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

Ken Martin ken.martin at kitware.com
Thu Apr 6 14:37:21 EDT 2017


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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