Way-finder: guided tours through complex walkthrough models
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The exploration of complex walkthrough models is often a difficult task due to the presence of densely occluded regions which pose a serious challenge to online navigation. In this paper we address the problem of algorithmic generation of exploration paths for complex walkthrough models. We present a characterization of suitable properties for camera paths and we discuss an efficient algorithm for computing them with little or no user intervention. Our approach is based on identifying the free-space structure of the scene (represented by a cell and portal graph) and an entropy-based measure of the relevance of a view-point. This metric is key for deciding which cells have to be visited and for computing critical way-points inside each cell. Several results on different model categories are presented and discussed.
CitacióAndújar, C.; Vázquez, P.; Fairén, M. Way-finder: guided tours through complex walkthrough models. "Computer graphics forum", Setembre 2004, vol. 23, núm. 3, p. 499-508.