The area classes Area and TGArea have the following function and a number of arithmetic operators that let you perform operations on a set of 2-D geometry shapes to create an arbitrary shape from one or more geometry shapes. More information with examples for TArea and TGArea are given in Chapter 5.
| TArea | GetArea | IsRectilinear | SetToEmpty | |
| IsEmpty | IsSingular | |||
| TGArea | Add | Extract | Intersect | |
| Contains | GetEmptyArea | Intersects | ||
| ExclusiveOr | GetInfiniteArea | Subtract |
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