The purpose of this base class is to provide ivars and methods shared by all locators. This method works in conjunction with vtkLocatorFilter to create polygonal representations for the locator.
Locators typically work as follows.
These entities are associated with one or more buckets. Then, when preforming geometric operations, the operations are performed first on the buckets, and then if the operation tests positive, then on the entities in the bucket. For example, during collision tests, the locators are collided first to identify intersecting buckets. If an intersection is found, more expensive operations are then carried out on the entities in the bucket. To obtain good performance, locators are often organized in a tree structure.