面向概念设计的实体草绘建模

摘要

提出了一种简单、快速、高效的基于草绘设计的概念模型创建方法.该方法模仿传统的纸笔草绘设计方式,允许用户自由地在笔式用户界面上勾画特征笔划,然后根据笔划的形状和位置关系采用基于特征的实体建模方法构造不同的扫描特征体素.在此基础上,采用了基于意图捕捉的特征添加及切削机制创建复杂的实体模型,给出了一些关键算法的实现过程.实验结果表明,该方法能够较好地应用到联机三维概念模型快速创建过程中.%A simple, rapid and efficient approach to constructing 3D conceptual solid models on sketch-based user interface is presented. It emulates the traditional sketching design approach with paper and pencil to sketch strokes on the calligraphic interface, and then applies the feature-based modeling method to construct different sweep feature-based primitives according to the shape and location relationship of feature strokes. In order to construct complex solid models, the feature joining and cutting mechanism based on intention capturing is introduced. This paper illustrates the implementation of the algorithm, and experiment shows that the algorithm is efficient and well suitable for real time on-line 3D conceptual model creation.