VOLUME OF A PENTAHEDRON REVISITED.

The volume of a pentahedron is calculated in terms of dihedral angles, sides, face angles of component tetrahedrons (3-simplex) using an exact computation technique (known as signed simplex decomposition). Here the signed simplex decomposition means an established technique to subdivide a polyhedra (a simplicial complex or more strictly CW complex) to component tetrahedral (3-simplex) which is used in computer graphics where meshes with pyramids, prisms or hexahedra must be subdivided into tetrahedral to use efficient algorithms for volume-rendering, iso-contouring and particle advect. Moreover we attempt to give a tensorial notation of the volume of the pentahedron. [ABSTRACT FROM AUTHOR]