[osg-users] [Help] OSG + ArKit: Problem converting coordinate system

[Voerman, L.]

Hi  Rodrigo,
I don't fully grasp your question, but i noticed that you say you want to
swap axis while the matrix in ar_conv_values_change_120.jpeg
<http://forum.openscenegraph.org//files/ar_conv_values_change_120.jpeg> has
a last column in a different order than the first three.
Laurens.

On Tue, Oct 9, 2018 at 9:06 AM Raymond de Vries <reedevee at gmail.com> wrote:

> Hi Rodrigo,
>
> Without having read your mail in detail I have a suggestion. Do you know
> artoolkit and the integration with osg? It sounds to me that you can
> learn from that project.
>
> https://github.com/artoolkit/artoolkit5
> https://github.com/artoolkit/artoolkit5/tree/master/examples/simpleOSG
>
> Please keep us/me posted. Sounds like a nice project, have fun!
>
> Cheers,
> Raymond
>
>
>
>
> On 10/8/2018 9:08 PM, Rodrigo Brayner Lyra wrote:
> > Hi,
> >
> > I'm working on a project that will render a scene using openscenegraph,
> and the user will have the option to work with this scene in AR. The
> integration of ArKit in the application is almost complete, except in the
> conversion of ArKit's view matrix to the coordinate system used by OSG.
> >
> > I uploaded the render of the OSG axis helper and the ArKit axis helper.
> As you can see, the y in OSG is x in ArKit, the x in OSG is z in ArKit and
> the z in OSG is y in ArKit. With that, I thought that if I switched the
> axes directly into the view matrix it would be correct. What I have tried
> can be seen in the two attachments with the code fragment that converts the
> ArKit view matrix into an OSG view matrix (ar_conv_vector_change and
> ar_conv_values_change).
> > None of them worked completely except that one of them was correct in
> the rotations and translations of the camera, but the position and initial
> rotation of the scene was completely wrong (The wall should be in the same
> position and point of view as before at the time that the AR mode is
> started, but was positioned as shown in the switched_values_view image).
> >
> > In the end, the camera view matrix is:
> > m_camera_matrix = m_camera_view * ar_view_matrix;
> >
> > I apologize for the long text, and I ask the support of the people of
> this forum, and if there is, who has already gone through this situation
> (with ArKit or other APIs)
> >
> > Thank you!
> >
> > Cheers,
> > Rodrigo
> >
> > ------------------
> > Read this topic online here:
> > http://forum.openscenegraph.org/viewtopic.php?p=75048#75048
> >
> >
> >
> >
> > Attachments:
> > http://forum.openscenegraph.org//files/switched_values_view_100.jpg
> > http://forum.openscenegraph.org//files/ar_conv_values_change_120.jpeg
> > http://forum.openscenegraph.org//files/ar_conv_vector_change_297.jpeg
> > http://forum.openscenegraph.org//files/osg_axis_731.png
> > http://forum.openscenegraph.org//files/arkit_axis_176.jpg
> >
> >
> > _______________________________________________
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> > osg-users at lists.openscenegraph.org
> >
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
> >
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>
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