[vtkusers] 3D Axes For User Orientation...

[Andrew J. P. Maclean]

Andrea, if you are using TCL, it is quite easily done as follows. If you are
using Python, this may give you some ideas.

Amy, maybe we should also have a TCL example in the VTK source tree. If you
want, I can knock one up using the code below. 

This really is a brilliant little widget!

Regards
    Andrew

#------------- Orientation Marker 
# Do this after you have initialised the interactor.
# Orientation Marker 
vtkAxesActor axes
  axes SetShaftTypeToCylinder
  axes SetXAxisLabelText "x"
  axes SetYAxisLabelText "y"
  axes SetZAxisLabelText "z"

  axes SetTotalLength 1.5 1.5 1.5
  axes SetCylinderRadius [expr 0.500 * [axes GetCylinderRadius]]
  axes SetConeRadius     [expr 1.025 * [axes GetConeRadius]]
  axes SetSphereRadius   [expr 1.500 * [axes GetSphereRadius]]

# vtkCaptionActor2D - just a reminder as to the type, we are using a pointer
here.
set cax [axes GetXAxisCaptionActor2D]
# vtkTextProperty - just a reminder as to the type, we are using a pointer
here.
set tprop [$cax GetCaptionTextProperty]
  $tprop ItalicOn
  $tprop ShadowOn
  $tprop SetFontFamilyToTimes

set cay [axes GetYAxisCaptionActor2D]
set caz [axes GetZAxisCaptionActor2D]
  $cay SetCaptionTextProperty $tprop
  $caz SetCaptionTextProperty $tprop

# Combine orientation markers into one with an assembly
#
vtkPropAssembly assembly
  assembly AddPart axes
# Add more markers to the assembly if you want.

# Finally ... set up the widget
#
vtkOrientationMarkerWidget widget
  widget SetOutlineColor 0.9300 0.5700 0.1300
  widget SetOrientationMarker assembly
  widget SetInteractor iren
  widget SetViewport 0.0 0.0 0.4 0.4 
  widget SetEnabled 1
  widget InteractiveOff
  widget InteractiveOn
#--------------------------------


___________________________________________

Andrew J. P. Maclean

Centre for Autonomous Systems
The Rose Street Building J04
The University of Sydney  2006  NSW
AUSTRALIA

Ph: +61 2 9351 3283
Fax: +61 2 9351 7474

URL: http://www.cas.edu.au/
___________________________________________


-----Original Message-----
From: Andrea Gavana [mailto:andrea.gavana at polymtl.ca] 
Sent: Wednesday, 14 July 2004 06:47
To: vtkusers at vtk.org
Subject: Re: [vtkusers] 3D Axes For User Orientation...

Selon Amy Henderson <amy.henderson at kitware.com>:

> Hi Andrea,
> 
> Try using vtkOrientationMarkerWidget. Take a look at 
> VTK/Hybrid/Testing/Cxx/TestOrientationMarkerWidget.cxx
> 
> - Amy
> 

Hi Amy,

   thank you a lot for your suggestion... I think that probably it is too 
complicated for me (I know I know, I should learn C/C++, but Python is so
nice 
and simple...). I don't have Python here at home, and I don't know if this 
class is present in the vtkpython wrappers (Python 2.3, VTK 4.2.4). I will
try 
it tomorrow, but I don't have a big expectation on my ability to understand
the 
example in VTK/Hybrid/Testing/Cxx/TestOrientationMarkerWidget.cxx (and also
to 
understand what the documentation for vtkOrientationMarkerWidget says about 
it... it is quite complex for a non-english person ;-) ).
   Anyway, thank you for your interest on this question. If someone else has

other suggestion, please let me know.

Andrea.