Merge pull request #11519 from Rexbas/rotation-center-zoom

Gui: Update rotation center indicator after zoom

src/Gui/NavigationStyle.cpp

@@ -739,6 +739,13 @@ void NavigationStyle::doZoom(SoCamera* camera, float logfactor, const SbVec2f& p
         SbViewVolume vv = camera->getViewVolume(vp.getViewportAspectRatio());
         SbPlane panplane = vv.getPlane(camera->focalDistance.getValue());
         panCamera(viewer->getSoRenderManager()->getCamera(), ratio, panplane, pos, SbVec2f(0.5,0.5));
+
+        // Change the position of the rotation center indicator after zooming at cursor
+        // Rotation mode is WindowCenter
+        if (!rotationCenterMode) {
+            viewer->changeRotationCenterPosition(getFocalPoint());
+            findBoundingSphere();
+        }
     }
 }
 

src/Gui/View3DInventorViewer.cpp

@@ -1407,6 +1407,7 @@ void View3DInventorViewer::showRotationCenter(bool show)
             material->transparency = 1.0F - float(color.alphaF());
 
             auto translation = new SoTranslation();
+            translation->setName("translation");
             translation->translation.setValue(center);
 
             auto annotation = new SoAnnotation();
@@ -1433,6 +1434,20 @@ void View3DInventorViewer::showRotationCenter(bool show)
     }
 }
 
+// Changes the position of the rotation center indicator
+void View3DInventorViewer::changeRotationCenterPosition(const SbVec3f& newCenter) {
+    if (!rotationCenterGroup) {
+        return;
+    }
+
+    SoTranslation* translation = dynamic_cast<SoTranslation*>(rotationCenterGroup->getByName("translation"));
+    if (!translation) {
+        return;
+    }
+
+    translation->translation = newCenter;
+}
+
 void View3DInventorViewer::setNavigationType(Base::Type type)
 {
     if (this->navigation && this->navigation->getTypeId() == type) {

src/Gui/View3DInventorViewer.h

@@ -416,6 +416,7 @@ public:
     bool hasAxisCross();
 
     void showRotationCenter(bool show);
+    void changeRotationCenterPosition(const SbVec3f& newCenter);
 
     void setEnabledFPSCounter(bool on);
     void setEnabledNaviCube(bool on);