<div dir="ltr">Hi thanks for you comments. I must admit though I don't actually think this does what I need in particular the removal of points. Thanks anyway though. Does anybody else have other comments?<div><br></div>
<div>Cheers,</div><div>Andy</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On 13 November 2013 15:07, Marcelino Rodriguez Cancio <span dir="ltr"><<a href="mailto:marcelinorc@uclv.edu.cu" target="_blank">marcelinorc@uclv.edu.cu</a>></span> wrote:<br>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">You may use vtkPointSet to achieve most of your needs<u></u><u></u></span></p><div class="im">
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">>></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif""> able to add individual points at random<u></u><u></u></span></p>
</div><p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">vtkPointSet::</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><a><span lang="EN-US">GetPoints</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">()</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">::InsertNextPoint()</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">
and call for each point you want to add.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif""><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Also, you may
</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">call<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif""><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">vtkPointSet::</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><a><span lang="EN-US">GetPoints</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">()</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">::SetNumberOfPoints()
to specify the number of points and then set each point using vtkPointSet::GetPoints()::</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><a><span lang="EN-US">SetPoint()</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif""><u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif""><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif""><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">>>want it to be able to detect if the point is already contained<u></u><u></u></span></p>
</div><p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">vtkPointSet::</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><a><span lang="EN-US">FindPoint</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif""><u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif""><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">-- I need access to the underlying data for an external programme<u></u><u></u></span></p>
</div><p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">vtkPointSet::</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><a><span lang="EN-US">GetPoint</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">s()::GetPoint(</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">pointid</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">)</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">
<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif""><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif""><a><span style="color:windowtext;text-decoration:none">--Finally,
and most importantly, I want to be able to delete points</span></a><u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">vtkPointSet::</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><a><span lang="EN-US">GetPoint</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">s()::GetData().RemoveTuple(</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">pointid</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">)<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif""> <u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">--</span><span lang="EN-US">
</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif""> So deletion should not re-number the point ids once a point is removed.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">I owe you that, unfortunately I think vtkIdType is just an index rather than a key.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></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""> <a href="mailto:vtkusers-bounces@vtk.org" target="_blank">vtkusers-bounces@vtk.org</a> [mailto:<a href="mailto:vtkusers-bounces@vtk.org" target="_blank">vtkusers-bounces@vtk.org</a>]
<b>On Behalf Of </b>Andrew Parker<br>
<b>Sent:</b> miércoles, 13 de noviembre de 2013 8:27<br>
<b>To:</b> <a href="mailto:vtkusers@vtk.org" target="_blank">vtkusers@vtk.org</a><br>
<b>Subject:</b> [vtkusers] Point addition and removal data structure<u></u><u></u></span></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">All, <u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">I am looking for a vtk data structure with the following requirements:<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">-- I want to be able to add individual points at random, rather than construct the data structure from a point list. When the point is added I want the id of the point added returned<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">-- I want it to be able to detect if the point is already contained, and if so return the id of the contained point, else the newly added id - so strongly enforce no duplication. I would prefer a very tight tolerance for duplicate point
detection.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">-- I need access to the underlying data for an external programme, so I'm hoping that they're stored as x_y_x for point 0 and then x_y_z for point 1 etc. I can live without this, but would prefer access to contiguous underlying storage.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">-- Finally, and most importantly, I want to be able to delete points, without it invalidating previously returned id's for other points that remain after deletion. So deletion should not re-number the point ids once a point is removed.
It should also not be an overly costly process to delete, as this is likely to happen just as frequently as addition. I would prefer deletion over contiguous point storage, so if I have to sacrifice one then it would be the above requirement rather than
this one.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">I thought I had most of the above with vtkMergePoints, but I don't think I can remove points with that data structure? Or at least I couldn't figure that out?<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Can anybody recommend anything in vtk that can do all of the above? Or indeed as equally valid confirm that the above cannot all be met currently within vtk?<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Speed and efficiency of both point addition and removal are vital. I only care about 3D points, so not bothered about connectivity of faces/cells etc.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Cheers,<u></u><u></u></p>
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<p class="MsoNormal">Andy<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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