vtkAxes..

[Will Schroeder]

Here's an idea- create a vtkAxes2D that is rendered in the "overlay" planes (like vtkXYPlotActor or vtkAxisActor2D). Make it a subclass of vtkActor2D so it has a position coordinate, define a Position2 ivar that defines the upper right hand corner of the small rectangle into which the axes are drawn (look at vtkScalarBarActor). It'll probably have to refer to a vtkCamera (see vtkCubeAxesActor2D) to get the view direction. You'll also want to have as an option the ability to label the axes, set font size, etc.

You might also be able to hack something together using combinations (for x-y-z) of vtkAxisActor2D. You'd have to compute the end points of each of the three axis.

If you come up with anything I'd enjoy seeing the result.

Will

At 01:01 AM 10/1/99 -0400, K.R.Subramanian wrote:
>   
>I would like to display the axes of the 3d coordinate system in the lower left of render window 
>(using vtkAxes).  However, when interacting with the objects, the axes should only rotate and not 
>translate with the objects (the Inventor viewer had this option and I am trying to recreate it in 
>VTK). 
>
>Has someone done this? If not, what would be the easiest way to accomplish this? 
>I looked at the finance example, but this fixes the axes  close to the object and in any case, 
>moves with the object.  How about applying the inverse of the camera transform to the axes 
>actor and then composing that with just the rotation? 
>
>Thanks. 
>
>     -- krs 
>-- 
>K.R.Subramanian                           Phone: (704) 547-4872
>Department of Computer Science            FAX:   (704) 547-3516
>UNC Charlotte                             Email: krs at cs.uncc.edu
>9201 Univ. City Blvd.                     WWW: <http://www.cs.uncc.edu/~krs>http://www.cs.uncc.edu/~krs
>Charlotte, NC 28223-0001   



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