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<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'>I
am very new to VTK, and need to visualize my unstructured points using a grid-
I am trying to use vtkDelaunay3D with the code implemented below- it compiles
fine, but when I execute the program, I get an unhandled exception when I get
to this line of code<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><span
class=GramE><font size=2 face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New"'>shell</span></font></span><font size=2
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'>-><span
class=SpellE>InsertPoint</span>(<span class=SpellE>my_grid</span>, <span
class=SpellE>startPoints</span>, <span class=SpellE>jj</span>, <span
class=SpellE>current_point</span>, unused);<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'>when
looking at the data attributes of unused its “Ids” value is “error:
expression cannot be evaluated”- I assume I am trying to access memory
somewhere that has not been initialized…but I really don’t have
much of an idea what to do to fix it.<span style='mso-spacerun:yes'>
</span>Any thoughts what on what I am doing wrong? Thanks in advance,<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'>Todd
Schneider<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><span
class=SpellE><span class=GramE><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>vtkUnstructuredGrid</span></font></span></span><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'>
*<span class=SpellE>my_grid</span> = <span class=SpellE>vtkUnstructuredGrid::New</span>();<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><span
style='mso-spacerun:yes'> </span>vtkDelaunay3D *shell =
vtkDelaunay3D::<span class=GramE>New(</span>);<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><span
style='mso-spacerun:yes'> </span><o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><span
style='mso-spacerun:yes'> </span><span class=SpellE>my_grid</span>
= shell-><span class=SpellE><span class=GramE>InitPointInsertion</span></span><span
class=GramE>(</span>center, <span class=SpellE>box_length</span>, points-><span
class=SpellE>GetNumberOfPoints</span>(), points);<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><span
style='mso-tab-count:1'> </span><span
style='mso-spacerun:yes'> </span><font color=green><span style='color:
green'>//new <span class=SpellE>idlist</span> needed to store unused <span
class=GramE>hole</span> tetras<o:p></o:p></span></font></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><span
style='mso-tab-count:1'> </span><span
style='mso-spacerun:yes'> </span><span class=SpellE><span class=GramE>vtkIdList</span></span>
*unused = <span class=SpellE>vtkIdList::New</span>();<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><span
style='mso-tab-count:1'> </span><span
style='mso-spacerun:yes'> </span><span class=GramE><font color=blue><span
style='color:blue'>float</span></font></span> <span class=SpellE>current_point</span>[3];<span
style='mso-tab-count:1'> </span><o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><span
style='mso-tab-count:1'> </span><span
style='mso-spacerun:yes'> </span><span class=GramE><font color=blue><span
style='color:blue'>for</span></font>(</span><span class=SpellE><font
color=blue><span style='color:blue'>int</span></font></span> <span
class=SpellE>jj</span> = 0; <span class=SpellE>jj</span> < points-><span
class=SpellE>GetNumberOfPoints</span>(); ++<span class=SpellE>jj</span>)<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><span
style='mso-tab-count:1'> </span>{<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><span
style='mso-tab-count:2'> </span><o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><span
style='mso-tab-count:2'> </span><span
class=GramE>points</span>-><span class=SpellE>GetPoint</span>(<span
class=SpellE>jj</span>, <span class=SpellE>current_point</span>);<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><span
style='mso-tab-count:2'> </span><span
class=GramE>shell</span>-><span class=SpellE>InsertPoint</span>(<span
class=SpellE>my_grid</span>, points, <span class=SpellE>jj</span>, <span
class=SpellE>current_point</span>, unused);<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><span
style='mso-tab-count:1'> </span>}<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New"'><span style='mso-tab-count:1'> </span><span
class=GramE>shell</span>-><span class=SpellE>EndPointInsertion</span>();</span></font><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></p>
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