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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hi Wagner,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>dummyCoords (pcoords method parameter)
needs to be passed<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>through the calling window but you
don’t need to use it. Another<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>way to calculate xyz coords (for example,
x):<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>double* spacing </span></font>=
m_ImageData->GetSpacing();<o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>double* origin </span></font>=
m_ImageData->GetOrigin();<o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>x = m_coords[0]*spacing[0] + origin[0];<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>although the method below should work.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Dean<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hi Dean,<br>
<br>
My point are defined in int XYZ, which Z are my slice, and XY the simple pixel
coordinate. Are no interpolation here. This points are used to segment, works
fine.<br>
Bu I need to show this points on 3D. The only way that's I know until now are
the celllocation by vtkCell::EvaluateLocation. But are crashing, and I think
are thread problem since this method aren't thread safe. I tried with the
thread safe method too, and are not working. Based on your sugestion, I tried
the second option, which appears to be the correct to my case:<br>
<br>
double dummyCoords[3];<br>
int mCoords[3] = { m_XPosition, m_YPosition, m_ZPosition };<br>
int ret =
m_ImageData->ComputeStructuredCoordinates(viewCordinates, mCoords,
dummyCoords);<br>
if(ret >0 )<br>
{<br>
std::cout << "Point inside.
Coords are: " << viewCordinates[0] << ", " <<
viewCordinates[1] << ", " << viewCordinates[2] <<
endl;<br>
} else {<br>
std::cout << "Point outside of
volume" << endl;<br>
}<br>
<br>
Well, the point are always outside of the volume. dummyCoords ( pcoords method
parameter ) don't needs to be calculated?<br>
<br>
Regards,<br>
<br>
Wagner Sales<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>2008/9/1 Dean Inglis <<a href="mailto:dean.inglis@sympatico.ca">dean.inglis@sympatico.ca</a>><o:p></o:p></span></font></p>
<div link=blue vlink=purple>
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<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Hi
Wagner,</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> </span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>how
are </span></font>m_XPosition, m_YPosition, m_ZPosition defined?<o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> </span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Given
a 3D double precision 3D spatial point:</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> </span></font><o:p></o:p></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>vktIdType
id = m_CurrentImageData->FindPoint(xyzCoords)<o:p></o:p></span></font></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>if(id
> -1)<o:p></o:p></span></font></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>{<o:p></o:p></span></font></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>//do what
you need to do with the point: it's valid!<o:p></o:p></span></font></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>}<o:p></o:p></span></font></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> </span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>if
you have integer ijk indices:</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> </span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>double
queryPoint[3];</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>double
dummyPcoords[3];</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>if(</span></font>m_CurrentImageData->ComputeStructuredCoordinates(queryPoint,myijkindices,dummyPcoords)
== 1)<o:p></o:p></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>{<o:p></o:p></span></font></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>//the ijk
indices refer to a point in the 3D image volume and you have a valid 3D point<o:p></o:p></span></font></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>//otherwise,
try with different ijk indices<o:p></o:p></span></font></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>}<o:p></o:p></span></font></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'> <o:p></o:p></span></font></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>HTH<o:p></o:p></span></font></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>Dean<o:p></o:p></span></font></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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