<div class="gmail_quote">2009/9/9 Murat Aydın <span dir="ltr"><<a href="mailto:murat.aydin@netcad.com.tr">murat.aydin@netcad.com.tr</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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<div><font face="Arial" size="2">Hi,</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">I am calculating volume of solid constructed by
vtkDelaunay3D applied to a point cloud.</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">i am using vtkGeometryFilter ->
vtkTriangleFilter -> vtkMassProperties in order to get volume of the solid.</font></div></div></blockquote><div><br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div bgcolor="#ffffff"><div><font face="Arial" size="2"> I
am not sure whether the calculated volume is correct,</font></div></div></blockquote><div><br>No issues AFAIK.<br> <br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div bgcolor="#ffffff"><div><font face="Arial" size="2"> because if i
add</font></div>
<div><font size="2"><font face="Arial">vtkDecimatePro filter or
vtkSmoothPolyDataFilter the volume changes.</font></font></div></div></blockquote><div><br>It is certainly going to change a bit. The locations of the points comprising the polydata are going to change due to smoothing and this is going to impact the projected volume.<br>
</div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div bgcolor="#ffffff"><div><font size="2"><font face="Arial"> Without vtkDecimatePro , the volume
seems to be more than it should be.What should i do to find true volume? Thanks
in advance.</font></font></div></div></blockquote><div><br>How do you arrive at that conclusion. Please take a look at the paper referenced in the header.<br><br>At most there may be numerical issues with computing the projected volume of axis aligned triangles. The filter alleviates this by computing the volume along the three axes and averaging them. <br>
<br></div></div><br clear="all"><br>-- <br>karthik<br>