CGAL 5.5 - 2D and 3D Linear Geometry Kernel
Kernel::CompareSlope_3 Concept Reference

## Definition

Refines:
AdaptableFunctor (with two arguments)
CGAL::compare_slope()
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.