2.4  Three dimensional Surfaces

In the subroutines that solve Laplace problems in three dimensions ( LIBEM3, LEBEM3 and LSEM3) the boundaries must be represented in the form of a set of planar triangles. In order that the normal to the boundary points outward rather than inward the three nodes that define each element must be listed in the anti-clockwise direction when it is viewed from just outside the surface. The programs LIBEM3_T and LEBEM3_T LSEM3_T each solve Laplace problems in which the boundary under consideration is that of a sphere of unit radius.

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