Add a sensitivity value to improve issue #0000772

src/Gui/NavigationStyle.cpp

@@ -54,10 +54,12 @@ struct NavigationStyleP {
     SbVec3f focal1, focal2;
     SbRotation endRotation;
     SoTimerSensor * animsensor;
+    float sensitivity;
 
     NavigationStyleP()
     {
         this->animationsteps = 0;
+        this->sensitivity = 2.0f;
     }
     static void viewAnimationCB(void * data, SoSensor * sensor);
 };
@@ -780,6 +782,14 @@ void NavigationStyle::spin(const SbVec2f & pointerpos)
     this->spinprojector->project(lastpos);
     SbRotation r;
     this->spinprojector->projectAndGetRotation(pointerpos, r);
+    float sensitivity = getSensitivity();
+    if (sensitivity > 1.0f) {
+        SbVec3f axis;
+        float radians;
+        r.getValue(axis, radians);
+        radians = sensitivity * radians;
+        r.setValue(axis, radians);
+    }
     r.invert();
     this->reorientCamera(viewer->getCamera(), r);
 
@@ -923,6 +933,16 @@ void NavigationStyle::stopAnimating(void)
         NavigationStyle::IDLE : NavigationStyle::INTERACT);
 }
 
+void NavigationStyle::setSensitivity(float val)
+{
+    PRIVATE(this)->sensitivity = val;
+}
+
+float NavigationStyle::getSensitivity() const
+{
+    return PRIVATE(this)->sensitivity;
+}
+
 void NavigationStyle::setZoomInverted(SbBool on)
 {
     this->invertZoom = on;

src/Gui/NavigationStyle.h

@@ -110,6 +110,9 @@ public:
     void stopAnimating(void);
     SbBool isAnimating(void) const;
 
+    void setSensitivity(float);
+    float getSensitivity() const;
+
     void setZoomInverted(SbBool);
     SbBool isZoomInverted() const;
     void setZoomStep(float);

src/Gui/View3DInventor.cpp

@@ -140,6 +140,7 @@ View3DInventor::View3DInventor(Gui::Document* pcDocument, QWidget* parent, Qt::W
     OnChange(*hGrp,"BacklightIntensity");
     OnChange(*hGrp,"NavigationStyle");
     OnChange(*hGrp,"OrbitStyle");
+    OnChange(*hGrp,"Sensitivity");
 
     stopSpinTimer = new QTimer(this);
     connect(stopSpinTimer, SIGNAL(timeout()), this, SLOT(stopAnimating()));
@@ -274,6 +275,10 @@ void View3DInventor::OnChange(ParameterGrp::SubjectType &rCaller,ParameterGrp::M
         int style = rGrp.GetInt("OrbitStyle",1);
         _viewer->navigationStyle()->setOrbitStyle(NavigationStyle::OrbitStyle(style));
     }
+    else if (strcmp(Reason,"Sensitivity") == 0) {
+        float val = rGrp.GetFloat("Sensitivity",2.0f);
+        _viewer->navigationStyle()->setSensitivity(val);
+    }
     else if (strcmp(Reason,"InvertZoom") == 0) {
         bool on = rGrp.GetBool("InvertZoom", false);
         _viewer->navigationStyle()->setZoomInverted(on);