Abstract: A simulator system includes functionality for dynamically tracking position and orientation of one or more simulation participants and objects as they move throughout a capture volume using an array of motion capture video cameras so that two- or three-dimensional (“2D” and “3D”) views of a virtual environment, which are unique to each participant's point of view, may be generated by the system and rendered on a display. In 3D and/or multi-participant usage scenarios, the unique views are decoded from a commonly utilized display by equipping the participants with glasses that are configured with shutter lenses, polarizing filters, or a combination of both. The object tracking supports the provision and use of an optical signaling capability that may be added to an object so that manipulation of the object by the participant can be communicated to the simulator system over the optical communications path that is enabled by use of the video cameras.

Abstract: An improved system and method is provided to defer the assignment of an attribute of an object in computer graphics. Through this improved method and system, a graphical object predefined in a computer graphics library can be reused with altered attributes. The operator first identifies the attribute expected to be altered and its corresponding attribute value. The attribute expected to be altered by the operator is included in an instance node related to the object along with the initial value.