This function is used, to draw a transition between two ducts/pipes.
Access to the command over
Command line: _AUTOUEB
Assistant: 
| Ventilation Service | 
| automatic transition
The transition length is automatically calculated with a 30° angle and shown in window.
The length can also be modified by entering another value.
After picking the second point, the ducts are connected automatically:
The program calculates the duct-length in respect to the transition direction of construction.
The duct-length is always drawn before the transition.
Whether a duct is picked left, right or reverse, the same result is achieved.
