Title: Using the Influence of Curve Tangent Vectors to Generate Approximately Uniformly Distributed Reference Points
Authors: Madi, Mohsen
Citation: WSCG '2006: Full Papers Proceedings: The 14-th international Conference in Central Europe on Computer Graphics, Visualization and Computer Vision 2006: University of West Bohemia, Plzen, Czech Republic, January 31 – February 2, 2006, p. 25-32.
Issue Date: 2006
Publisher: Václav Skala - UNION Agency
Document type: conferenceObject
konferenční příspěvek
URI: http://wscg.zcu.cz/WSCG2006/Papers_2006/Full/!WSCG2006_Full_Proceedings_Final.pdf
http://hdl.handle.net/11025/6652
ISBN: 80-86943-03-8
Keywords: parametrizace obloukové délky;Hermitova interpolace;referenční body;Béziérovy křivky
Keywords in different language: arclength parameterization;Hermite interpolation;reference points;Bézier curves
Abstract: We present a technique for the dynamic annotation of three-dimensional objects in interactive virtual environments. Annotations represent textual or symbolic descriptions providing explanatory or thematic information associated with scene objects. In contrast to techniques that treat annotations as two-dimensional view-plane elements, our technique models annotations as separate three-dimensional scene elements that are automatically positioned and oriented according to the shape of the referenced object. The shape of such an object is generalized by an annotation hull and skeleton used to determine an adequate position and orientation of the annotation with respect to the viewing direction. During camera movements, annotations float along the surface of the annotation hull. Additional constraints for the generalizations provide further control about geometric and dynamical properties. In a case study, we show how this technique can be applied for annotating buildings and other components of virtual 3D city models.
Rights: © Václav Skala - UNION Agency
Appears in Collections:WSCG '2006: Full Papers Proceedings

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