line widget set/get line width

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

@@ -38,6 +38,9 @@ namespace temp_viz
     {
     public:
         LineWidget(const Point3f &pt1, const Point3f &pt2, const Color &color = Color::white());
+        
+        void setLineWidth(float line_width);
+        float getLineWidth();
     };
 
 

modules/viz/src/simple_widgets.cpp

@@ -16,3 +16,15 @@ temp_viz::LineWidget::LineWidget(const Point3f &pt1, const Point3f &pt2, const C
 
     setColor(color);
 }
+
+void temp_viz::LineWidget::setLineWidth(float line_width)
+{
+    vtkSmartPointer<vtkLODActor> actor = WidgetAccessor::getActor(*this);
+    actor->GetProperty()->SetLineWidth(line_width);
+}
+
+float temp_viz::LineWidget::getLineWidth()
+{
+    vtkSmartPointer<vtkLODActor> actor = WidgetAccessor::getActor(*this);
+    return actor->GetProperty()->GetLineWidth();
+}

modules/viz/test/test_viz3d.cpp

@@ -115,6 +115,7 @@ TEST(Viz_viz3d, accuracy)
         v.setShapePose("sphere1", cloudPosition);
         v.setShapePose("arrow1", cloudPosition);
         lw2.setColor(temp_viz::Color(col_blue, col_green, col_red));
+        lw.setLineWidth(lw.getLineWidth()+pos_x * 10);
         
         angle_x += 0.1f;
         angle_y -= 0.1f;