int invertexgroup(string filename, string groupname, int vertexnum)
int invertexgroup(int opinput, string groupname, int vertexnum)
<geometry>
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 op:/path/to/sop
reference.
vertexnum
The linear vertex number of the vertex to test.
To convert a primitive number and vertex number within that primitive to a linear vertex number for the vertexnum
parameter, use the vertexindex function.
Returns
1
if the group exists and the vertex is in the group, or 0
otherwise.
This can use adhoc groups, like 42p02
. It matches the SOP group naming
convention, in particular that an empty string means all vertices.
groups  
vertex 
