[vtkusers] rotating a 2D actor

[Pankaj Daga]

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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