hedge_presrcvertex

int  hedge_presrcvertex(<geometry>geometry, int hedge)

<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.

hedge

Input half-edge.

Returns

The vertex number of the vertex that comes before the source vertex of the hedge in the primitive that contains hedge. Returns -1 if the half-edge is not valid.

Examples

examples

int presrcvtx;

// Get the pre-source vertex of half-edge number 3.
presrcvtx = hedge_presrcvertex("defgeo.bgeo", 3);