Bivariate 3-direction is a triangulation with the least directions. Box spline built on it is widely applied in CAGD.
NURBS曲線曲面形狀修改一直是CAGD中的關鍵技術之一,對該問題的研究具有十分重要的理論意義和應用價值。
本文還討論了B樣條基轉換矩陣在CAGD中的應用,特別討論了B樣條曲線的節點*入、升階和分解問題。
NURBS method is one of the most important methods in CAGD, and has been widely used in industrial product form design.