[Ves] Bug in computeDisplayToWorld (on iOS)?

[Pat Marion]

Hi Thomas,

Can you write a small example program that demonstrates the issue?

Pat


On Sun, Jun 16, 2013 at 5:33 PM, Thomas H <th6741311 at gmail.com> wrote:

> Hi all,
>
> I believe there is a bug in the computeDisplayToWorld method of
> vesRenderer. To me it appears as if rotation is not taken into account
> properly. If I do the following in VTK, the sphere remains at the same
> position on display after rolling by 90 degrees:
>
> vtkActor *aSphere = vtkActor::New();
> double world[4];
> vtkInteractorObserver::ComputeDisplayToWorld(renderer, 204.408, 199.874,
> 0.660146, world);
>
> aSphere->SetPosition(world[0], world[1], world[2]);
> renderer->GetActiveCamera()->Roll(90);
> vtkInteractorObserver::ComputeDisplayToWorld(renderer, 204.408, 199.874,
> 0.660146, world);
> aSphere->SetPosition(world[0], world[1], world[2]);
>
> The sphere remaining at the same place is the behavior I would expect. If,
> however, I do the same in ves (on iOS), the sphere does not remain at the
> same place, but appears to be rotated by 180 degrees.
>
> Any chance this is a bug? I have trouble explaining this issue
> differently. I'd be happy to post more code (in particular ves code), but I
> am a bit cluess what to post (other than the entire project).
>
> Best,
>
> Thomas
>
>
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