pointhedgenext

int  pointhedgenext(<geometry>geometry, int point)

<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.

point

The point number in the geometry. 0 is the first point.

Returns

The next half-edge that has the same source as hedge.

Successive calls to this function iterate over all outgoing half-edges out of the same point. The iteration order does not necessarily agree with the order of the edges around a point in a manifold setting.

Returns -1 if hedge is not valid, or the there are no more shared vertices with the source vertex of this hedge (same as op:vertexnext).

Examples

examples

int edge_count = 0;

// Count number of *edges* (not half-edges) incident to point number 23.
int hout = pointhedge("defgeo.bgeo", 23);
while ( hout != -1 )
{
    if (hedge_isprimary("defgeo.bgeo", hout))
        edge_count++;
    int hin = hedge_prev("defgeo.bgeo", hout);
    if (hedge_isprimary("defgeo.bgeo", hin))
        edge_count++;
    hout = pointhedgenext("defgeo", hout);
}