Construction by extrusion: about

Definition

The construction by extrusion is a building method that allows the construction of new geometric entities based on already existing entities by using a geometric transformation like translation, rotation, …

Example

In the figure below, the parallelepiped is built by extrusion of the existing parallelogram (source) using a translation vector.

Notice

We deal with:

• propagation, when the image object, generated by transformation, is not connected by lines to the source object
• extrusion, when the image object, generated by transformation, is connected by lines to the source object