Hi David, have a look at osg::AutoTransform
On Mon, Jan 7, 2019 at 1:41 AM David Mitchell <mooha...@gmail.com> wrote: > I have certain nodes/objects in my scene that I always want to be the same > size regardless of their distance from the camera and I'm trying to figure > out the best way to go about doing this. My first thought is to create a > custom NodeCallback to add to the node as a cull callback and then get the > distance from the node to the camera and apply the appropriate scale to the > node (as a MatrixTransform). Is that a reasonable approach? > > The other thing I'm struggling with is how to calculate the proper scale. > What I'd like is for the object's geometry to translate to pixel units, > meaning if the vertices range from (-10, -10, -10) to (10, 10, 10), then it > would take up roughly 20x20 pixels on the screen when scaled. Rather than > fumbling around with different matrices and transforms trying to get this > to work, I thought I'd try asking first. > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=75383#75383 > > > > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- trajce nikolov nick
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