CGAL 4.12.1 - 2D and 3D Linear Geometry Kernel
Kernel::CompareSlope_3 Concept Reference

## Definition

Refines:
AdaptableFunctor (with two arguments)
CGAL::compare_slopes()

## Operations

A model of this concept must provide:

Comparison_result operator() (const Kernel::Point_3 &p, const Kernel::Point_3 &q, const Kernel::Point_3 &r, const Kernel::Point_3 &s)
compares the slopes of the segments (p,q) and (r,s), where the slope is the variation of the z-coordinate from the first to the second point of the segment divided by the length of the segment.