text3dwidget offers now users to decide whether it should face the camera or not

modules/viz/include/opencv2/viz/viz3d.hpp

@@ -62,7 +62,7 @@ namespace cv
             void setRenderingProperty(const String &id, int property, double value);
             double getRenderingProperty(const String &id, int property);
             
-            void setDesiredUpdateRate(double time);
+            void setDesiredUpdateRate(double rate);
             double getDesiredUpdateRate();
             
             void setRepresentation(int representation);

modules/viz/include/opencv2/viz/widgets.hpp

@@ -14,7 +14,6 @@ namespace cv
             OPACITY,
             LINE_WIDTH,
             FONT_SIZE,
-            COLOR,
             REPRESENTATION,
             IMMEDIATE_RENDERING,
             SHADING
@@ -162,7 +161,7 @@ namespace cv
         class CV_EXPORTS Text3DWidget : public Widget3D
         {
         public:
-            Text3DWidget(const String &text, const Point3f &position, double text_scale = 1.0, const Color &color = Color::white());
+            Text3DWidget(const String &text, const Point3f &position, double text_scale = 1.0, bool face_camera = true, const Color &color = Color::white());
 
             void setText(const String &text);
             String getText() const;

modules/viz/src/shape_widgets.cpp

@@ -521,7 +521,7 @@ template<> cv::viz::GridWidget cv::viz::Widget::cast<cv::viz::GridWidget>()
 ///////////////////////////////////////////////////////////////////////////////////////////////
 /// text3D widget implementation
 
-cv::viz::Text3DWidget::Text3DWidget(const String &text, const Point3f &position, double text_scale, const Color &color)
+cv::viz::Text3DWidget::Text3DWidget(const String &text, const Point3f &position, double text_scale, bool face_camera, const Color &color)
 {
     vtkSmartPointer<vtkVectorText> textSource = vtkSmartPointer<vtkVectorText>::New();
     textSource->SetText(text.c_str());
@@ -530,12 +530,23 @@ cv::viz::Text3DWidget::Text3DWidget(const String &text, const Point3f &position,
     vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
     mapper->SetInputConnection (textSource->GetOutputPort());
     
+    if (face_camera)
+    {
         vtkSmartPointer<vtkFollower> actor = vtkSmartPointer<vtkFollower>::New();
         actor->SetMapper(mapper);
         actor->SetPosition(position.x, position.y, position.z);
         actor->SetScale(text_scale);
-    
         WidgetAccessor::setProp(*this, actor);
+    }
+    else
+    {
+        vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
+        actor->SetMapper(mapper);
+        actor->SetPosition(position.x, position.y, position.z);
+        actor->SetScale(text_scale);
+        WidgetAccessor::setProp(*this, actor);
+    }
+    
     setColor(color);
 }
 

modules/viz/src/viz3d.cpp

@@ -84,7 +84,7 @@ void cv::viz::Viz3d::setBackgroundColor(const Color& color) { impl_->setBackgrou
 void cv::viz::Viz3d::setRenderingProperty(const String &id, int property, double value) { getWidget(id).setRenderingProperty(property, value); }
 double cv::viz::Viz3d::getRenderingProperty(const String &id, int property) { return getWidget(id).getRenderingProperty(property); }
 
-void cv::viz::Viz3d::setDesiredUpdateRate(double time) { impl_->setDesiredUpdateRate(time); }
+void cv::viz::Viz3d::setDesiredUpdateRate(double rate) { impl_->setDesiredUpdateRate(rate); }
 double cv::viz::Viz3d::getDesiredUpdateRate() { return impl_->getDesiredUpdateRate(); }
 
 void cv::viz::Viz3d::setRepresentation(int representation) { impl_->setRepresentation(representation); }

modules/viz/src/viz3d_impl.cpp

@@ -189,10 +189,10 @@ cv::Affine3f cv::viz::Viz3d::VizImpl::getWidgetPose(const String &id) const
 }
 
 /////////////////////////////////////////////////////////////////////////////////////////////
-void cv::viz::Viz3d::VizImpl::setDesiredUpdateRate(double time)
+void cv::viz::Viz3d::VizImpl::setDesiredUpdateRate(double rate)
 {
     if (interactor_)
-        interactor_->SetDesiredUpdateRate(time);
+        interactor_->SetDesiredUpdateRate(rate);
 }
 
 /////////////////////////////////////////////////////////////////////////////////////////////

modules/viz/src/viz3d_impl.hpp

@@ -24,7 +24,7 @@ public:
     void updateWidgetPose(const String &id, const Affine3f &pose);
     Affine3f getWidgetPose(const String &id) const; 
 
-    void setDesiredUpdateRate(double time);
+    void setDesiredUpdateRate(double rate);
     double getDesiredUpdateRate();
 
     /** \brief Returns true when the user tried to close the window */