hex_adjacent

int  hex_adjacent(<geometry>geometry, int primindex, int faceno)

<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.

primindex

The primitive number.

faceno

The face on the hexahedron. Ranges from 0 to 5.

Returns

The primitive number of the hexahedron attached to the given face. Returns -1 f the primitive is not a hex or doesn’t have an adjacent hexahedron.

Use hex_faceindex to get the vertex indices of each face of a hexahedron.