Dear Hrvoje,
 indeed it should work for a n-furcation, so this is a bug.
It would be great if you could send me the centerlines (I don't need the model, 
just the centerlines, possibly unsplit).
Let me know if this is possible.
Thanks and best regards

Luca


On Feb 28, 2011, at 8:55 PM, Hrvoje Bogunovic wrote:

> Dear all,
> 
> I sometimes experience the following problem:
> 
> When I have a 3-furcation some downstream branches are missing after running 
> vtkvmtkCenterlineBifurcationVectors i.e. they are not present in the 
> resulting scalar fields.
> 
> 
> To have a better idea of the problem I am attaching the image of branch 
> groupIds which I used as the input.
> 
> In case you don't see the image the tree looks like this (with a bit of ASCII 
> art ;)):
> 0
> |
> 1
> |\
> 2 4
> |
> 9
> |\\
> 6 53
> |
> 7
> |\
> 8 10
> 
> So 1 and 7 are bifurcations and 9 is a trifurcation.
> 
> Then after applying vtkvmtkCenterlineBifurcationVectors I get the following 
> scalar fields in my result:
> BifurcationVectorsOrientation 1 8 int
> 0 1 1 0 1 0 1 1
> GroupIds 1 8 int
> 0 2 4 2 5 6 8 10
> BifurcationGroupIds 1 8 int
> 1 1 1 9 9 7 7 7
> 
> So the trifurcation with groupId=9 lost its downstream branches 6 and 3...and 
> furthermore I cannot recover the topology as branch 6 is the one connecting 
> bifurcations 9 and 7.
> 
> 
> Any ideas why this happens and where can I look for the solution?
> I was assumimg that BIfurcation vectors are applicable in TRIfurcations but 
> that might not be the case, is it?
> 
> 
> Many thanks and Best regards,
> Hrvoje
> <vmtk-groupIds.png>------------------------------------------------------------------------------
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