/// <summary>
/// Clones this instance.
/// </summary>
/// <returns></returns>
public Grid Clone()
{
Grid grid = new Grid();
grid._gridCellSize = _gridCellSize;
grid._gridCellSizeInv = _gridCellSizeInv;
grid._aabb = _aabb;
grid._nodes = (float[,]) _nodes.Clone();
grid._points = (Vector2[]) _points.Clone();
return grid;
}