Ray casting curved-quadratic elements

  • Authors:

  • D. F. Wiley;H. R. Childs;B. Hamann;K. I. Joy

  • Affiliations:

  • Center for Image Processing and Integrated Computing, Department of Computer Science, University of California, Davis, CA;Lawrence Livermore National Laboratory, Livermore, CA;Center for Image Processing and Integrated Computing, Department of Computer Science, University of California, Davis, CA;Center for Image Processing and Integrated Computing, Department of Computer Science, University of California, Davis, CA

  • Venue:
  • VISSYM'04 Proceedings of the Sixth Joint Eurographics - IEEE TCVG conference on Visualization
  • Year:
  • 2004

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Abstract

We present a method for ray casting curved-quadratic elements in 3D. The advantages of this approach is that a curved element can be directly visualized. Conventionally, higher-order elements are tessellated with several linear elements so that standard visualization techniques can be applied to the linear elements. Our method primarily focuses on how to find an approximation to the intersection between a ray and a curved-quadratic element. Once this approximation is found, conventional accumulation and color mapping techniques can be applied to the approximation to produce a volumetric visualization of the element. A cutting plane implementation is also shown that leverages the ray casting technique.