Chung-Ming Wang  , Yuan-Yu Tsai  , 
    Effective Bounding Volumes for Monte Carlo Direct Lighting,
    Asian Journal of Information Technology,
    Volume 3,Issue 10,
    2004,
    Pages 898-906,
    ISSN 1682-3915,
    ajit.2004.898.906,
    (https://makhillpublications.co/view-article.php?doi=ajit.2004.898.906)
    Abstract: Bounding volumes are usually employed to accelerate computing for complex geometries. In this paper, we present a technique to derive a tunable bounding volume for an elliptic paraboloid, given a parameter related to the tightness. Each bounding volume thus developed is sufficiently tight to the original elliptic paraboloid under a user`s control. This tunable feature helps us selecting the most suitable bounding volume. It also contributes to achieve a balance between the computing efficiency and inherent overheads for bounding volumes. We implemented our technique in Monte Carlo applications where an elliptical paraboloid is considered as a luminaire for direct illumination and global illumination calculations. Experimental results verify the effectiveness of our technique.
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