Very often there is a need to build a 3D object of a certain cross-section along a complex path, such as piping, wiring, pipes, hoses of sleeves, etc. Such an object can be constructed using the EXTRUDE using the Trajectory parameter, or by using the SHIFT command on the toolbar Modeling.
First, we build a path necessarily using the POLYLINE command, the geometry can be any.
We construct a section that will be extruded, necessarily perpendicular to the trajectory, in our case it is a circle.
Select the command to EXTRUDE.
At the prompt, enter the command line » T » (for the Russian version of AutoCAD) ie squeeze the trajectory.