Development of virtual clay modeling system for creative 3D design

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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.