BND_tria

create an independent triangle

An independent triangle can be defined by

the (initial) coordinates (x1,y1,z1), (x2,y2,z2), (x3,y3,z3) of the three corners of the triangle. The cross product (x2-x1,y2-y1,z2-z1)x(x3-x1,y3-y1,z3-z1) forms the inward pointing direction of the triangle:
begin_boundary_elements{} BND_tria &AliasName& x1 y1 z1 x2 y2 z2 x3 y3 z3 GeometryManipulations end_boundary_elements
the node indices ip1, ip2, and ip3 for the three corners of the triangle:
begin_boundary_elements{} BND_tria &AliasName& ip1 ip2 ip3 GeometryManipulations end_boundary_elements

If the triangle is defined by coordinates, MESHFREE automatically creates new node points as a basis.