Properties of generalized offset curves and surfaces

This paper proposes a definition of generalized offsets for curves and surfaces,which have the variable offset distance and direction,by using the local coordinate system. based on this definition,some analytic properties and theorems of generalized offsets are put forward. the regularity and the topological property of generalized offsets are simply given by representing the generalized offset as the standard offset. some examples are provided as well to show the applications of generalized offsets. the conclusions in this paper can be taken as the foundation for further study on extending the standard offset. © 2014 xuejuan chen and qun lin.