Hi Dean,<br><br>Thanks for your help. I looked at <font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">TestImageTracerWidget.cxx and tryed the code in my own application, but still have some problems:<br>
<br>1. vtkImageTracerWidget is for drawing ON a vtk plane, isn't it? So why do I have to set image data as input to this widget? Does it draw IN the volume data instead? </span></font><br><br>2. I wanna use the widget for drawing some stuff on 2D vtkImageViewer. For showing the data in vtkImageViewer I don't need a vtkImageActor. Do I have to create one like it's described in the example, or can I get it somewhere else (maybe from the renderer attached to the imageViewer)?<br>
<br>3. Do I have to initiate the vtkITWCallback with the others objets, like it's described in the example (splineWidget, stencil, extractor etc.)?<br><br>4. Do I have to use a shifter like they did in the example?<br>
<br><br>I hope you or someone else can answer to my questions.<br>Regards, Michael<br><br><br><br><div class="gmail_quote">2009/10/18 Dean Inglis <span dir="ltr"><<a href="mailto:dean.inglis@sympatico.ca">dean.inglis@sympatico.ca</a>></span><br>
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<p class="MsoNormal"><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">HI Michael,</span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">have a look at </span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">VTK/Examples/GUI/Tcl/ImageTracerWidget.tcl</span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">and</span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">VTK/Wdigets/Testing/Cxx/TestImageTracerWidget.cxx</span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">another class the allows drawing contours/lines on
vtkImageActor</span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">is vtkContourWidget.</span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p class="MsoNormal"><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: "Courier New";">Dean</span></font></p>
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