## Kernel::Orientation_3

A model for this must provide:

Orientation

fo.operator() ( | Kernel::Point_3 p, Kernel::Point_3 q, Kernel::Point_3 r, Kernel::Point_3 s)

|  | returns POSITIVE, if s lies on the positive side of the oriented plane h defined by p, q, and r, returns NEGATIVE if s lies on the negative side of h, and returns COPLANAR if s lies on h.

### Refines

AdaptableFunctor (with four arguments)

### See Also

CGAL::orientation