[vtkusers] selecting points

[Boehm, Lukas]

No, a rectangular picking region is unfortunately not enough. The user
really needs to define any polygon with n corners. 

Would you recommend to simply draw a polygon with corners at every
single click position? When the user has finished this action, I could
use some algorithms to find the points
(http://en.wikipedia.org/wiki/Point_in_polygon). 

Or is there any other way to solve this problem?

Thank you for your answer!
Lukas

-----Original Message-----
From: David Doria [mailto:daviddoria at gmail.com] 
Sent: Montag, 19. Dezember 2011 13:54
To: Boehm, Lukas
Cc: vtkusers at vtk.org
Subject: Re: [vtkusers] selecting points

2011/12/19 Boehm, Lukas <Lukas.Boehm at cellent.de>:
> Hello,
>
>
>
> I am plotting some points via vtkPoints class. Now I want to select 
> some points by defining a polygon. Every point which is inside the 
> polygon, should be selected.
>
>
>
> My first step was to draw with every single click one point and 
> connect the point with the last point. But now I found the area picker

> and it sounds like this is a built-in solution.
>
>
>
> Before I am investing more time in one of the solutions, my question 
> is: Is the area picker the solution for this problem?
>
>
>
> Thank you very much!
>
> Lukas

According to the documentation AreaPicker uses a rectangular picking
region. Do you need a more general polygon?

David
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