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M3deltaVertex
Takes a topology or a mesh as a parameter.
Redefines the coordinated of vertex number '_index_' for the topology referenced by the mesh.
The new values are added to the old ones : they are thus increments.
This function takes integer values
The topology associated to the mesh automatically switches to 'dynamic' mode (as opposed to 'static').

I M3deltaVertex (
S3d _session_
H3d _object_
I _index_
[I I I] _delta_
)
Parameters

_session_
3D Session
_object_
Topology or mesh
_index_
Vertex index
_delta_
Delta position
Return value

0 if successful, otherwise nil
Remark

In the case of a multi-topo mesh, only the active topology is concerned.