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<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'>Hi,</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>One can currently access the internal data pointer of a
vtkFloatArray instance using :</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>float * ptr = fArray->GetPointer (0);</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>How can I delete the array instance (with
fArray->Delete() ) without losing the raw data array and without having to
copy it ? Zero-copy data passing is an important issue for me since I deal with
large 3D data sets …</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thank you very much for your help.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoAutoSig style='margin:0cm;margin-bottom:.0001pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>Khaldoun.</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=FR-CA
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>PS : The only way to access the ‘SaveUserArray’
attribute is through the </span></font><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>vtkFloatArray::SetArray() method. A
workaround would have been to do the following :</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>float * ptr = fArray->GetPointer (0);</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>fArray->SetArray (ptr, size, 1);</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>hoping that the last instruction would modify the </span></font>SaveUserArray
and prevent the deletion of the data pointer. Unfortunately the <font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>SetArray method
deletes the data array prior to changing the </span></font>SaveUserArray
attribute !! Is there a simpler way than inheriting from <font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>vtkFloatArray and
adding an accessor on the </span></font>SaveUserArray attribute ?</p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
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