HI Gianni, How to go about it will depend upon what you are trying to achieve with your application.
At the most basic level it's likely that the ShadpeDrawable has created a display list and you aren't calling dirty to force it rebuild it after the change in settings to the osg::Sphere, try calling shapedrawable->dirtyDisplayList(); after you update the Sphere. While this might fix the immediate problem, it may well be that ShapeDrawable/Sphere isn't at all the right tool for the problem you are trying to solve. ShapeDrawable is really just a very simple way of visualizing the primitive osg::Shape objects. These osg::Shape exist to support collision detection/physics that end users may want to layer on top of the OSG - this is why you can assign them to osg::Drawable, as they can form a more accurate representation of an object than the simple BoundingBox that is used for view frustum culling. The ShapeDrawable was really just intended to help debug and for very simple vis tasks, not as a general purpose visualization tool. The most efficient way to create data for visualization is using osg::Geometry where proper OpenGL fast paths can be used so you can get the best performance and full control over the whole spectrum of vertex attributes that you don't have with ShapeDrawable/Shape. If you have large number of sphere objects you may also want to start looking at point sprites or geometry instancing. Robert. Robert. On 26 November 2014 at 08:40, Gianni Ambrosio <[email protected]> wrote: > Hi All, > I need to move an osg::Sphere. I tried with setCenter() in vain. Looking > around I didn't found a solution to redraw the sphere. Isn't there a > solution different from attaching a PositionAttutudeTransform (or something > like that) as parent of the Drawable and modify then the transformation > instead of the sphere center? > > Regards, > Gianni > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=61862#61862 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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