[vtkusers] Requirements for multiple volumes in one render window

[Jaime Campos]

I'm also very interested in this issue/feature, anyone care to answer us ?
Will this be available in a near future ?

Thank you

Jaime

2016-04-20 14:08 GMT+01:00 Elvis Stansvik <elvis.stansvik at orexplore.com>:

> 2016-02-25 20:03 GMT+01:00 Elvis Stansvik <elvis.stansvik at orexplore.com>:
>
>> 2016-02-25 18:04 GMT+01:00 Aashish Chaudhary <
>> aashish.chaudhary at kitware.com>:
>>
>>> On Thu, Feb 25, 2016 at 11:44 AM, longbowzhang
>>> <longbowzhangchina at gmail.com> wrote:
>>> > Hi,
>>> >
>>> > 1 vtkRenderer is like a container, so you can put several volumes (as
>>> > vtkVolume) into it. No problem.
>>>
>>> Yes,
>>>
>>
>> Alright, good to know.
>>
>>
>>>
>>> >
>>> > 2 I think (not 100% sure) it would be a problem if those volumes are
>>> > intersecting with each other. You can test it easily.
>>> > Just put two vtkVolumes into the scene, and then check the results.
>>>
>>> Intersecting volume would a be problem but having multiple volume
>>> would be fine. You will have to sort them (tell VTK to sort them).
>>>
>>
>> With sort them, you mean set the z order such that they are rendered on
>> top of each other?
>>
>
> Zhang, do you think you could clarify what you meant by "sort them" above,
> and what (visual) consequences doing so would have for the rendering of the
> volumes, assuming the volumes intersect in 3D space.
>
> Elvis
>
>
>> This would be a real problem for us. We are doing x-ray tomography of
>> drill cores. The core breaks into pieces during drilling, so think of each
>> volume I'm speaking of as one of the pieces in the attached photo. Our
>> software will do some algorithmic "puzzling" to align the volumes (pieces)
>> after scanning, but we need to have an interactive way for the user to
>> manually align the pieces as well, for the cases where automatic alignment
>> fails (which it will in some hard/hopeless cases).
>>
>> If VTK can't properly render intersecting volumes, then I'm afraid it
>> will be really hard to make such a tool for manual alignment intuitive to
>> use. The user must be able to see the pieces while rotating them when they
>> are close together, which invariably means they will intersect now and then
>> as he/she tries to fit them together.
>>
>> Is this limitation of VTK present also in 7.0? I've been thinking of
>> compiling a custom VTK 7.0, since I saw it has many improvements to volume
>> rendering, and if it can do composite rendering of intersecting volumes,
>> then we'll definitely do that.
>> Elvis
>>
>>
>>>
>>> - Aashish
>>>
>>> >
>>> >
>>> >
>>> >
>>> > --
>>> > View this message in context:
>>> http://vtk.1045678.n5.nabble.com/Requirements-for-multiple-volumes-in-one-render-window-tp5736847p5736853.html
>>> > Sent from the VTK - Users mailing list archive at Nabble.com.
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>>>
>>>
>>> --
>>> | Aashish Chaudhary
>>> | Technical Leader
>>> | Kitware Inc.
>>> | http://www.kitware.com/company/team/chaudhary.html
>>> _______________________________________________
>>> Powered by www.kitware.com
>>>
>>> Visit other Kitware open-source projects at
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>>> Please keep messages on-topic and check the VTK FAQ at:
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>>
>>
>
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