In 1993, the-first-year-of-our-projects, we concentrated our efforts on the establishment of basic theories of our target system, especially theories of free-from surfaces. We could have various fruitful results that will be very useful to develop our system.
These results are as follows: 1. The development of a new type of free-form surface patches : NURBS-boundary-C-Gregory-patch 2. Gregory clipping : patch/line-intersection-calculation-algorithm 3. Parallel mesh generation algorithm based on the-vertex-label-assignment