Multi-Touch Interface for Character Motion Control Using Model-Based Approach

In this paper, we propose a new method for interactive motion control with a multi-touch interface. A user of our system can touch and drag character´s body parts to control its motion. The character´s full body motion is driven by our interactive motion control model based on the movement of a few body parts which are directly manipulated by the user via the multi-touch interface. We propose a method for determining 3-dimensional positions of controlled body parts from 2-dimensional touch inputs based on the character´s local coordinates and drag speed. We introduce a point-based pose representation which consists of the positions or orientations of a small number of primary body parts. Based on the representation, we develop a motion control model that includes modules for tracking, balance, inter-body interaction, relaxing and self-collision avoidance. The character´s pose is reconstructed from the point-based pose representation. We present our experimental results to show that our framework can realize various natural-looking motions.