Abstract
The current modeling methods have difficulty in lacking intuitivity and interactivity, which exploits two-dimensional coordinate input device (e.g. mouse, pen tablet) to modify the 3D shapes. In our research project, intuitive and interactive shape modification system is to be constructed by the use of three-dimensional coordinate input device-haptic display. Adding the feedback of force sense when modifying shape in three-dimension, we have intended to integrate visual and haptic senses. In the way, we try to perform the system that can be controlled more intuitively. In this research, we construct a bending and twisting deformation system for 3D shapes with two devices operated by two hands. We place great importance on the feedback of torque (the tendency of a force to rotate an object about an axis) to construct the system.