[vtkusers] VTK6 + Java7 on Mac: offscreen rendering?

[Sebastien Jourdain]

Hi Marco,

you will have to use another class. But you will have the same integration
capability.

Look at src/VTK/Wrapping/Java/vtk/sample/rendering/JoglConeRendering.java
for more details.

Seb


On Mon, Sep 9, 2013 at 10:37 AM, Marco Sambin <m.sambin at gmail.com> wrote:

> Hi Seb,
>
> this is great news, and I will give it a try!
> One question: will I be able to keep using vtkCanvas as a Java panel
> class, or rather shall I move to something different?
> Thanks again for your feedback.
>
> Best regards,
>
> Marco Sambin
>
>
>
> On Mon, Sep 9, 2013 at 2:45 PM, Sebastien Jourdain <
> sebastien.jourdain at kitware.com> wrote:
>
>> Hi Marco,
>>
>> you won't be able to rely on offscreen rendering on Mac to properly
>> handle the issue you are trying to overcome.
>>
>> Although, a couple of weeks ago, I've pushed a new set of classes that
>> works on Mac OS X and Java7 (and on the other of the platforms).
>> Those classes rely on JOGL to do the rendering. So if adding JOGL as a
>> dependency is not an issue, you can directly use those.
>>
>> For that you will need to get VTK/master from git and when you build VTK,
>> you will have to turn ON that component. Moreover if you already download
>> JOGL/GLUGEN using maven, CMake should find the appropriate jars for you.
>> Otherwise you will need to specify their paths.
>>
>> Here is the dependency for Maven.
>>
>> +                <dependency>
>> +                    <groupId>org.jogamp.jogl</groupId>
>> +                    <artifactId>jogl-all-main</artifactId>
>> +                    <version>2.0.2</version>
>> +                </dependency>
>> +                <dependency>
>> +                    <groupId>org.jogamp.gluegen</groupId>
>> +                    <artifactId>gluegen-rt-main</artifactId>
>> +                    <version>2.0.2</version>
>> +                </dependency>
>>
>> Hope that could help you,
>>
>> Seb
>>
>>
>>
>> On Mon, Sep 9, 2013 at 7:22 AM, Marco Sambin <m.sambin at gmail.com> wrote:
>>
>>> Dear VTKers,
>>>
>>> I am developing a VTK 6-based Java application, and I am making some
>>> efforts to make it compatible with Mac OS X as well.
>>>
>>> I know that the jawt embedding currently supported by Java 7 on Mac
>>> (which is CALayer-based) does not work with VTK 6 (nor with previous VTK
>>> versions), but there are several portions of my application which do not
>>> use direct drawing by VTK classes to Java panels (i.e., do not use jawt),
>>> hence will work fine on Mac + Java 7 as well.
>>>
>>> Now, for the portions of my application where VTK classes need to
>>> actually "draw", my question is: will offscreen rendering work on Mac? The
>>> basic idea would be to grab the output of the offscreen rendering, convert
>>> it to a Java-compatible image, and draw it to a Java panel. I know this
>>> will be a significant performance penalty, but my requirements in this
>>> moment are not so strict or demanding under this point of view.
>>>
>>> In particular, I have a vtkCanvas-derived panel, where I display some
>>> planes in 3D (actually, they are vtkImagePlaneWidgets, but I am mainly
>>> interested in the "display" functionality, not in the interactivity of the
>>> widget with the user). Will it be sufficient to call
>>> myVtkCanvas.GetRenderWindow().SetOffScreenRendering(1) to obtain offscreen
>>> rendering on my Mac? Or it is more complicated than that?
>>>
>>> Currently, calling just
>>> myVtkCanvas.GetRenderWindow().SetOffScreenRendering(1), I am obtaining a
>>> crash in the OpenGL library when running my application on the Mac.
>>>
>>> Thanks in advance for your feedback.
>>>
>>> Best regards,
>>>
>>> Marco
>>>
>>>
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>
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