CraigBuilds / QuadTreeV2

/// 4 quadrants, each containing 4 quadrants, each containing 4 Leafs
//  ___ ___   ___ ___     ___ ___   ___ ___
// |___|___| |___|___|   |___|___| |___|___|
// |___|___| |___|___|   |___|___| |___|___|
//  ___ ___   ___ ___     ___ ___   ___ ___
// |___|___| |___|___|   |___|___| |___|___|
// |___|___| |___|___|   |___|___| |___|___|
//
//  ___ ___   ___ ___     ___ ___   ___ ___
// |___|___| |___|___|   |___|___| |___|___|
// |___|___| |___|___|   |___|___| |___|___|
//  ___ ___   ___ ___     ___ ___   ___ ___
// |___|___| |___|___|   |___|___| |___|___|
// |___|___| |___|___|   |___|___| |___|___|