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M3topoAddVertexF
Takes a topology as a parameter.
Adds a new vertex to the list of vertices for the topology referenced by the mesh.
The position coordinates are floating-point values. The function returns the vertex’s index.

I M3topoAddVertexF (
S3d _session_
H3d _topo_
[F F F] _position_
)
Parameters

_session_
3D Session
_topo_
Topology
_position_
Position of new vertex
Return value

Index of the new vertex