[vtkusers] problems with vtkCamera

[John Drescher]

On Tue, Mar 6, 2012 at 9:49 AM, Brenno Ribeiro <brennobr at gmail.com> wrote:
> I'm trying so see a dicom image using vtkCamera but i'm having the following
> problems:
> - I needed to correct the position of the image that was showed by the
> camera rotating from the axes x and y. To do it i used "cam->SetViewUp(0,
> -1, 0);" and "cam->Azimuth(180);" and i got my goal but the problem is that
> i only can see the right form after an interaction from the window from the
> image or clicking in it or going to other window and go back to the image.
> Why it?

I would use

cam->setViewUp(-1,-1,0);

Or at least that worked with the lung ct slice that I picked. When you
click in this window the image gets rotated. The reason is this is the
default behavior of the default window interactor. I usually override
vtkInteractorStyleImage and disable the features I do not want.

John



> - To correct the colors of the image i used the RescaleFilterType. It works
> very well without the camera but if i use the camera the filter it doesn't
> work and i have only some lines that are forming the image. Why?
>

You do not seem  to be displaying the dicom image with the code you
posted. You are displaying the result of your contour filter but not
the input image.

John