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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;"><br>
Jorge,<br>
I managed, with help from a few other sources, to get that idea written into python. It's exactly what i need, thanks again!<br>
<br>
Greg,<br>
Here is a piece of python code in which you can move an object within the renderer and get/write its position ( this helps me because i can move to the point whose coordinates i am wondering about, thereby figuring its location ). I don't know if this helps
you, but you were asking about it...<br>
<br>
import vtk<br>
<br>
def main():<br>
<br>
# -- Jorge Perez's advice, following right after std setup block below, <br>
# combined with insights about the main tool, vtkFixedSizeHandleRepresentation3D, from<br>
# http://vtk.org/gitweb?p=VTK.git;a=blob;f=Interaction/Widgets/Testing/Cxx/TestFixedSizeHandleRepresentation3D.Cxx
<br>
<br>
# -- std setup part -- <br>
ren=vtk.vtkRenderer()<br>
# -- add here whatever objects you like to this renderer,<br>
# or proceed with an empty scenery and place only the<br>
# movable handle.<br>
<br>
windowSize=(800,800)<br>
title="whatever title here"<br>
<br>
renWind=vtk.vtkRenderWindow()<br>
renWind.SetWindowName( title )<br>
renWind.AddRenderer( ren )<br>
renWind.SetSize( windowSize[0], windowSize[1] )<br>
<br>
iren=vtk.vtkRenderWindowInteractor()<br>
iren.SetRenderWindow( renWind )<br>
<br>
style=vtk.vtkInteractorStyleTrackballCamera()<br>
iren.SetInteractorStyle( style )<br>
# -- end std things, before display --<br>
<br>
# -----------------------------------------------<br>
# -- main part, after all other components ( not<br>
# included ) have been added to the renderer,<br>
# we place the movable handle and define a <br>
# call-back function object to report location<br>
# -----------------------------------------------<br>
rep=vtk.vtkFixedSizeHandleRepresentation3D()<br>
rep.SetHandleSizeInPixels( 10 )<br>
rep.GetProperty().SetColor( (0.4,0,0) ) <br>
rep.SetWorldPosition( (0,0,0) )<br>
<br>
widget=vtk.vtkHandleWidget()<br>
widget.SetInteractor( renWind.GetInteractor() )<br>
widget.SetDefaultRenderer( ren )<br>
widget.SetRepresentation( rep )<br>
<br>
# -- here we need the callback function object, like 'mcbk' at line<br>
# 628-631 in the C++ example ( see Execute() defined at lines<br>
# 566-577, which needs to know about rep. ) <br>
# A simple python class to serve this purpose is used below<br>
hcb=HandleCallback( rep )<br>
widget.AddObserver( 'InteractionEvent', hcb)<br>
widget.On()<br>
<br>
# -- start the show --<br>
iren.Initialize()<br>
iren.Start() <br>
<br>
return <br>
<br>
<br>
class HandleCallback():<br>
def __init__(self, rep):<br>
self.rep=rep<br>
print "HandleCallback obj built"<br>
def __call__(self, obj, ev):<br>
loc=self.rep.GetWorldPosition()<br>
print "left at: ( %7.2f , %7.2f, %7.2f )" % ( loc )<br>
return<br>
<br>
<br>
main() <br>
<br>
<br>
<br>
<div style="font-family: Times New Roman; color: #000000; font-size: 16px">
<hr tabindex="-1">
<div style="direction: ltr;" id="divRpF256229"><font color="#000000" face="Tahoma" size="2"><b>From:</b> vtkusers-bounces@vtk.org [vtkusers-bounces@vtk.org] on behalf of Podariu, Silviu [spodariu@unmc.edu]<br>
<b>Sent:</b> Thursday, December 19, 2013 8:07 PM<br>
<b>To:</b> Jorge Perez<br>
<b>Cc:</b> vtkusers@vtk.org<br>
<b>Subject:</b> Re: [vtkusers] location of movable component<br>
</font><br>
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<div style="direction:ltr; font-family:Tahoma; color:#000000; font-size:10pt"><br>
<font size="2">Thank you Jorge,<br>
<br>
I have been trying to convert the Tcl to Python; still working on it... :)<br>
<br>
Silviu<br>
</font><br>
<div style="font-family:Times New Roman; color:#000000; font-size:16px">
<hr tabindex="-1">
<div id="divRpF661" style="direction:ltr"><font color="#000000" face="Tahoma" size="2"><b>From:</b> Jorge Perez [josp.jorge@gmail.com]<br>
<b>Sent:</b> Monday, December 16, 2013 3:46 AM<br>
<b>To:</b> Podariu, Silviu<br>
<b>Cc:</b> vtkusers@vtk.org<br>
<b>Subject:</b> Re: [vtkusers] location of movable component<br>
</font><br>
</div>
<div></div>
<div>
<div dir="ltr">
<div>Hi, you can use vtkHandleWidget<br>
<br>
<a href="http://www.vtk.org/doc/nightly/html/classvtkHandleWidget.html#details" target="_blank">http://www.vtk.org/doc/nightly/html/classvtkHandleWidget.html#details</a><br>
<br>
</div>
below is a simple example in Tcl, the position is printed in standard output.<br>
<br>
package require vtk<br>
package require vtkinteraction<br>
<br>
# this proc will be invoked during widget interaction<br>
proc OnInteraction { r } {<br>
set pos [$r GetWorldPosition]<br>
puts "pos = $pos"<br>
}<br>
<br>
vtkTkRenderWidget .tkrw<br>
::vtk::bind_tk_render_widget .tkrw<br>
<br>
set renWin [.tkrw GetRenderWindow]<br>
<br>
vtkRenderer ren<br>
ren SetBackground 0.0 0.4 0.5<br>
<br>
$renWin AddRenderer ren<br>
<br>
# create the widget representation<br>
vtkFixedSizeHandleRepresentation3D rep<br>
rep SetHandleSizeInPixels 10<br>
[rep GetProperty] SetColor 1 0 0<br>
rep SetWorldPosition 0 0 0<br>
<br>
# create the widget<br>
vtkHandleWidget widget<br>
widget SetInteractor [$renWin GetInteractor]<br>
widget SetDefaultRenderer ren<br>
widget SetRepresentation rep<br>
# add the interaction observer<br>
widget AddObserver InteractionEvent {OnInteraction rep}<br>
after idle {widget On}<br>
<br>
pack .tkrw -fill both -expand yes<br>
<br>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">2013/12/13 Podariu, Silviu <span dir="ltr"><<a href="mailto:spodariu@unmc.edu" target="_blank">spodariu@unmc.edu</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex; border-left:1px #ccc solid; padding-left:1ex">
<div>
<div style="direction:ltr; font-size:10pt; font-family:Tahoma"><br>
Hello,<br>
<br>
Is there a way of adding a little component in space ( point, sphere, cube ), which can be moved interactively ( with the mouse/arrows/keys ) and whose location at any time can be displayed in the terminal ( or on the renderer window itself )?<br>
<br>
Thanks,<br>
Silviu<br>
<br>
<br>
</div>
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