[vtkusers] interpolation of a points set by splines

[Renaud Isabelle]

Hi,
 
I'm drawing a circle wherever the user clicks on my image. 
 
Now, I would like an interpolation line to be drawn between each point of my glyph. I take a look on that and see that I can use vtkCardinalSpline. 
 
- What I don't know to do is to interpolate my points in the mean time that the users clicks: my spline has to length itself and to be reevaluated after each click.
 
- vtkSplineFilter is also mentioned and maybe this could help me. However, I didn't find any example of this filter, except test file. Has anyone already used this filter?
 
- Does someone know how I could handle all of this, while being interactive with the user. 
All examples that I read so far deal with vtkPolyData set once and not increasing with user clicks.
 
Please give me any idea.
 
Isabelle 

		
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