Picture Language Machines

m n j = 0 -0" 1 (9.3)Of these methods the first is probably the most suitable for interactive design. ConclusionsThe Bezier method is one of the most convenient methods devised for the interactive approximation of curves.Moreover, the method extends naturally to surface description and provides a simple way of controlling surface parameters.Surface twist vectors which have been stumbling blocks in interactive surface design (they are essential for doubly curved surfaces) are easily defined, in a disguised manner.It is hoped that this paper will stimulate further work both in the field of shape description and in the field of interactive approximation.11.