Gui: add convenience function View3DInventorViewer::getBoundingBox()

src/Gui/View3DInventorViewer.cpp

@@ -2967,6 +2967,14 @@ void View3DInventorViewer::boxZoom(const SbBox2s& box)
     navigation->boxZoom(box);
 }
 
+SbBox3f View3DInventorViewer::getBoundingBox() const
+{
+    SbViewportRegion vp = this->getSoRenderManager()->getViewportRegion();
+    SoGetBoundingBoxAction action(vp);
+    action.apply(this->getSoRenderManager()->getSceneGraph());
+    return action.getBoundingBox();
+}
+
 void View3DInventorViewer::viewAll()
 {
     SbViewportRegion vp = this->getSoRenderManager()->getViewportRegion();

src/Gui/View3DInventorViewer.h

@@ -357,6 +357,11 @@ public:
     /// Breaks out a VR window for a Rift
     void viewVR(void);
 
+    /**
+     * Returns the bounding box of the scene graph.
+     */
+    SbBox3f getBoundingBox() const;
+
     /**
      * Reposition the current camera so we can see all selected objects
      * of the scene. Therefore we search for all SOFCSelection nodes, if