# rays(PolyhedralObject) -- displays all rays of a Cone, a Fan, or a Polyhedron

## Synopsis

• Function: rays
• Usage:
R = rays F
R = rays P
• Inputs:
• Outputs:
• R,

## Description

rays returns the rays of the input as the columns of the matrix R.

Please see V- and H-representation on the conventions we use for cones and polyhedra.

 i1 : P = convexHull(matrix {{1,-1,2,-2},{1,1,2,2}}, matrix {{0},{1}}) o1 = P o1 : Polyhedron i2 : rays P o2 = | 0 | | 1 | 2 1 o2 : Matrix QQ <--- QQ i3 : C = coneFromVData P o3 = C o3 : Cone i4 : rays C o4 = | -1 1 | | 1 1 | 2 2 o4 : Matrix ZZ <--- ZZ i5 : F = normalFan P o5 = F o5 : Fan i6 : rays F o6 = | -1 1 0 -1 1 | | 0 0 1 1 1 | 2 5 o6 : Matrix ZZ <--- ZZ