[vtkusers] In iOS volume rendering can not work in 7.1 and 7.1.1

[Blade Whistler]

Thanks Ken, I will try to find that topic to see if it can resolve my
problem.

Leon

On Fri, Apr 7, 2017 at 2:37 AM, Ken Martin <ken.martin at kitware.com> wrote:

> There is a topic in testing with some fixes for iOS, hopefully that will
> fix the issues you are seeing.
>
> On Mon, Apr 3, 2017 at 2:45 AM, Blade Whistler <bladewhistle at gmail.com>
> wrote:
>
>> Hi
>>
>> I use the volume rendering (VTK 7.0) in iOS for my application. it works
>> well.
>>
>> I'm trying to update to 7.1 or 7.1.1, since in 7.0 I found the clipping
>> is not work in 7.0. An error will occur when compiling the shader, the
>> error is ''<' does not operate on 'float' and 'int' ". I modifed the shader
>> in 'vtkVolumeShaderComposer.h' to make it pass, but the clipping
>> performance is poor.
>>
>> When compiling the 7.1 and 7.1.1 in iOS, the volume rendering is not
>> default enabled, I need to modified in vtkiOS.cmake to make it compile.
>>
>> After compile, when I run volume rendering in iOS, there are still has
>> shader compiling problems. I changed the shader (mostly change the 0 to
>> 0.0) to bypass the error, but see nothing on the screen. It seems in latest
>> version of VTK the volume rendering is not working anymore in iOS.
>>
>>
>> Leon
>>
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>
>
> --
> Ken Martin PhD
> Distinguished Engineer
> Kitware Inc.
> 28 Corporate Drive
> Clifton Park NY 12065
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