addvertex

int  addvertex(int geohandle, int prim_num, int point_num)

geohandle

A handle to the geometry to write to. Currently the only valid value is 0 or geoself, which means the current geometry in a node. (This argument may be used in the future to allow writing to other geometries.)

prim_num

The primitive number to add the vertex to.

point_num

The point number to wire the new vertex to.

Returns

Returns a linear vertex index, or -1 if the vertex could not be added. You can use this number with setvertexattrib to set attributes on the new vertex, however this number may not be the final vertex index.