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<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'>Dear All,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'>Many thanks to Goodwin (Lawlor) for his ideas. It is
very much along the lines of what I was thinking. However, the issue is “where”
does one do these operations? The correct place would be as part of the vtkPlaneWidget
itself (ergo my comment “short of writing a new object” –
which would be inherited form vtkPlaneWidget). What I am going to do is write
something into the call back for the widget. If this works I will then consider
writing it into the callback for the 3D axis that I have written (a triad that
rotates to indicate the view orientation – which is linked to camera
events). This would (I think) answer Goodwins’s need for the
vtkPlaneWidget handles to resize dynamically (which I would have happen at the
same time as the auto resizing of the plane itself).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'>As an aside, I am delving into the vtk3DWidget code
and in SizeHandles I noticed the following:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'>float vtk3DWidget::SizeHandles(float factor)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'>{<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'> int i;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'> vtkRenderer *renderer;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'> if ( !this->ValidPick ||
!(renderer=this->CurrentRenderer) || <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'>
!renderer->GetActiveCamera() )<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'> {<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'> return (this->HandleSize *
factor * this->InitialLength);<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'> }<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'>Notice the 2<sup>nd</sup> logical check is “renderer=this->CurrentRenderer”.
This is an assignment and is always true (I think). Is this code correct, or
should it be “renderer == this->CurrentRenderer”????<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'>Regards to all,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'>Jim<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><b><font size=3 face=Arial><span lang=EN-IE
style='font-size:12.0pt;font-family:Arial;font-weight:bold'>Jim Robinson<o:p></o:p></span></font></b></p>
<p class=MsoNormal><font size=3 face=Wingdings><span lang=EN-IE
style='font-size:12.0pt;font-family:Wingdings'>+</span></font><span lang=EN-IE> </span><font
size=2 face=Arial><span lang=EN-IE style='font-size:10.0pt;font-family:Arial'>42
Rivergrove,</span></font><span lang=EN-IE><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'> Glanmire,</span></font><span
lang=EN-IE><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'> Co. <st1:City
w:st="on"><st1:place w:st="on">Cork</st1:place></st1:City>,</span></font><span
lang=EN-IE><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-IE style='font-size:
10.0pt;font-family:Arial'> <st1:place
w:st="on">Eire</st1:place></span></font><span lang=EN-IE><o:p></o:p></span></p>
<p class=MsoNormal><font size=3 face="Wingdings 2"><span lang=EN-IE
style='font-size:12.0pt;font-family:"Wingdings 2"'>'</span></font><span
lang=EN-IE> +353 21 4822028<o:p></o:p></span></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-IE
style='font-size:12.0pt'> +353
87 2393010<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Wingdings><span lang=EN-IE
style='font-size:12.0pt;font-family:Wingdings'>-</span></font><span lang=EN-IE> <font
color=blue><span style='color:blue'><a href="mailto:jrobinson@eircom.net">jrobinson@eircom.net</a></span></font><o:p></o:p></span></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-IE
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-IE
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
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