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Impostors can be used as an alternative representation of distant objects in complex 3D scenes. They work by replacing the distant object with a simple texture map. Although this texture map must be updated as the viewpoint moves around the scene, it is not necessary to do this every frame. The saving inherent in not completely rendering the entire scene for every frame means that using impostors...
We present two related algorithms for flattening (generating polyline approximations for) curves associated with planar cubic Bézier segments. One flattens the path curve, and the other flattens the left and right offset curves. The algorithm for flattening path curves yields an average of 67% of the vertices generated by recursive subdivision, while maintaining flatness to within 4% of the specified...
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