基于细分思想的自由造型技术在CACD中的应用

Application of FFD based on subdivision surfaces in CACD system

设计一个快速的交互式工具支持概念设计,将细分曲面及自由变形技术应用到计算机辅助概念设计(CACD)中;在t-FFD算法基础上,提出了基于细分曲面的自由变形算法思想,将两者相融合,克服了t-FFD算法为获得光滑变形采用的距离加权融合方法的不足,使变形空间更光滑,变形更快速.应用该算法开发的CACD系统可提供用户一个方便快捷的设计工具,提高设计效率,优化变形效果.

In the process of product design, the conceptual design phase is decisive. A real-time interactive tool is developed. Catmull- Clark subdivision surfaces and free-form deformation are used in Computer Aided Conceptual Design （CACD）. On the basis of t - FFD, an approach for free-form deformation based on subdivision surfaces is proposed, which may overcome the t- FFD＇s shortage that uses the blending method for smooth deformation. Finally, the real-time interactive and smoothly deformed shapes are achieved.