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

[Amy Henderson]

Hi Andrea,

Try using vtkOrientationMarkerWidget. Take a look at 
VTK/Hybrid/Testing/Cxx/TestOrientationMarkerWidget.cxx

- Amy

At 04:05 PM 7/13/2004, Andrea Gavana wrote:
>Hello NG,
>
>       I have a problem regarding the display of 3D axes along with a VTK
>visualization to provide a user with orientation information. What I would 
>like
>to have, is a small "window" in the bottom left corner of a VTK visualization
>figure in which there are the 3 axis (X-Y-Z) that give the orientation
>information to the user. Ideally, these axes should rotate as the user rotate
>the camera in the main window, but they should not be pickable/rotatable. The
>should be "untouchable"...
>       By googling around, I found some solution, but unfortunately only 
> with a
>small snippet of C/C++ code (I am not exactly a guru in C/C++, the
>contrary...), and for me it is not so clear.
>
>This is what I found:
>
>1) Use vtkCubeAxesActor2d with 2 different ViewPorts in the rendering window;
>this is a good solution, but I would like to have the axes displayed as
>tubes+cones (for the axis heads), or as arrows, with the 3 nice colors 
>provided
>by VTK for the vtkAxes.
>2) Use 2 ViewPOrts in the main window, with 2 renderers (one for each
>viewport). Draw the axis using a combination of
>vtkAxes+vtkTubeFilter+vtkConeSource in the second viewport and apply the 
>camera
>of the first viewport to the second viewport. Unfortunately, in the first
>(main) viewport I have to use SetScale on all the Actors I have (surface,
>wireframe, polydata...), and when I set the camera (from the first 
>viewport) to
>the second viewport, the axis in the second viewport disappear. I don't know
>how to set the position/scale of the axis in the second viewport (or the 
>camera
>position) in order to apply to it the camera from the first viewport.
>
>Does anyone have a solution? A snippet of code (Python/tcl/java)? At the 
>moment
>I'm using Python, but everything is fine. If someone else has a different
>solution from the ones I proposed, everything is welcome.
>
>Thank you for every suggestion.
>
>Andrea.
>
>
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