Fairing the Plines

As fairing a 3D curve is extremely difficult, this is done by projecting each Pline into two 2D Clines. The system automatically projects the Pline into the two selected views, then presents the curves one at a time for the user to fair. Normally the user should only modify one projection view in order to minimize the extent of any changes. Having examined both views the system will merge the two projections to either overwrite the old curve or create a new 3D curve.