Hi, I am trying to add a 2D box to my scene (consisting of lines 1 pixel wide) that a user can resize by dragging the sides or corners, or rotate by dragging a handle. I'm attempting to use the osgManipulator Dragger classes for this purpose. I created a subclass of CompositeDragger and added to it a Scale2DDragger (for the corners) and two Scale1DDraggers (for each pair of sides). Basically the code is a copy of the TabPlaneDragger without the TranslatePlaneDragger child dragger.
I added the dragger to my scene using the osgManipulator example as a guide. My scene looks like this: Group | \ MatrixTransform CustomDragger | Geode (containing box geometry) and I call addTransformUpdating() on CustomDragger passing the MatrixTransform. The box resizes correctly when I drag the handles. A problem I am having is that the drag handles will not stay a constant size. If I drag the box so that one side is longer than the other, the handle boxes will have the same non-uniform scaling. I am using AutoTransform and AntiSquish in my code exactly the way TabPlaneDragger does to prevent this from happening, but for some reason it doesn't work in my code (although it works in the osgManipulator example). The only real difference in my code is that I set a rotation matrix in the CustomDragger, in order to draw the drag boxes in the XY plane (it seems to default to the XZ plane). What could be causing the drag handles to scale instead of staying a constant screen size? What I ultimately want is for the entire box to be draggable. So I want the handles to cover the box, and be a constant few pixels wide in screen coordinates regardless of the zoom level. Then I will make the handles invisible so only the 1-pixel wide box is visible. Any advice on how to do this? (I am using OSG 3.0.0.) ... Thank you! Cheers, Michael ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50761#50761 _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
