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Editorial Team
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Asked: 2026-05-30T16:12:39+00:00

we are using VTK to render data in a regular desktop application, e.g. for

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we are using VTK to render data in a regular desktop application, e.g. for images such as this one:

http://www.invicro.com/images/stories/NasalMergeSolidLabeled.gif

and I was very excited to learn about xtk, which does an awesome job to produce the same renderings in a web browser. I already managed to export our ROIs in vtk so I can load them into xtk, e.g.

http://www.vivoquant.com/xtk/index.html

However, as you see in the image of the first link, I would like to also add the MIP rendering of the mouse (to provide some further context). On the VTK side I use a vtkVolume, vtkVolumeRayCastMIPFunction and vtkFixedPointVolumeRayCastMapper to produce the MIP rendering.
Unfortunately, I did not yet understand how to export this in a way xtk can use (similar to lessen 05 with skull.vtk).

Could you please let me know how you produced the skull.vtk example from a raw volume dataset?

Thank you very much. Awesome tool!
Christian

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1 Answer

  1. Editorial Team

    Christian, your demo looks awesome!

    Unfortunately, the volume rendering/MIP functionality is not available in XTK yet.

    Likely, it will be included in the next release 3 which is scheduled for 3/12/12.

    Right now, it is already possible to load .nrrd volume data files like in this (unofficial) lesson:
    http://lessons.goXTK.com/10/
    Please not that it uses the xtk_edge.js version which might be unstable.

    This functionality is the base for the upcoming volume rendering so you can imagine something like this:

    v = new X.volume();
v.load('rat.nrrd');
v.setVolumeRendering(true); // this call might change

    The skull.vtk file you refer to and which might look like MIP is actually just a surface model with reduced opacity 🙂

    Cheers,
    Daniel

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