[vtkusers] Re: vtkimageActor mouse picking and picked position

[nora mohamedi]

thanks for your reply but i didn't help
I need to pick an image inside a vtkRenderwindow, I can get the position of the picked point inside the vtkRenderwindow but not its coordinates inside the rendrer image.
I want to know how to get a vtkimageactor position inside a vtkRenderWindow. So far I can get the mouse position  inside the vtkRenderWindow but not the corresponding pixel coordinates of the vtkImageactor displayed inside the vtkImageActor.
Please could anyone send a code that is already used or help on this issue
Thanks

Goodwin Lawlor <goodwin.lawlor at ucd.ie> wrote:
Have a look here: http://www.vtk.org/Wiki/VTK_Mouse_Picking

Please add to it if you get any further ideas.

hth

Goodwin

"nora mohamedi" wrote in message
news:20040901141526.86236.qmail at web60906.mail.yahoo.com...
Hi,
I am newbie at vtk and in my application, I need to display an MRI image and
interact with the mouse on it to draw on it. So far I can display the Image,
I can pick it with the mouse but I don't know how to get the 2D coordinates
of the picked position in the image domain. I can only get the position
using " GetLastEventPosition" but inside the render window and not the image
itself. Could anyone help on this matter ?
thanks


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