Crack-free rendering of dynamically tesselated B-rep models

We propose a versatile pipeline to render B‐Rep models interactively, precisely and without rendering‐related artifacts such as cracks. Our rendering method is based on dynamic surface evaluation using both tesselation and ray‐casting, and direct GPU surface trimming. An initial rendering of the sce...

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Vydáno v:Computer graphics forum Ročník 33; číslo 2; s. 263 - 272
Hlavní autoři: Claux, Frédéric, Barthe, Loïc, Vanderhaeghe, David, Jessel, Jean-Pierre, Paulin, Mathias
Médium: Journal Article
Jazyk:angličtina
Vydáno: Oxford Blackwell Publishing Ltd 01.05.2014
Wiley
Témata:
Analysis
Categories and Subject Descriptors (according to ACM CCS)
Computer graphics
Computer Science
Cracks
Dynamics
Flaw detection
Graphics
I.3.3 [Computer Graphics]: Picture/Image Generation-Display algorithms
I.3.5 [Computer Graphics]: Computational Geometry and Object Modeling-Boundary representations
Image detection
Image processing systems
Mathematical models
Navigation
Rendering
Run time (computers)
Studies
Fast rendering of massive B-REP models
Computer Aided Geometric Design
3D computer graphics
ISSN:0167-7055, 1467-8659
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Popis
Shrnutí:We propose a versatile pipeline to render B‐Rep models interactively, precisely and without rendering‐related artifacts such as cracks. Our rendering method is based on dynamic surface evaluation using both tesselation and ray‐casting, and direct GPU surface trimming. An initial rendering of the scene is performed using dynamic tesselation. The algorithm we propose reliably detects then fills up cracks in the rendered image. Crack detection works in image space, using depth information, while crack‐filling is either achieved in image space using a simple classification process, or performed in object space through selective ray‐casting. The crack filling method can be dynamically changed at runtime. Our image space crack filling approach has a limited runtime cost and enables high quality, real‐time navigation. Our higher quality, object space approach results in a rendering of similar quality than full‐scene ray‐casting, but is 2 to 6 times faster, can be used during navigation and provides accurate, reliable rendering. Integration of our work with existing tesselation‐based rendering engines is straightforward.
Bibliografie:ArticleID:CGF12308
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ISSN:0167-7055
1467-8659
DOI:10.1111/cgf.12308