int  pointvertices(<geometry>geometry, int ptnum)
When running in the context of a node (such as a wrangle SOP), this argument can be an integer representing the input number (starting at 0) to read the geometry from.
Alternatively, the argument can be a string specifying a geometry file (for example, a
.bgeo) to read from. When running inside Houdini, this can be an
The point number to get a vertex from.
An array of vertices that are wired to the given point. You should not rely on the numbers being in a particular order.
If the given point contains no vertices, the array will be empty.