Interaction with 3‐D Objects

Among the several issues related to real-time animation of virtual human actors, the ability to interact with virtual objects requires special attention. Take as example usual objects as: automatic doors, general furniture, or a lift. Interaction with such objects can easily become too complex for real-time applications. Some of the related problems involve: recognition of manipulation places, automatic arm and hand animation, and motion synchronization between actors and objects. The smart object approach is described here and can overcome many of these difficulties by storing all needed interaction information within the object description. Interaction information is defined during modeling phase, forming a complete “user guide” of the object. In this way, virtual actors can simply access and follow such interaction descriptions in order to accomplish some given task. Solutions to related sub-problems such as programming object’s behaviors, interactions with multiple actors, or actor animation to manipulate objects are discussed here, and detailed case studies are analyzed.

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