…ew internal structure. Finished implementing it. Added isInert() checks to collision, containment, intersection, and knn algorithms of each implementation.
… of sphere. Updated overlap to return a non-squared number that represents the actual insertion distance between two spheres. If they aren't intersecting, 0.0 is returned. Fixed SpatialQuadNode.contains(...). Added intersection and containment measuring and drawing as well as accuracy compared to brute-force method.
…faster than bruteforce. Updated SpatialDatabaseExample to include SpatialQuadTree. Added handleCollision(...) to SpatialUtility.
Added clear() to SpatialDatabase interface.
… examples into one.