has non-zero intersection area with the figures associated the

*expression*. The*expression*must evaluate false at every point of every source figure. This is illustrated in Figure 15.3, for no*Region*and an expression consisting of a single layer.

Stephen R. Whiteley 2021-01-27