Woodward, Charles D.A.A.G. Requicha2015-09-292015-09-2919861017-4656https://doi.org/10.2312/eg.19861011The complexity of free-form surface construction and interaction can often be reduced with methods of crosssectional design. A number of such methods, includin sweeps, skinning and surface interpolation are described in this paper for the B-spline surfaces. The methods are demonstrated with examples using the CUBES subroutine package.10.2312/eg.19861011