[vtk-developers] Multiple overlapping volumes

[Elvis Stansvik]

Thanks for responding Steve, and for the links. Very interesting.

Did you consider using VTK.js for your Slicer/WebGL experiment, or was it
not mature enough at the time?

(We have (very) preliminary plans for a web version of our program, and it
would be great if VTK.js gained mixed/intersecting volume support just like
VTK recently did.)

Elvis

Den 26 feb. 2018 4:40 em skrev "Steve Pieper" <pieper at isomics.com>:

> Hi Guys -
>
> That video was made using some code I've been playing with for a while [1]
> to see how much of a program like Slicer could be implemented in JavaScript
> and WebGL(2).  The web environment is very powerful and it's great to see
> vtk.js develop.
>
> We've also looked a bit at what it would take to make libraries of GLSL
> code that could work in either desktop OpenGL or WebGL (the CommonGL idea
> [2]).
>
> Best,
> Steve
>
> [1] https://github.com/pieper/sites/tree/gh-pages/step
>
> [2] https://public.kitware.com/pipermail/vtk-developers/
> 2015-June/032132.html
>
> On Mon, Feb 26, 2018 at 9:52 AM, Sebastien Jourdain <
> sebastien.jourdain at kitware.com> wrote:
>
>> Hi Elvis,
>>
>> Regarding vtk.js, the video you shared wasn't based on vtk.js. But vtk.js
>> does support mix of geometries and a volume. Although, right now, you can
>> not mix volumes.
>>
>> HTH,
>>
>> Seb
>>
>> On Mon, Feb 26, 2018 at 3:23 AM, Elvis Stansvik <
>> elvis.stansvik at orexplore.com> wrote:
>>
>>> 2018-02-26 10:06 GMT+01:00 Elvis Stansvik <elvis.stansvik at orexplore.com>
>>> :
>>> > Hi folks,
>>> >
>>> > I think I asked about support for rendering multiple overlapping
>>> > volumes a couple of years ago, but can't find the mail.
>>> >
>>> > I just came across this wiki page from June last year:
>>> >
>>> >     https://na-mic.org/wiki/Project_Week_25/Next_Generation_GPU
>>> _Volume_Rendering
>>> >
>>> > It mentions that "Multiple volume support is in development at
>>> > Kitware" and lists "Overlapping volumes - multiple inputs to mapper"
>>> > under "Work in progress".
>>> >
>>> > I'm just curious if that work was continued or put on hold.
>>>
>>> I should have checked Git history before sending this mail. I now found
>>>
>>>     https://gitlab.kitware.com/vtk/vtk/commit/a632f77e3fa955dbf1
>>> 7813a803ddae43a9675021
>>>
>>> "Added support for multiple volume inputs in GPUVolumeRayCastMapper".
>>>
>>> This is fantastic news! I shall experiment with it ASAP.
>>>
>>> Elvis
>>>
>>> >
>>> > I also found https://www.youtube.com/watch?
>>> time_continue=28&v=ML9_JWAz1kY
>>> > which shows a proof-of-concept in WebGL (uploaded by Steve Pieper).
>>> > Anyone know if the code for that experiment is available? Was it done
>>> > using/on top of VTK.js?
>>> >
>>> > Best regards,
>>> > Elvis
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