Volume clipping via per-fragment operations in texture-based volume visualization

  • Authors:
  • Daniel Weiskopf;Klaus Engel;Thomas Ertl

  • Affiliations:
  • Visualization and Interactive Systems Group, University of Stuttgart, Germany;Visualization and Interactive Systems Group, University of Stuttgart, Germany;Visualization and Interactive Systems Group, University of Stuttgart, Germany

  • Venue:
  • Proceedings of the conference on Visualization '02
  • Year:
  • 2002

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Abstract

We propose new clipping methods that are capable of using complex geometries for volume clipping. The clipping tests exploit per-fragment operations on the graphics hardware to achieve high frame rates. In combination with texture-based volume rendering, these techniques enable the user to interactively select and explore regions of the data set. We present depth-based clipping techniques that analyze the depth structure of the boundary representation of the clip geometry to decide which parts of the volume have to be clipped. In another approach, a voxelized clip object is used to identify the clipped regions.