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<DIV><SPAN class=616330015-09112004><FONT color=#800000 size=2>I can think of
several ways to do this, but the most straightforward way is probably to attach
an observer to the render window start event that checks the render windows
desired update rate and sets the LOD accordingly. The code could look
something like this (I'm free handing so apologies if I make
errors.)</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2>// Declaration of callback function.</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2>static void SelectLODCallback(vtkObject *__renwin, unsigned long, void
*__prop)</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2>{</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2> vtkRenderWindow *renwin = static_cast<vtkRenderWindow
*>(__renwin);</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2> vtkLODProp3D *prop = static_cast<vtkLODProp3D
*>(__prop);</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2> if (renwin->GetDesiredUpdateRate() >
5.0)</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2> {</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2> // Set low LOD in prop.</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2> }</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2> else</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2> {</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2> // Set high LOD in prop.</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2> }</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2>}</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2>...</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2>// Code to set up the observer. Assumes renwin is a vtkRenderWindow
and prop</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2>// is the vtkLODProp3D you want to control.</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2>vtkCallbackCommand *cbc = vtkCallbackCommand::New();</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2>cbc->SetClientData(prop);</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2>cbc->SetCallback(SelectLODCallback);</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2>renwin->AddObserver(vtkCommand::StartEvent, cbc);</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2>cbc->Delete(); // Won't actually delete since renwin
holds a reference.</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=616330015-09112004><FONT color=#800000 size=2>That's basically
be all you need. The render window interactor holds two update rates
(DesiredUpdateRate and StillUpdateRate) and should set the render window's
DesiredUpdateRate to one of these two depending on whether interaction is
happening.</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT color=#800000
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=616330015-09112004><FONT color=#800000
size=2>-Ken</FONT></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=616330015-09112004><!-- Converted from text/plain format -->
<P><FONT face="Courier New" color=#800000 size=2>
**** Kenneth Moreland<BR>
*** Sandia National
Laboratories<BR>*********** <BR>*** *** *** email:
kmorel@sandia.gov<BR>** *** ** phone: (505)
844-8919<BR> ***
fax: (505) 844-0833<BR></FONT></P></SPAN></DIV>
<DIV><SPAN class=616330015-09112004><FONT face="Courier New" color=#800000
size=2></FONT></SPAN> </DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #800000 2px solid; MARGIN-RIGHT: 0px">
<DIV></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B>
vtkusers-bounces@vtk.org [mailto:vtkusers-bounces@vtk.org] <B>On Behalf Of
</B>Massimo Ivani<BR><B>Sent:</B> Tuesday, November 09, 2004 6:57
AM<BR><B>To:</B> vtkusers@vtk.org<BR><B>Subject:</B> [vtkusers] vtkLODActor
and mouse interaction<BR><BR></FONT></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Hello <SPAN
class=SpellE>vtk</SPAN> <SPAN
class=SpellE>Users</SPAN>,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: EN-GB">I have
to show medical data using <SPAN class=SpellE>vtk</SPAN>. I use vtkLODProp3D
to add different LOD volume. I do not want that <SPAN class=SpellE>vtk</SPAN>
select the LOD but I want to select myself the LOD when I rotate, zoom or pan
volume. I can select the right LOD using <SPAN
class=SpellE>SetSelectedLODID</SPAN> but I do not know where I can intercept
mouse click to change LOD. Can I have your help?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: EN-GB"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><SPAN class=SpellE><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Thank</SPAN></FONT></SPAN><FONT
face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"> <SPAN
class=SpellE>you</SPAN>. <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoAutoSig><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-no-proof: yes">Dr. Massimo
Ivani<o:p></o:p></SPAN></FONT></P>
<P class=MsoAutoSig><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-no-proof: yes">Media Lab
Software<o:p></o:p></SPAN></FONT></P>
<P class=MsoAutoSig><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-no-proof: yes">Ph. (+39)
0187517775<o:p></o:p></SPAN></FONT></P>
<P class=MsoAutoSig><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-no-proof: yes">Fax (+39)
0187511833<o:p></o:p></SPAN></FONT></P>
<P class=MsoAutoSig><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-no-proof: yes"><A
href="mailto:massimo.ivani@mlsw.com"><SPAN lang=EN-GB
style="mso-ansi-language: EN-GB">massimo.ivani@mlsw.com</SPAN></A></SPAN></FONT><SPAN
lang=EN-GB
style="mso-ansi-language: EN-GB; mso-no-proof: yes"><o:p></o:p></SPAN></P>
<P class=MsoAutoSig><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-no-proof: yes"><A
href="http://www.mlsw.com"><SPAN lang=EN-GB
style="mso-ansi-language: EN-GB">www.mlsw.com</SPAN></A></SPAN></FONT><SPAN
lang=EN-GB
style="mso-ansi-language: EN-GB; mso-no-proof: yes"><o:p></o:p></SPAN></P>
<P class=MsoAutoSig><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-no-proof: yes"><A
href="http://www.implant3d.com"><SPAN lang=EN-GB
style="mso-ansi-language: EN-GB">www.implant3d.com</SPAN></A></SPAN></FONT><FONT
face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: EN-GB"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN lang=EN-GB
style="FONT-SIZE: 12pt; mso-ansi-language: EN-GB"><o:p> </o:p></SPAN></FONT></P></DIV></BLOCKQUOTE></BODY></HTML>