Stefan Röttger

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MPR with OpenGL

This exercise is based on the previous one.

Exercise (8a)

• Load example DICOM data from “dicom-data/MR-Kiwi/*” or “dicom-data/MR-Artichoke/*”
• Upload the dicom volume to a 3D texture with glTexImage3D()
• Render a MPR with three axis-aligned slices through the volume.
  • Note: Vertex coordinates x,y,z in the range [−0.5,0.5] need to map to texture coordinates s,t,r in the range [0,1].

Home work (8b)

• Animate the position of the slices (either by automatic shifting or by mouse interaction).

Optional home work (8c)

• Render an arbitrarily aligned slice? How would you approach that?
  • A naive approach would be to render a slice that is larger than the entire unit cube and use 6 clip planes to cut off the overshoot.
    • What is the drawback? What is the advantage?
  • Can you think of better ways?

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