Development of virtual clay modeling system for creative 3D design

许多计算机输入设备已被提出，键盘用于符号信息，鼠标用于二维信息。在虚拟环境中输入的效果必须诉诸于感觉器官，因为人类在现实世界中是通过五种感官来感知外部世界的。在处理三维物体时，重要的感知信息是从视觉、触觉、听觉等感官中获得的。在虚拟环境中处理三维物体需要一个高效的输入设备，它可以像人类在现实世界中处理物体一样处理这些虚拟物体。在这项研究中，我们提出了一个三维空间接口装置，使用绳，滑轮和电机。操作员指尖的位置是通过连接在指帽上的弦的长度来测量的。由马达拉紧的弦产生力感。操作人员可以轻松戴上帽子，不受约束地移动手指。我们用设备和3D计算机图形构建了一个拾取和放置任务的虚拟环境。操作者可以非常自然地看到和感觉到他/她的手的动作的结果。

Many input devices for computers have been proposed, keyboards are used for symbolic information and mice for two dimensional one.The effect of input in a virtual environment must be appealed to the sense organs because humans perceive the outside world from the five senses in real world.Important perceptual information while handling 3D objects is obtained from vision, haptic sensation, auditory sense, etc.The handling of three dimensional(3D) objects in a virtual environment requires an efficient input device which can handle these virtual objects as humans handle objects in real world.In this study, we proposed a 3D spatial interface device using strings, pulleys, and motors.The position of an operator's fingertip is measured by the lengths of the strings that are connected with a finger cap.The strings tensed by motors make force sensations.The operator can easily wear the cap, and move his/her fingers without restraint.We constructed a virtual environment for pick-and-place tasks with the device and 3D computer graphics.The operator could both see and feel the results of his/her hand motions in a very natural way.