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dc.contributor.authorFlórez-Díaz, Jorge
dc.contributor.authorSbert, Mateu
dc.contributor.editorSkala, Václav
dc.identifier.citationWSCG 2010: Full Papers Proceedings: 18th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision in co-operation with EUROGRAPHICS, p. 151-158.en
dc.description.abstractThis paper introduces an efficient and reliable algorithm to create soft shadows for ray traced implicit surfaces. In a classical soft shadow creation process, many rays have to be traced to calculate how much of the area light is visible from a point. In our approach, we trace from a point a beam that covers the area light. If the beam is not occluded, the point can be safely discarded because the use of Interval Arithmetic guarantees that the point is fully lit by the area light. In this case, extra rays are not traced, thus extra intersection tests are not required. Our soft shadow algorithm is then 38% to 59% faster than an algorithm based in a regular number of beams traced for each point. Besides, the using of beams based on Interval Arithmetic guarantees that thin details of the surfaces are not lost during the process.en
dc.format8 s.cs
dc.publisherVáclav Skala - UNION Agencycs
dc.relation.ispartofseriesWSCG 2010: Full Papers Proceedingsen
dc.rights© Václav Skala - UNION Agencyen
dc.subjectměkké stínycs
dc.subjectimplicitní plochycs
dc.subjectsledování paprskucs
dc.subjectInterval Arithmeticcs
dc.titleReliable Soft Shadows over Implicit Surfacesen
dc.typekonferenční příspěvekcs
dc.subject.translatedsoft shadowsen
dc.subject.translatedimplicit surfacesen
dc.subject.translatedray tracingen
dc.subject.translatedInterval Arithmeticen
Appears in Collections:WSCG 2010: Full Papers Proceedings

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Please use this identifier to cite or link to this item: http://hdl.handle.net/11025/10854

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