Point: about
Points
Points can be created:
- manually (entering coordinates)
- by propagation from existing points, with the aid of a transformation
- within the propagation or extrusion from other entities
Point coordinates
A point could be defined by its coordinates in a coordinate system for definition (see Coordinate system: about ).
Point defined by propagation
A point could be defined by propagation from another point with the aid of a transformation.
Parameter setting
The point coordinates can be defined using algebraic expression. The algebraic expression can contain:
- constants
- geometric parameters (created beforehand)
- basic mathematical functions using operators : +, -, *, /, ( )
- usual mathematical functions admitted by FORTRAN
The mathematical functions are described in section Functions.