public World(GameObject scene, float size, Vector3 center, int maxLevel, float normalExtension, bool progressive = true, Graph.GraphType type = Graph.GraphType.CENTER) {
space = progressive ? new ProgressiveOctree(size, center - Vector3.one * size / 2, maxLevel) : new Octree(size, center - Vector3.one * size / 2, maxLevel);
space.BuildFromGameObject(scene, normalExtension);
spaceGraph =
type == Graph.GraphType.CENTER ? space.ToCenterGraph() :
type == Graph.GraphType.CORNER ? space.ToCornerGraph() : space.ToCrossedGraph();
}