[osg-users] kd-Tree LineIntersection speedUp

Adrian Egli 3dhelp at gmail.com
Mon Oct 29 01:37:57 PDT 2007


Hi Jean-Seb,

2007/10/24, Jean-Sébastien Guay <jean-sebastien.guay at polymtl.ca>:
>
> Hello Adrian,
>
> > i am working on a really general and fast implementation for reduce the
> > number of triangles checked against a line in LineSegement Intersection
> > Test.
> > May question coming up while reviewing the OSG core implementation, i am
> not
> > yet sure how and where i should implement this new feature. The current
> > implementation of KD-Tree is quite fast and could be included into the
> osg
> > core. are there some experience in line segement boosting?
>
> I would very much like to use your contribution, however it does not
> seem Robert has time to guide you in integrating it for now. It would
> therefore be very kind if you could help make it usable without
> integrating it into the Core OSG.



greate

The code as it stands does not currently support transforms. Can you
> help with that? I have never personally implemented a kd-tree
> algorithm, so I do not know where this support of transforms needs to
> be put in.


correct, but when we have integrated it into the core of osg, then it should
work as expected.


I would really appreciate your help with this since in an example use
> case, my current implementation with LineSegmentIntersector takes
> about 2 minutes and with your kd-tree it takes about 11 seconds (with
> bad results, but still promising).


:-)

Thanks in advance,
>
> J-S
> --
> ______________________________________________________
> Jean-Sebastien Guay     jean-sebastien.guay at polymtl.ca
>                          http://whitestar02.webhop.org/
>
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-- 
********************************************
Adrian Egli
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