Constructed Solid Geometry (CSG)

All Geant4 CSG, except paraboloid, can be implemented using pure text with simple syntax. Shapes demonstrated in this repository include box, cone section, ellipsoid, generic trapezoid, generic trapezoid twisted along z, hyperbolic tube profile, parallelepiped, polycone, polyhedra, right angular wedge, sphere, tetrahedra, trapezoid, trapezoid twisted along z, torus, tub section, twisted box, twisted tub section.