Hi Inna, On 26 September 2016 at 22:42, Inna Reddy <[email protected]> wrote: > Thanks for the reply. Sorry , Seems I explained very badly . Well , my issue > is that I want to make sphere and text on it. I was able to do with the > EllipsoidModel and using log , lat and height. I want to do the same with > same Sphere. But I dont have idea how to do with sphere the same thing. I > want to make sphere with radius which varys basing on the screen coordinates. > In osg::Sphere I can see setradius(), but how can i set radius to screen > coordinates ?
The osg::Sphere class is just a shape primitive it just provides a position and a radius, the coordinate frame all depends on how you want to use that data. Computing positions on a sphere is easy, just a matter of sin and cos. Do you need help with this? There are plenty of guides on line on how to do trigonometry of spheres. Finally on the screen coordinate side, you'll need to give us some context. Are you trying to visualize the sphere? In screen coordinates? Or are you just trying to map mouse coordinates to an intersection point on geometry in the scene that you then attach a bit of text to? Robert. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
