[vtkusers] vtkDistanceWidget unit conversion

[Alex Malyushytsky]

I did it by subclassing vtkDistanceRepresentation2D and then setting
presentation to vtkDistanceWidget.

I can't provide complete code since it was written for commercial product,
but
can tell how:

-  add member to store scale factor there (set it to 1 by default);

- override vtkDistanceRepresentation2D::BuildRepresentation()

- do in there everything exactly the way original code did ( look at source
code )

- before call to this->AxisActor->SetTitle(string) provide to sprint scaled
distance value instead of original

 sprintf(string, this->LabelFormat, scaledDistance );


Regards,

   Alex



On Mon, Mar 16, 2015 at 7:58 PM, Barry Hathaway <bhathaw1 at nycap.rr.com>
wrote:

> I'm using vtkDistanceWidget and was wondering if it is possible to scale
> the distance measurement that is displayed
> in the label by a factor of 1000 - basically I want to measurement
> displayed in mm rather than meters.
> Also, is it possible to augment the label with the distance in only the Z
> direction?
> Thanks in advance.
>
> Barry Hathaway
>
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