Implicit mapping mechanism in pen-based three-dimensional modeling system
-
摘要: 笔式三维建模系统支持用户基于纸笔隐喻自由勾画以表达三维模型,系统根据用户的交互意图完成相应的三维建模.针对笔式三维建模技术的交互特征,提出一种隐式映射机制.通过分析二维笔划以及交互的上下文,动态建立2个相互垂直的、虚拟的投影平面,从而将二维笔划信息平滑转换成三维空间信息.针对极限位置无法正常映射的情况,提出了一种坐标增量置换法来实现三维映射,不仅解决了极限位置的坐标映射,而且支持用户自由勾画更加复杂的三维模型.隐式映射机制将用户从繁琐、复杂的操作中解脱出来,集中精力关注创作灵感的表达.该方法已经在自主开发的笔式三维建模系统的原型系统PenSketch3D中得到验证,并取得了良好效果.Abstract: The pen-based three-dimensional modeling system supports the user to sketch freely based on pen-paper metaphor so as to express three-dimensional models, and carries out corresponding three-dimensional modeling according to the user’s interaction intention. A kind of implicit mapping mechanism was proposed according to the characteristics of pen-based three-dimensional modeling technology. Two virtual projecting planes, which were vertical reciprocally, were constructed dynamically through analyzing the two-dimensional stroke and the interaction context so as to transform the two-dimensional stroke to three-dimensional spatial information smoothly. A method of coordinate increment replacement was proposed to dissolve the problems of mapping in ultimate positions. As a result, not only the problems of coordinate mapping from two-dimensional stroke tothree-dimensional spatial information in ultimate positions were settled, but also the user could sketch more freely to express much more complicated three-dimensional models. The user could be free from fussy and complicated operations by implicit mapping mechanism and concentrate on expressing his creative inspiration. It has been validated in a prototype system, PenSketch3D, with promising effect.
-
[1] 栗阳,关志伟,戴国忠.笔式用户界面开发工具研究[J].软件学报,2003,14(3):392-400 Li Yang, Guan Zhiwei, Dai Guozhong. Research on development tools for pen-based user interfaces[J]. Journal of Software,2003,14(3):392-400(in Chinese) [2] 巩应奎,梅中义,范玉青,等.基于手势输入构造三维概念模型的研究进展[J].计算机辅助设计与图形学学报,2005,17(7):1389-1394 Gong Yingkui, Mei Zhongyi, Fan Yuqing, et al. The state-of-the-art of research on constructing 3D conceptual models based on gesture[J]. Journal of Computer-Aided Design & Computer Graphics, 2005,17(7):1389-1394(in Chinese) [3] Qin S F, Wright D K, Jordanov I N. From on-line sketching to 2D and 3D geometry:a system based on fuzzy knowledge[J]. Computer-Aided Design,2000,32(14):851-866 [4] Qin S F, Harrison R, West A A, et al. A framework of web-based conceptual design[J]. Computers in Industry, 2003,50(2):153-164 [5] 马翠霞,张凤军,陈由迪,等.支持概念设计的特征手势建模[J].计算机辅助设计与图形学学报,2004,16(4):559-565 Ma Cuixia, Zhang Fengjun, Chen Youdi, et al. Feature-gestures modeling of sketch in conceptual design[J]. Journal of Computer-Aided Design & Computer Graphics,2004,16(4):559-565 (in Chinese)
点击查看大图
计量
- 文章访问数: 2865
- HTML全文浏览量: 125
- PDF下载量: 926
- 被引次数: 0