Eugene, I am pretty sure the community will be interested in this! While I'll need to look into the reader to understand, to get things going, do you have a sample dataset to demonstrate the issue?
Utkarsh On Tue, Jul 5, 2016 at 10:28 AM, Eugene de Villiers <e.devilli...@engys.com> wrote: > Hi, > > > > When importing STL format geometry or similar, where connectivity > information is not implicit in the data structure, it appears that the > connectivity is reconstructed via an octree search. This is very > inefficient when surfaces with large differences in edge length are > imported – we have had a recent case where an STL took 45mins to load. If > the same input geometry is converted to OBJ format via an external tool, > the load time reduces to minutes. > > > > A generally more efficient method is to calculate the distance of each > point from a location outside the point cloud bounding box and then to > bubble-sort the resulting list. Unless you are dealing with a pathological > case your local search neighbourhood of identical distance points will be > small and the algorithm very fast. More complex, multi-origin algorithms > are also possible to counter pathological instances. > > > > I can provide more details and sample code if you are interested. > > > > Best regards, > > > > *Eugene de Villiers* > > *Managing Director* > > e.devilli...@engys.com > > Mob: +44 (0) 77 89748490 > > Tel: +44 (0)20 32393041 (ext. 102) > > Fax: +44 (0)20 33573123 > > [image: logo_red-black_fonts_signature] <http://www.engys.com/> > > > > This message is intended only for the use of the addressee and may contain > information that is privileged, confidential and exempt from disclosure > under applicable law. If the reader of this message is not the intended > recipient, or the employee or agent responsible for delivering the message > to the intended recipient, you are hereby notified that any dissemination, > distribution or copying of this communication is strictly prohibited. If > you have received this e-mail in error, please notify us immediately by > return e-mail and delete this e-mail and all attachments from your system. > > > > > > _______________________________________________ > Powered by www.kitware.com > > Visit other Kitware open-source projects at > http://www.kitware.com/opensource/opensource.html > > Please keep messages on-topic and check the ParaView Wiki at: > http://paraview.org/Wiki/ParaView > > Search the list archives at: http://markmail.org/search/?q=ParaView > > Follow this link to subscribe/unsubscribe: > http://public.kitware.com/mailman/listinfo/paraview > >
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