|
| |||
returns true iff the three points p, q
and r form a left turn or if they are collinear and
the distance of q to p is
larger than the distance of r to p, where p is the point
passed to the object at construction. Precondition: p does not lie in the interior of the segment rq, i.e. p is an extreme point with respect to {p,q,r}. |