[vtkusers] VTK 7.1.1 iOS build

[Ken Martin]

The nightly iOS build is off VTK master and I know the examples have been
tested fairly recently so that may be the way to go. I know folks are using
it on an iOS based project so maybe give master a shot.

On Wed, May 24, 2017 at 9:58 AM, Brooksby, Glen W (GE Global Research, US) <
brooksby at ge.com> wrote:

> Thanks again Ken.  I agree that ES2 should be removed because it is not
> only present, but it’s the default.
>
> However, the 7.1.1 iOS build is still broken.
>
>
>
> The problems are indicated in this stackoverflow
> <https://stackoverflow.com/questions/41001334/missing-opengl-extension-items-when-compiling-vtk-for-ios>
> post from December.  I see from the current master branch that the misnamed
> variable ‘multisample’ has been fixed by changing to ‘multisampling’.
> Simple enough.  However, there is still the issue of GL_MULTISAMPLE being
> undefined.
>
>
>
> I can see it is defined in the following files:
>
>
>
> ThirdParty/glew/vtkglew/include/GL/glew.h
>
> Utilities/ParseOGLExt/headers/GL3/gl3.h
>
> Utilities/ParseOGLExt/headers/glext.h
>
>
>
> but with it in 3 locations I can’t tell how it is supposed to properly
> make its way into the Rendering/OpenGL2/*.
>
>
>
> Is your working build from the master branch?  I’m wondering if I should
> abandon hope with 7.1.1 and go to 8.x.
>
>
>
> Suggestions?
>
>
>
> Glen
>
>
>
> *From:* Ken Martin [mailto:ken.martin at kitware.com]
> *Sent:* Wednesday, May 24, 2017 8:06 AM
> *To:* Brooksby, Glen W (GE Global Research, US) <brooksby at ge.com>
> *Cc:* vtkusers at vtk.org
> *Subject:* EXT: Re: [vtkusers] VTK 7.1.1 iOS build
>
>
>
> We no longer support ES2 (I should remove that option) so ES3 is
> definitely a good step.
>
>
>
> On Tue, May 23, 2017 at 5:03 PM, Brooksby, Glen W (GE Global Research, US)
> <brooksby at ge.com> wrote:
>
> Thanks for the prompt reply Ken.  I’ll give it another go.  The only
> difference I see between your build and mine is OPENGL_ES_VERSION=3.0, and
> BUILD_EXAMPLES=ON, whereas I had ES=2.0 and examples off. I’ll make the
> change and see what happens.
>
>
>
> Glen
>
>
>
> *From:* Ken Martin [mailto:ken.martin at kitware.com]
> *Sent:* Tuesday, May 23, 2017 3:58 PM
> *To:* Brooksby, Glen W (GE Global Research, US) <brooksby at ge.com>
> *Cc:* vtkusers at vtk.org
> *Subject:* EXT: Re: [vtkusers] VTK 7.1.1 iOS build
>
>
>
> The ios build of VTK starts at the top where it sets up subdirectories and
> then recursively calls cmake on VTK for those subdirectories with specific
> options. So the return at the top is correct. When the build process is
> building the subdirectories it will process that same file with different
> settings where it will get to those later if statements.
>
>
>
> Also you can look at
>
>
>
> https://open.cdash.org/viewNotes.php?buildid=4909344
>
>
>
> which shows how the nightly dashboard is setup for iOS.
>
>
>
>
>
> Hope that helps!
>
> Ken
>
>
>
> On Tue, May 23, 2017 at 3:38 PM, Brooksby, Glen W (GE Global Research, US)
> <brooksby at ge.com> wrote:
>
> I’m attempting to build VTK (v7.1.1) for iOS and I’ve run into problems.
> In looking at the top level CMakeLists.txt file I see a stanza that says:
>
>
>
> option(VTK_IOS_BUILD "Build vtk.framework for iOS" OFF)
>
> if (VTK_IOS_BUILD)
>
>   include(vtkiOS)
>
>   return()
>
> endif()
>
>
>
> The only instructions I see for building VTK for iOS are here
> <https://blog.kitware.com/building-vtk-for-mobile-architectures/>. These
> instructions say to set VTK_IOS_BUILD=ON and a few other variables.
>
> However, if VTK_IOS_BUILD=ON, the stanza above causes CMake to “return”,
> or quit processing the top-level CMakeLists.txt file.  Yet further down in
> the same CMakeLists.txt file I see:
>
>
>
> if (ANDROID OR APPLE_IOS) …
>
>
>
> and
>
>
>
> if (APPLE_IOS)…
>
>
>
> These two conditionals seem to be targeting iOS, but will never be reached
> if VTK_IOS_BUILD=ON.  I see nowhere where APPLE_IOS is set, nor
> instructions to set it.
>
>
>
> For my case I changed the first stanza to:
>
>
>
> option(VTK_IOS_BUILD "Build vtk.framework for iOS" OFF)
>
> if (VTK_IOS_BUILD)
>
> include(vtkiOS)
>
> SET (APPLE_IOS 1)
>
>   #return()
>
> endif()
>
>
>
> Configure, generate, and the build seems to get much further, but the
> build still breaks when building for the simulator (in vtkGL2PSExporter.cxx
> because it’s not finding vtk_gl2ps.h).
>
>
>
> A framework is produced, but it appears to be incomplete.  Specifically,
> vtkInteractorStyleMultiTouchCamera.h is not included, which may be caused
> by APPLE_IOS being set.  Because of this the iOS example GLPaint cannot
> be built.
>
>
>
> Is there anyone who is having success building VTK 7.1.1 for iOS who can
> shed some light on this or provide more thorough instructions? Would a
> different version have more success?  A VTK Framework does appear to have
> been produced.
>
>
>
> For reference I’m building VTK 7.1.1, using CMake version 3.8.0.  I’m
> building on a Macbook air running MacOS 10.12.4 (Sierra), with Xcode 8.3.1.
>
>
>
> Thanks,
>
>
>
> Glen Brooksby
>
>
>
>
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>
> --
>
> Ken Martin PhD
>
> Distinguished Engineer
> Kitware Inc.
>
> 28 Corporate Drive
> Clifton Park NY 12065
>
>
>
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>
>
> --
>
> Ken Martin PhD
>
> Distinguished Engineer
> Kitware Inc.
>
> 28 Corporate Drive
> Clifton Park NY 12065
>
>
>
> This communication, including all attachments, contains confidential and
> legally privileged information, and it is intended only for the use of the
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-- 
Ken Martin PhD
Distinguished Engineer
Kitware Inc.
28 Corporate Drive
Clifton Park NY 12065

This communication, including all attachments, contains confidential and
legally privileged information, and it is intended only for the use of the
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