MeshSurf

Entity/Object	Variable	Description
integer		Version.
integer	nv	Number of mesh vertices.
double[nv][5]	p	Coordinates and parameters for each mesh vertex.
integer	nt	Number of mesh triangles.
integers[nt][3]	elem	Matrix of (0-based) mesh vertex indices for each mesh triangle.

A MeshSurf represents a continuously differentiable surface formed by using piecewise quadratic interpolation on a surface mesh. The surface mesh is given by a set of mesh vertices and a matrix elem defining the triangle connectivity. The surface parameter values of each mesh vertex is also given. For each mesh triangle, a quadratic interpolation is used on each of the four subtriangles.