[vtk-developers] Multiple overlapping volumes

[Steve Pieper]

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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