Non-Photorealistic Computer Graphics Library

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Proceedings Transparency in Interactive Technical Illustrations

Author(s): Joachim Diepstraten, Daniel Weiskopf, Thomas Ertl.
Proceedings: Proc. of EuroGraphics '02, 2002.
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This paper describes how technical illustrations containing opaque and non-opaque objects can be automatically generated. Traditional methods to show transparency in manual drawings are evaluated to extract a small and effective set of rules for computer-based rendering of technical illustrations, leading to a novel view-dependent transparency model. We propose a hardware-accelerated depth sorting algorithm in image-space which specifically meets the requirements of our transparency model. In this way, real-time rendering of semi-transparent technical illustrations is achieved. Finally, it is described how our approach can be combined with other methods in the field of non-photorealistic rendering in order to enhance the visual perception of technical illustrations.

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