Pick point on vtkPlane

[superzz]

Hello
I am developping a volume rendering program.

I'm using vtkInteractorStyleTrackballCamera as InteractorStyle and vtkPlane to cut volume. When user click the screen, my program needs to calculate and output the 3D intersection point to vtkPlane.

I know how to do this in my XNA/directX program, but not familiar with the corresponding API of VTK. Googled for more than 3 hours but finally failed to find out what API should be used. Please help me.

Thanks

superZz

[David Doria-2]

On Fri, Nov 6, 2009 at 8:53 AM, superzz <jxdw_zlf@...> wrote:

Hello
I am developping a volume rendering program.

I'm using vtkInteractorStyleTrackballCamera as InteractorStyle and vtkPlane
to cut volume. When user click the screen, my program needs to calculate and
output the 3D intersection point to vtkPlane.

I know how to do this in my XNA/directX program, but not familiar with the
corresponding API of VTK. Googled for more than 3 hours but finally failed
to find out what API should be used. Please help me.

Thanks

superZz

This is a very good question. I believe you have to add an observer or something? Here is the shell of an example of this: http://www.vtk.org/Wiki/Plane_Picking

Can anyone make it output the coordinates of the point that is clicked?

Thanks,

David
 

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[Anka Kochanowska-2]

Hi!
Maybe this explanation written by Mark Wyszomierski (thanks Mark!) could help:
http://devsample.org/index.php?option=com_content&task=view&id=48&Itemid=27
Anka

On Fri, Nov 6, 2009 at 9:17 AM, David Doria <daviddoria%2Bvtk@...> wrote:

On Fri, Nov 6, 2009 at 8:53 AM, superzz <jxdw_zlf@...> wrote:

Hello
I am developping a volume rendering program.

I'm using vtkInteractorStyleTrackballCamera as InteractorStyle and vtkPlane
to cut volume. When user click the screen, my program needs to calculate and
output the 3D intersection point to vtkPlane.

I know how to do this in my XNA/directX program, but not familiar with the
corresponding API of VTK. Googled for more than 3 hours but finally failed
to find out what API should be used. Please help me.

Thanks

superZz

This is a very good question. I believe you have to add an observer or something? Here is the shell of an example of this: http://www.vtk.org/Wiki/Plane_Picking

Can anyone make it output the coordinates of the point that is clicked?

Thanks,

David
 

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[superzz]

Thanks. It seems that it is helpful. I will try it and will post here if the problem is fixed. Thanks again.

David Doria-2 wrote:

On Fri, Nov 6, 2009 at 8:53 AM, superzz <[e-mail]> wrote:

>
> Hello
> I am developping a volume rendering program.
>
> I'm using vtkInteractorStyleTrackballCamera as InteractorStyle and vtkPlane
> to cut volume. When user click the screen, my program needs to calculate
> and
> output the 3D intersection point to vtkPlane.
>
> I know how to do this in my XNA/directX program, but not familiar with the
> corresponding API of VTK. Googled for more than 3 hours but finally failed
> to find out what API should be used. Please help me.
>
> Thanks
>
> superZz
>

This is a very good question. I believe you have to add an observer or
something? Here is the shell of an example of this:
http://www.vtk.org/Wiki/Plane_Picking

Can anyone make it output the coordinates of the point that is clicked?

Thanks,

David

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