hexa(9)
NAME
Hexaedra reference element
DESCRIPTION
The hexa reference element is [-1,1]^3.
NUMBERING
- The orientation is such that triedra (01, 03, 04) 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
- 4 - - -7
- . ' . . ' |
- 5 - - -6 |
| .| |
| .| |
| .| |
| 0|. . .3 y
| . ' | . '
1 - - -2 - x
IMPLEMENTATION
- const size_t dimension = 3;
const Float measure = 8;
const size_t n_vertex = 8;
const Float vertex [n_vertex][dimension] = { - {-1,-1,-1 },
{ 1,-1,-1 },
{ 1, 1,-1 },
{-1, 1,-1 },
{-1,-1, 1 },
{ 1,-1, 1 },
{ 1, 1, 1 },
{-1, 1, 1 } }; - const size_t n_face = 6;
const size_t face [n_face][4] = { - {0, 3, 2, 1 },
{0, 4, 7, 3 },
{0, 1, 5, 4 },
{4, 5, 6, 7 },
{1, 2, 6, 5 },
{2, 3, 7, 6 } }; - const size_t n_edge = 12;
const size_t edge [n_edge][2] = { - {0, 1 },
{1, 2 },
{2, 3 },
{3, 0 },
{0, 4 },
{1, 5 },
{2, 6 },
{3, 7 },
{4, 5 },
{5, 6 },
{6, 7 },
{7, 4 } };