[osg-users] 2D manipulator only

[Robert Osfield]

Hi Bruno,

On 11 April 2016 at 16:21, Bruno Oliveira <bruno.manata.oliveira at gmail.com>
wrote:

> How do I allow my mouse manipulator (actually an
> osg::TrackballManipulator) to allow moving in 2D plane only?
>
> This is for vieweing an image and I want something similar to google maps
> or so
>

The TrackballManipulator is a 3D manipulator and has no support for
constraining to a 3D plane.

If you want 2D movement then you will need to write your own
"MapManipulator" or just set the the Viewer's master Camera's ViewMatrix
directly with the frame loop.

Robert.
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