[vtkusers] rotating a 2D actor

[Pankaj Daga]

Hi guys,

I am trying this idea of using vtkActor and vtkMapper and then converting
the image to an OpenGL texture.

However, I have one problem now... Which vtkMapper based object will
actually work with vtkImageData. The only class that I can see is
vtkImageMapper and that only works with 2D actors.

Thanks,
Pankaj

On 10/2/06, Pankaj Daga <deluded.soul at gmail.com> wrote:
>
> Hi,
>
> That's an idea worth trying. I will definitely give it a shot...
>
> Thanks again,
>
> Pankaj
>
> On 10/2/06, Kalpathi Subramanian < krs at uncc.edu> wrote:
> >
> >  One way to to do this is to make a texture(vtkTexture) out of this
> > image and then map it on to vtkPlaneSource (I think thats right, just
> > use a single quadrilateral). Then that object can be transformed as you
> > please.  The texture is input to the actor (there is a actor
> > method for this)..
> >
> > I have done this long time back..
> >
> >     == krs
> >
> >
> > Pankaj Daga wrote:
> >
> > Hi Kalpathi,
> >
> > Thanks for replying.
> >
> > Basically, I have a PNG imag that I read using vtkPNGReader and display
> > it using vtkActor2D and vtkImageMapper objects. So, I just wanted to do a
> > simple 2D rotation on it.
> >
> > Cheers and thanks,
> >
> > Pankaj
> >
> > On 10/2/06, Kalpathi Subramanian <krs at uncc.edu> wrote:
> > >
> > > Pankaj:
> > >
> > > There is no transformation matrix associated with 2D actors and hence
> > > you cannot transform it (like rotate).. if you
> > > need to transform your objects use vtkActor.  Tell us what object you
> > > need to rotate in your app and we might be
> > > able to offer suggestions.  (again, read the vtk doc for vtkAcor2D you
> > > will see this in the description).
> > >
> > >     == krs
> > >
> > >
> > > Pankaj Daga wrote:
> > >
> > >  Hi there,
> > >
> > > @Tony: I am a bit confused as to how a vtkCubeAxesActor2D fits into this??? Could you elaborate a bit
> > >
> > > Posting my original message again, as the old one is in September thread.
> > >
> > > I have a vtkActor2D object that I wish to rotate. Is there a simple way to
> > >
> > >
> > > rotate it about its center?
> > >
> > > I know all vtkProp3D based objects have built in rotation functions. How can
> > >
> > > I implement something similar in a vtkActor2D?
> > >
> > > Basically, I have a 2D image that I wish to rotate on the screen.
> > >
> > >
> > >
> > > Thanks,
> > >
> > > Pankaj
> > >
> > >  ------------------------------
> > >
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> > >
> > > --
> > > K.R.Subramanian                        Phone: (704) 687-8579
> > > Department of Computer Science         FAX:   (704) 687-3516
> > > UNC Charlotte, Woodward 435E           Email:
> > >
> > > krs at uncc.edu
> > > Charlotte, NC 28223-0001               Web: http://www.cs.uncc.edu/~krs <http://www.cs.uncc.edu/%7Ekrs>
> > >
> > >
> >
> > --
> > K.R.Subramanian                        Phone: (704) 687-8579
> > Department of Computer Science         FAX:   (704) 687-3516
> > UNC Charlotte, Woodward 435E           Email:
> > krs at uncc.edu
> > Charlotte, NC 28223-0001               Web: http://www.cs.uncc.edu/~krs <http://www.cs.uncc.edu/%7Ekrs>
> >
> >
>
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