[vtkusers] zoom in on a specific point

[Jonathan Morra]

I've gotten close.  What I do is use my pan method that I wrote which pans
by using vtkCamera.Position and vtkCamera.FocalPoint on the mouse, and then
I zoom in/out at the same time.  That seems to work for me.

On Mon, Nov 22, 2010 at 4:56 AM, Jesús Spí­nola <jspinola at gmail.com> wrote:

> Hi,
>
> I amb also interested in a zoom-to-point behaviour. Have you achieved what
> you were looking for, Jonathan? What has been your approach?
>
> I'm just playing with vtkRenderWindowInteractor::FlyToImage() but it's not
> enough for me by now. It would be great if you can share your improvements
> with the community ;)
>
>
> On Wed, Oct 20, 2010 at 6:54 PM, Jonathan Morra <jonmorra at gmail.com>wrote:
>
>> Thanks, I'll have a look.
>>
>>
>> On Wed, Oct 20, 2010 at 9:53 AM, Jothy <jothybasu at gmail.com> wrote:
>>
>>> I think you should look into vtkInteractorStyleImage source.
>>>
>>> Go to vtk git.
>>>
>>> Jothy
>>>
>>>
>>> On Wed, Oct 20, 2010 at 5:45 PM, Jonathan Morra <jonmorra at gmail.com>wrote:
>>>
>>>> This actually works backwards for me, but I think that's because my
>>>> camera is flipped.  Where is the source for this, I might be able to just
>>>> implement it correctly for me myself.
>>>>
>>>> But this is the idea that I had.
>>>>
>>>>
>>>> On Wed, Oct 20, 2010 at 9:40 AM, Jothy <jothybasu at gmail.com> wrote:
>>>>
>>>>> Click which about which point you wan tot zoom, then press"F" key.
>>>>>
>>>>> Jothy
>>>>>
>>>>> On Wed, Oct 20, 2010 at 5:36 PM, Jonathan Morra <jonmorra at gmail.com>wrote:
>>>>>
>>>>>> I have a vtkImageViewer2 that I wish to zoom in on.  I have applied
>>>>>> the vtkInteractorStyleImage to the image, and I can zoom using the right
>>>>>> mouse button.  However, this always zooms in on the center of the image.
>>>>>>  I'd like to center the zoom on the location that the mouse was initially
>>>>>> clicked on.  Does anyone have an example of how to do this?
>>>>>>
>>>>>> Thanks
>>>>>>
>>>>>> PS I'm working in Java
>>>>>>
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>>>>>
>>>>
>>>
>>
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>
>
> --
> Jesús Spínola
>
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