Specifies method of calculating distance between two points in 3D.

Values of this enumeration:

• Taxi - See https://en.wikipedia.org/wiki/Taxicab_geometry
• Maximum - See https://en.wikipedia.org/wiki/Chebyshev_distance
• Euclidean - More on Euclidean metric distance: https://en.wikipedia.org/wiki/Euclidean_geometry
• Z - The difference in Z axis.