Issue No.12 - December (1987 vol.7)
Hiroaki Chiyokura , Ricoh Co.
An extended rounding operation can be an excellent tool for modeling solids with free-form surfaces. Using the rounding operation, the edges and vertices of a solid can be locally rounded, and those parts of the solid are changed to free-form surfaces. As a user, you put in information about edges that should be rounded and the radii of curves generated by the operation. This facility has been implemented in our solid modeling system, Desiqnbase.
Hiroaki Chiyokura, "An Extended Rounding Operation for Modeling Solids with Free-Form Surfaces", IEEE Computer Graphics and Applications, vol.7, no. 12, pp. 27-36, December 1987, doi:10.1109/MCG.1987.276936