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A technique for rendering complex portals

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2 Author(s)
Lowe, N. ; Sch. of Comput. Sci. & Software Eng., Western Australia Univ., Australia ; Datta, A.

We identify a general paradigm for portal-based rendering and present an image-space algorithm for rendering complex portals. Our general paradigm is an abstraction of portal-based rendering that is independent of scene geometry. It provides a framework for flexible and dynamic scene composition by connecting cells with transformative portals. Our rendering algorithm maintains a visible volume in image-space and uses fragment culling to discard fragments outside of this volume. We discuss our implementation in OpenGL and present results that show it provides correct rendering of complex portals at interactive rates on current hardware. We believe that our work is useful in many applications that require a means of creating dynamic and meaningful visual connections between different sets of data.

Published in:

Visualization and Computer Graphics, IEEE Transactions on  (Volume:11 ,  Issue: 1 )

Date of Publication:

Jan.-Feb. 2005

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