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This paper presents a novel augmented reality (AR) integrated three-dimensional (3D) touchable computer-aided design (CAD) system, which utilizes stereoscopic display and 3D input devices to achieve intuitive and convenient 3D interaction between a user and the system. In the AR environment, physical objects can provide visual and physical feedback to the user. Analysis has been made on the proposed system in the aspects of visual feedback and user input. CAD operations to effectively capture user's intention are developed for shape acquiring and editing. The basic setup of a prototype system is described. Several test cases are presented to demonstrate the functionality of the developed system and its effectiveness.

Shape Acquiring and Editing through an Augmented Reality based Computer-aided Design System