NAME

       prism - Prism reference element

DESCRIPTION

       The prism reference element is

               K = { 0 < x < 1 and 0 < y < 1-x and -1 < z < 1 }

NUMBERING

       The  orientation  is  such  that  triedra  (01,  02, 03) is direct and all faces, see from
       exterior, are in the direct sens.  References: P. L. Georges, "Generation  automatique  de
       maillages", page 24-, coll RMA, 16, Masson, 1994.

                   z

                   3 ---- 5
                '  | .    |
             4 .  '|      |
             |     |      |
             |     |      |
             |     0 . . .2     y
             |  '    .
             1 .  '

           x

IMPLEMENTATION

       const size_t dimension = 3;
       const Float  measure = 1;
       const size_t n_vertex = 6;
       const point vertex [n_vertex] = {
               point( 0, 0,-1 ),
               point( 1, 0,-1 ),
               point( 0, 1,-1 ),
               point( 0, 0, 1 ),
               point( 1, 0, 1 ),
               point( 0, 1, 1 ) };
       const size_t  n_face = 5;
       const size_t face [n_face][4] = {
               { 0, 2, 1, size_t(-1) },
               { 3, 4, 5, size_t(-1) },
               { 0, 1, 4, 3 },
               { 1, 2, 5, 4 },
               { 0, 3, 5, 2 } };
       const size_t  n_edge = 9;
       const size_t edge [n_edge][2] = {
               { 0, 1 },
               { 1, 2 },
               { 2, 0 },
               { 0, 3 },
               { 1, 4 },
               { 2, 5 },
               { 3, 4 },
               { 4, 5 },
               { 5, 3 } };