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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Tharindu,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I checked out the code and managed to compile it, but there were a few issues. You included some vtkAxis stuff in the same Gerrit patch which caused build errors
too - so I think a branch with ‘just’ the cell tree stuff on would be cleaner.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Since you’ve used the BSP tree code as a base point, I thought I’d try out some of my own experiments using the CellTreeLocator – I have subclasses of the ModifiedBSPTree
which I have now made subclasses of the CellTreeLocator for tests. Unfortunately, the internal node classes are not visible to subclasses, so I’ve made some significant changes to the interface to expose the CellNode and CellTree internals.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I suspect you’re also making changes, so I had better swap patches with you to see if we can clean up the interface/style etc and test thoroughly.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I have no idea how to use Gerrit yet, (and most of today I’m otherwise engaged), so I’ll put together a patch/branch to send to you later this afternoon.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">JB<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Tharindu De Silva [mailto:tsameera1@gmail.com]
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<b>Sent:</b> 19 July 2011 19:34<br>
<b>To:</b> VTK Developers; Biddiscombe, John A.<br>
<b>Subject:</b> Cell Tree Implementation<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi, <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"> I implemented a class named CellTreeLocator with the algorithm given in paper <span class="apple-style-span"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:white"><a href="http://www.idav.ucdavis.edu/~garth/pdfs/vis10a.pdf" target="_blank"><span style="color:yellow;background:purple">www.idav.ucdavis.edu/~garth/pdfs/vis10a.pdf</span></a> </span></span>.
My implementation can be viewed at gerrit <a href="http://review.source.kitware.com/#change,2127">http://review.source.kitware.com/#change,2127</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"> I used the Visit implementation of the algorithm for the data structures and followed vtkModifiedBSPTree class to write a method to get the intersection with a line. CellLocator2.cxx is used to test it and it passed the initial test,
it is with the name CellLocator2.cxx under the Filtering/Testing/Cxx folder.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"> Some work still needs to be done to bring this implementation to the vtk standards. So I highly appreciate any feedback from you.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"> Please let me know, if there is anything unclear about the code or the algorithm. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thank you,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Regards,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Tharindu De Silva<o:p></o:p></p>
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