Introduction to point definition

Any geometric entity is defined by positions of its vertices. The vertices are defined as points inserted into required location. Any inserted point, regardless the entity type it relates to, can be defined in one of the following co-ordinate systems:

• Cartesian co-ordinate system

• Cylindrical co-ordinate system

• Spherical co-ordinate system

The choice of a particular system depends on several factors:

• how is the point position defined in the model drawings,

• what is the most efficient and most easiest way for the specific situation,

• which particular system is preferred by the user.