A point is the simplest geometric entity.
A point is defined in 3D space. Whichever co-ordinate system is used to set up the point, it is always stored as three real numbers in Cartesian co-ordinates.
Methods of point definition include:
Absolute co-ordinate position
Arc centre
Screen position
Existing point
Middle point of an existing entity known as a mid-point
End point of an existing entity
Intersection of any two entities
A distance modification from any of the above point definitions
See Also