抄録
We propose a 3-D modeler which can design and manipulate 3-D geometry in CAVE. In this system, two new techniques which can support modeling operations in a virtual environment are proposed. One is the technique which realizes the intuitive operation using a pen-type input device and simple gestures. The other is the technique in which operators can control the constraint condition dynamically according to their gestures and geometric characteristics of virtual objects. These techniques are very important to apply a high degree of freedom which is a merit of virtual environments to modeling operations. With this system, the operator can design 3-D objects more intuitively and more efficiently in a virtual environment.
