The class PointCollection at #11400 is intended for uniform handling of ray/line generators and their subsets for cones, fans, and, eventually, lattice polytopes. This ticket is about making the switch for cones.

Apply: attachment: trac_12544_switch_cones_to_PointCollection_folded.patch

Depends on #12965

CC: @vbraun

Component: geometry

Keywords: toric, sd40.5

Author: Andrey Novoseltsev

Reviewer: Volker Braun

Merged: sage-5.2.beta1

Issue created by migration from https://trac.sagemath.org/ticket/12544