Finds all zones with centroids within f distance to position v, and returns all of them in a map.
The map key is the zone ID number, and the map value is a pointer to the zone.
No check is made for “live” status or against the constitutive model (even Null).
- Returns:
m - a map of all zones within the distance specified. Key is zone id number, value is zone pointer.
- Arguments:
v - a point in space
f - a distance representing a radius around point v.
9.1.13