Abstract
We have been studying the use of rich media to support creative and intelligent human activities. Over the past ten years we have focused on the 3D space as one of rich media and have developed many sketch systems that support the design of 3D objects. However, long-term evaluation has revealed that they are not used by designers in the field on an ongoing basis. Even worse, they are treated as if they were merely attractions in an amusement park. The fundamental problem was the lack of an indispensable function that needs a 3D space. To overcome this problem, we previously developed a system that incorporates two new functions, life-size and operability, to make a 3D sketch system that is indispensable to designers. We have now enhanced the system by extending these two functions to overcome problems identified in the previous system.
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