Q, a convex polyhedron, preimage of P in the sublattice generated by its lattice points
Description
toSublattice can only be applied to polytopes, i.e. compact polyhedra. It calculates a basis of the sublattice generated by its lattice points, and then takes the affine preimage under the corresponding map.
i1 : P = convexHull transpose matrix {{0,0,0},{1,0,0},{0,1,0},{1,1,3}}
o1 = P
o1 : Polyhedron
i2 : toSublattice P
o2 = Polyhedron{...1...}
o2 : Polyhedron