Represents a rectangle in defined by min and max as two opposing points
Represents a cube in defined by min and max as two opposing points
Implements the the algorithm defined in: Tropf paper to find: LITMAX: maximum z-index in query range smaller than current point, xd BIGMIN: minimum z-index in query range greater than current point, xd
Implements the the algorithm defined in: Tropf paper to find: LITMAX: maximum z-index in query range smaller than current point, xd BIGMIN: minimum z-index in query range greater than current point, xd
(LITMAX, BIGMIN)