@inproceedings { , title = {Implicit curve and surface design using smooth unit step functions}, abstract = {This paper presents an implicit curve and surface design technique that uses smooth unit step functions. With the proposed method, an implicit curve or surface can be generated by inputting a sequence of points together with the normals at these points of the curve or surface to be designed. By choosing appropriate smooth unit step functions, these curves and surfaces can be designed to any required degree of smoothness.}, conference = {ACM Symposium on Solid and Physical Modeling}, isbn = {3-905673-55-X}, journal = {ACM Symposium on Solid Modeling and Applications, SM}, note = {Batch 007. Output ID 42090.}, pages = {237 - 242}, publicationstatus = {Published}, url = {https://hull-repository.worktribe.com/output/423866}, keyword = {Specialist Research - Other}, year = {2004}, author = {Li, Qingde and Phillips, Roger} }