pointhedge

int  pointhedge(<geometry>geometry, int point)

int  pointhedge(<geometry>geometry, int srcpoint, int dstpoint)

<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 for the source point of the returned half-edge. 0 is the first point.

srcpoint, dstpoint

The point numbers in the geometry for source and destination of returned half-edge. 0 is the first point.

Returns

The number of a half-edge that has point as source or has srcpoint as source and dstpoint as destination. In the former case, using op:pointhedgenext one can enumerate over all the half-edges that have point as source. Returns -1 if the half-edge is not valid.

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);
};