The motion of impostors

Authors:
Adam Goinski;Slawomir Nikiel
Affiliations:
Institute of Control and Computation Engineering, University of Zielona Góra, Zielona Góra, Poland;Institute of Control and Computation Engineering, University of Zielona Góra, Zielona Góra, Poland
Venue:
Machine Graphics & Vision International Journal
Year:
2007

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Abstract

We describe a method that brings to life impostor-based environments. In a typical scene, supporting objects are rendered as two-dimensional texture maps always facing the camera. Billboards reduce complexity of objects to high extent. In such a representation, spatial properties of depicted objects are lost. Billboards are usually motionless in order to compress the video memory space. In our technique, we introduce 2.5D morphing with respect to the memory footprint. Minimum two textures are required to animate the billboard. Moreover, the whole process is automated and exploits a programmable GPU. As a result, the main application overhead is reduced. The method is designed for vegetation modeling, but can be easily extended to far- and middle-distance shots of humans.