[vtkusers] Pick an actor

[Philipp Hartl]

Hi,

for mouse picking you can start here
http://www.vtk.org/Wiki/VTK_Mouse_Picking

VTK is using a pipeline for visualizing the geometric primitives and
more, so you have to enclose each object you want to pick in a separated
pipeline by a vtkActor. (e.g. vtkPolyData ... -> vtkActor,
vtkUnstructeredGrid ... -> vtkActor, and so on) Each actor can be
picked, certainly if it is added to the rendering pipeline and visible.

Cheers,
Philipp

polys_poly at hotmail.com schrieb:
> Hello,
>  
> this is what i am currently doing. I have created an application in C++ 
> where i render a DICOM dataset. I also have some text files and each 
> one contains a set of coordinates that form a polygon. With the rendered 
> volume i also render the polygons (vtkActor). What i want to do is add 
> to the application the functionality of selecting these polygons-actors. 
> For example the user moves the mouse pointer on top of a polygon. He 
> then presses "p" or another button, and the actor is picked so he can 
> view the polygon's surface area.
>  
> If anyone has an example in C++ that does more or less what i wanna do 
> or can give me some tips i would be really grateful since i need to do 
> this asap and have no experience at all in observers, pickers, events 
> etc!!!!
>  
> Thanks in advance
>  
> 
> 
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