# Geometric parameter: about

## Principle of use

Geometric parameters are entities that can be used for the geometry building of the device, i.e. for the definition of points, Tube Points, geometric transformations and other geometric parameters.

The modification of a parameter is immediately reflected on the geometry, i.e. on the Tube Points, Geometric Tubes, points, lines, faces and volumes, but the topological coherence of the obtained geometry is not controlled, the user must check it himself.

To check the consistency of the geometry created by means of Assimilation conductor mode, the user can use tools of dimensional checking.