[vtkusers] Changing the direction of Z

[Paul Harris]

The models themselves.   Flipping the ViewUp seems to be the same as turning
the monitor upside down, but that is not the result I want.

The problem is that Z in model coordinates is "downwards", but vtk seems to
insist that Z is "upwards".

This problem is not just for Z either,
I also have the situation where in some circumstances, the Y should point
the other way.   ie, Y means South rather than North.



On 16 October 2010 03:32, Bill Lorensen <bill.lorensen at gmail.com> wrote:

> Do you want the models flipped, or just the view of the models?
>
> If it is the latter, you can set the ViewUp of the camera to 0,0,-1.
>
>
> On Fri, Oct 15, 2010 at 3:17 PM, Paul Harris <harris.pc at gmail.com> wrote:
> > Hi all,
> >
> > I have a VTK scene with some vtkPolyDataMappers and actors, plus an
> > orientation widget.
> >
> > I want to change the fundamental direction of the Z axis, so that it
> points
> > down rather than up.  I want all of the models, the orientation widget,
> etc
> > to flip, so that they point down instead of up.
> >
> > I've tried lots of things but have gotten nowhere...
> >
> > how do I make this happen?
> >
> > thanks
> > Paul
> >
> >
> >
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