[vtkusers] Error in vtkOpenGLGPUVolumeRayCastMapper.cxx, continued

[Aashish Chaudhary]

Hi Rick,

Not yet, we were looking into another bug. One of our team member will look
into it and will get back to the mailing list. Thanks for your test script.

Thanks,


On Tue, May 3, 2016 at 6:10 PM, Richard Frank <rickfrank at me.com> wrote:

> Hi,
>
> Were you able to reproduce the issue with LightKit (or the source I posted
> to Dropbox)?
>
>
> I’m hoping to migrate to 7.0 as soon as we can.
>
> Thanks
>
> Rick Frank
>
>  Re: [vtkusers] Error in vtkOpenGLGPUVolumeRayCastMapper.cxx,
> continued
> Message-ID:
> <CAEw35Z-MrTkAXabTc+BQSorXc+urJPFg5A+U04TLMJnyf50HUg at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Thanks Rick for giving us the case for reproducing the error. I will have
> someone look into it.
>
> Thanks,
>
>
>
> Hi,
>
> I was able to isolate?the problem.
>
> We are using vtkLightKit in our application.
>
> Here is a small app that will demonstrate the problem
>
> https://www.dropbox.com/s/crwlm6njmqvdrz4/Source.7z?dl=0
>
>
> But basically all you have to do is:
>
> vtkSmartPointer<vtkLightKit> lightKit =
> vtkSmartPointer<vtkLightKit>::New();
> lightKit->AddLightsToRenderer(ren1);
>
> and render a volume
> and the shader fails to compile.
>
> Can you verify?
>
> Also, while in there the code
>
> this->Impl->ShaderProgram = this->Impl->ShaderCache->ReadyShaderProgram(
> vertexShader.c_str(), fragmentShader.c_str(), "");
> if (!this->Impl->ShaderProgram->GetCompiled())
> {
> vtkErrorMacro("Shader failed to compile");
> }
>
> should be changed to?
> if (this->Impl->ShaderProgram == nullptr ||
> !this->Impl->ShaderProgram->GetCompiled())
> {
>
> }
>
> as?ReadyShaderProgram returns nullptr at least in this case (which causes
> the crash)
>
> Let me ?know if you can repro and, if you fix it I will fetch from git and
> try again.
>
> Thanks!
>
> Rick Frank
>
>


-- 



*| Aashish Chaudhary | Technical Leader         | Kitware Inc.            *
*| http://www.kitware.com/company/team/chaudhary.html
<http://www.kitware.com/company/team/chaudhary.html>*
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