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�������պ����ѧѧ�� 2006, Vol. 32 Issue (05) :603-606    DOI:
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��Ӧ��1, ������1, ��־��2*
1. �������պ����ѧ ��е���̼��Զ���ѧԺ, ���� 100083;
2. �������������е�����ල��������,���� 100007
Implicit mapping mechanism in pen-based three-dimensional modeling system
Gong Yingkui1, Fan Yuqing1, Wu Zhifang2*
1. School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
2. Quality Inspection Center of Beijing Materials Handling Research Institute, Beijing 100007, China

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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.
Keywords�� pen-based user interfaces   three-dimensional modeling   implicit interaction   human computer interaction     
Received 2005-05-16;

����863�߼����о���չ�ƻ�������Ŀ(2003AA411330); ����973�ص�����о�����������Ŀ(2002CB312103)

About author: ��Ӧ��(1974-),��,ɽ��ƽң��,��ʿ��, ykgong@163.com.
��Ӧ��, ������, ��־��.��ʽ��ά��ģϵͳ����ʽӳ�����[J]  �������պ����ѧѧ��, 2006,V32(05): 603-606
Gong Yingkui, Fan Yuqing, Wu Zhifang.Implicit mapping mechanism in pen-based three-dimensional modeling system[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2006,V32(05): 603-606
http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2006/V32/I05/603
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