We present 3DTouch, a novel 3D wearable input device worn on the fingertipfor 3D manipulation tasks. 3DTouch is designed to fill the missing gap of a 3Dinput device that is self-contained, mobile, and universally working acrossvarious 3D platforms. This paper presents a low-cost solution to designing andimplementing such a device. Our approach relies on relative positioningtechnique using an optical laser sensor and a 9-DOF inertial measurement unit. 3DTouch is self-contained, and designed to universally work on various 3Dplatforms. The device employs touch input for the benefits of passive hapticfeedback, and movement stability. On the other hand, with touch interaction,3DTouch is conceptually less fatiguing to use over many hours than 3D spatialinput devices. We propose a set of 3D interaction techniques includingselection, translation, and rotation using 3DTouch. An evaluation alsodemonstrates the device's tracking accuracy of 1.10 mm and 2.33 degrees forsubtle touch interaction in 3D space. Modular solutions like 3DTouch opens up awhole new design space for interaction techniques to further develop on.
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