<div dir="ltr">Thank you Andras for your reply.<div>By the way, do you recommande any other library?</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On 3 July 2017 at 21:55, Andras Lasso <span dir="ltr"><<a href="mailto:lasso@queensu.ca" target="_blank">lasso@queensu.ca</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div lang="EN-US" link="blue" vlink="#954F72">
<div class="m_6117550511760002485x_WordSection1">
<p class="m_6117550511760002485x_MsoNormal">Unfortunately, these Boolean filters in VTK are not reliable. Result mesh contains errors - parts missing, strange shapes are added - maybe in about 10% of the cases, even if triangles are not particularly skinny. By slightly changing
the inputs we sometimes get correct results.</p>
<p class="m_6117550511760002485x_MsoNormal"> </p>
<p class="m_6117550511760002485x_MsoNormal">When we need something that works every time then we convert input meshes to images, perform Boolean operations on images, and convert the resulting image to mesh. Unfortunately, depending on the image resolution, this is a computationally
expensive and somewhat lossy operation.</p>
<p class="m_6117550511760002485x_MsoNormal"> </p>
<p class="m_6117550511760002485x_MsoNormal">Andras</p>
<p class="m_6117550511760002485x_MsoNormal"> </p>
<div style="border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="m_6117550511760002485x_MsoNormal" style="border:none;padding:0in"><b>From: </b><a href="mailto:bill.lorensen@gmail.com" target="_blank">Bill Lorensen</a><br>
<b>Sent: </b>Monday, July 3, 2017 10:55<br>
<b>To: </b><a href="mailto:nabil.bhk@gmail.com" target="_blank">Nabil KHALIFA</a><br>
<b>Cc: </b><a href="mailto:vtkusers@vtk.org" target="_blank">VTK Users</a><br>
<b>Subject: </b>Re: [vtkusers] BooleanOperationPolyDataFilter Problems</p>
</div>
<p class="m_6117550511760002485x_MsoNormal"> </p>
<p class="m_6117550511760002485x_MsoNormal"> </p>
</div>
</div>
<font size="2"><span style="font-size:10pt">
<div class="m_6117550511760002485PlainText"><span class="">Maybe.<br>
<br>
<br>
On Mon, Jul 3, 2017 at 10:54 AM, Nabil KHALIFA <<a href="mailto:nabil.bhk@gmail.com" target="_blank">nabil.bhk@gmail.com</a>> wrote:<br>
> so add new points and remesh could solve it?<br>
><br>
> On 3 July 2017 at 16:41, Bill Lorensen <<a href="mailto:bill.lorensen@gmail.com" target="_blank">bill.lorensen@gmail.com</a>> wrote:<br>
>><br>
>> Please include vtk users mailing list... Also I've changed the subject...<br>
>><br>
>> The gears have lots of long skinny triangles. I suspect this is<br>
>> causing problems with the boolean algorithm.<br>
>><br>
>> Bill<br>
>><br>
>><br>
>><br>
>> On Mon, Jul 3, 2017 at 2:36 AM, Nabil KHALIFA <<a href="mailto:nabil.bhk@gmail.com" target="_blank">nabil.bhk@gmail.com</a>> wrote:<br>
>> > Hi Bill,<br>
>> ><br>
>> > I have a problem about hole filling.<br>
>> > I want to apply boolean operation (subtraction) on meshes using VTK<br>
>> > filter,<br>
>> > but i get an open mesh at the end.<br>
>> > I followed the example in the vtk examples using<br>
>> > BooleanOperationPolyDataFilter<wbr>.<br>
>> > Do you have any idea on how to solve it.<br>
>> > Please find attached my input data and the output.<br>
>> ><br>
>> > Many thanks.<br>
>> ><br>
>> > On 2 July 2017 at 20:00, Bill Lorensen <<a href="mailto:bill.lorensen@gmail.com" target="_blank">bill.lorensen@gmail.com</a>> wrote:<br>
>> >><br>
>> >> IF you see errors or improvemens please follow the procedure here:<br></span>
>> >> <a href="https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Florensen.github.io%2FVTKExamples%2Fsite%2FInstructions%2FForDevelopers%2F&data=02%7C01%7Classo%40queensu.ca%7Cbf27503aaa3f48e8f9c008d4c22399bf%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C0%7C636346905534250463&sdata=7TrWdbqhROVAZ%2FkirfbouGxWHK3ao42xSh78nQ8sSto%3D&reserved=0" target="_blank">
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>> >><br>
>> >> Also, tell all of your friends about the VTK Examples.<br></span>
>> >> <a href="https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Florensen.github.io%2FVTKExamples%2Fsite%2F&data=02%7C01%7Classo%40queensu.ca%7Cbf27503aaa3f48e8f9c008d4c22399bf%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C0%7C636346905534250463&sdata=U6GgNwnVexHn7JpP0uCm8ASB3yveF2KvDKW7ueSZeHQ%3D&reserved=0" target="_blank">
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>> >><br>
>> >><br>
>> >><br>
>> >> On Jul 2, 2017 1:55 PM, "oblakr" <<a href="mailto:2448.rok@gmail.com" target="_blank">2448.rok@gmail.com</a>> wrote:<br>
>> >>><br>
>> >>> Hi,<br>
>> >>><br>
>> >>> this solves my problem. Thank you very much, very appreciated.<br>
>> >>><br>
>> >>> Best regards,<br>
>> >>> Rok<br>
>> >>><br>
>> >>><br>
>> >>><br>
>> >>> --<br>
>> >>> View this message in context:<br>
>> >>><br></span>
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>> >><br>
>> >><br>
>> >> ______________________________<wbr>_________________<br>
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>> >><br>
>> >> Visit other Kitware open-source projects at<br></span>
>> >> <a href="https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.kitware.com%2Fopensource%2Fopensource.html&data=02%7C01%7Classo%40queensu.ca%7Cbf27503aaa3f48e8f9c008d4c22399bf%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C0%7C636346905534250463&sdata=hIDaAaAc5azASvnL3px8RMsZBulWgojg5kYctDjwqI8%3D&reserved=0" target="_blank">
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>> >><br>
>> >> Please keep messages on-topic and check the VTK FAQ at:<br></span>
>> >> <a href="https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.vtk.org%2FWiki%2FVTK_FAQ&data=02%7C01%7Classo%40queensu.ca%7Cbf27503aaa3f48e8f9c008d4c22399bf%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C0%7C636346905534260472&sdata=g6u3xcPxGnENX4VNvfx56kdfVbostNPggk9%2FroN9vSo%3D&reserved=0" target="_blank">
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>> >><br>
>> >> Search the list archives at: <a href="https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmarkmail.org%2Fsearch%2F%3Fq%3Dvtkusers&data=02%7C01%7Classo%40queensu.ca%7Cbf27503aaa3f48e8f9c008d4c22399bf%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C0%7C636346905534260472&sdata=ta72sZ4HGNzvBuhWyGKuEFULbtB%2BLwrP1gSwIY6iPpE%3D&reserved=0" target="_blank">
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>> >><br>
>> >> Follow this link to subscribe/unsubscribe:<br></span>
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>> >><br>
>> ><br>
>> ><br>
>> ><br>
>> > --<br>
>> > Nabil Khalifa<br>
>><br>
>><br>
>><br>
>> --<br>
>> Unpaid intern in BillsBasement at noware dot com<br>
><br>
><br>
><br>
><br>
> --<br>
> Nabil Khalifa<br>
<br>
<br>
<br>
-- <br>
Unpaid intern in BillsBasement at noware dot com<br></span>
______________________________<wbr>_________________<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><font color="#333333" face="proxima-nova-1, proxima-nova-2, Tahoma, Helvetica, Verdana, sans-serif"><span style="font-size:16px">Nabil Khalifa</span></font></div></div>
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