refactored WImage3D

modules/viz/doc/widget.rst

@@ -170,13 +170,16 @@ Base class of all 3D widgets. ::
     public:
         Widget3D() {}
 
+        //! widget position manipulation, i.e. place where it is rendered.
         void setPose(const Affine3d &pose);
         void updatePose(const Affine3d &pose);
         Affine3d getPose() const;
 
+        //! updates internal widget data, i.e. points, normals, etc.
+        void applyTransform(const Affine3d &transform);
+
         void setColor(const Color &color);
-    private:
-        /* hidden */
+
     };
 
 viz::Widget3D::setPose
@@ -201,6 +204,15 @@ Returns the current pose of the widget.
 
 .. ocv:function:: Affine3d getWidgetPose() const
 
+
+viz::Widget3D::applyTransform
+-------------------------------
+Transforms internal widget data (i.e. points, normals) using the given transform. 
+
+.. ocv:function::  void applyTransform(const Affine3d &transform);
+
+    :param transform: Specified transformation to apply.
+
 viz::Widget3D::setColor
 -----------------------
 Sets the color of the widget.
@@ -598,25 +610,25 @@ This 3D Widget represents an image in 3D space. ::
 
     class CV_EXPORTS WImage3D : public Widget3D
     {
-    public:
-        //! Creates 3D image at the origin
-        WImage3D(const Mat &image, const Size &size);
-        //! Creates 3D image at a given position, pointing in the direction of the normal, and having the up_vector orientation
-        WImage3D(const Vec3d &position, const Vec3d &normal, const Vec3d &up_vector, const Mat &image, const Size &size);
+	public:
+		//! Creates 3D image at the origin
+		WImage3D(const Mat &image, const Size2d &size);
+		//! Creates 3D image at a given position, pointing in the direction of the normal, and having the up_vector orientation
+		WImage3D(const Mat &image, const Size2d &size, const Vec3d &position, const Vec3d &normal, const Vec3d &up_vector);
 
-        void setImage(const Mat &image);
-    };
+		void setImage(const Mat &image);
+	};
 
 viz::WImage3D::WImage3D
 -----------------------
 Constructs an WImage3D.
 
-.. ocv:function:: WImage3D(const Mat &image, const Size &size)
+.. ocv:function:: WImage3D(const Mat &image, const Size2d &size)
 
     :param image: BGR or Gray-Scale image.
     :param size: Size of the image.
 
-.. ocv:function:: WImage3D(const Vec3d &position, const Vec3d &normal, const Vec3d &up_vector, const Mat &image, const Size &size)
+.. ocv:function:: WImage3D(const Mat &image, const Size2d &size, const Vec3d &position, const Vec3d &normal, const Vec3d &up_vector)
 
     :param position: Position of the image.
     :param normal: Normal of the plane that represents the image.

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

@@ -111,10 +111,14 @@ namespace cv
         public:
             Widget3D() {}
 
+            //! widget position manipulation, i.e. place where it is rendered
             void setPose(const Affine3d &pose);
             void updatePose(const Affine3d &pose);
             Affine3d getPose() const;
 
+            //! update internal widget data, i.e. points, normals, etc.
+            void applyTransform(const Affine3d &transform);
+
             void setColor(const Color &color);
 
         };
@@ -172,7 +176,8 @@ namespace cv
         class CV_EXPORTS WCube : public Widget3D
         {
         public:
-            WCube(const Point3d& pt_min, const Point3d& pt_max, bool wire_frame = true, const Color &color = Color::white());
+            WCube(const Point3d& min_point = Vec3d::all(-0.5), const Point3d& max_point = Vec3d::all(0.5),
+                  bool wire_frame = true, const Color &color = Color::white());
         };
 
         class CV_EXPORTS WPolyLine : public Widget3D
@@ -213,10 +218,12 @@ namespace cv
         class CV_EXPORTS WImage3D : public Widget3D
         {
         public:
-            //! Creates 3D image at the origin
-            WImage3D(const Mat &image, const Size &size);
+            //! Creates 3D image in a plane centered at the origin with normal orientaion along z-axis,
+            //! image x- and y-axes are oriented along x- and y-axes of 3d world
+            WImage3D(const Mat &image, const Size2d &size);
+
             //! Creates 3D image at a given position, pointing in the direction of the normal, and having the up_vector orientation
-            WImage3D(const Vec3d &position, const Vec3d &normal, const Vec3d &up_vector, const Mat &image, const Size &size);
+            WImage3D(const Mat &image, const Size2d &size, const Vec3d &center, const Vec3d &normal, const Vec3d &up_vector);
 
             void setImage(const Mat &image);
         };

modules/viz/src/precomp.hpp

@@ -126,6 +126,7 @@
 #include <vtkVRMLExporter.h>
 #include <vtkTensorGlyph.h>
 #include <vtkImageAlgorithm.h>
+#include <vtkTransformFilter.h>
 
 #if !defined(_WIN32) || defined(__CYGWIN__)
 # include <unistd.h> /* unlink */
@@ -175,6 +176,8 @@ namespace cv
             friend class Viz3d;
         };
 
+        template<typename _Tp> inline _Tp normalized(const _Tp& v) { return v * 1/norm(v); }
+
         template<typename _Tp> inline bool isNan(const _Tp* data)
         {
             return isNan(data[0]) || isNan(data[1]) || isNan(data[2]);
@@ -187,10 +190,24 @@ namespace cv
             return vtkPolyData::SafeDownCast(mapper->GetInput());
         }
 
+        inline vtkSmartPointer<vtkMatrix4x4> vtkmatrix(const cv::Matx44d &matrix)
+        {
+            vtkSmartPointer<vtkMatrix4x4> vtk_matrix = vtkSmartPointer<vtkMatrix4x4>::New();
+            vtk_matrix->DeepCopy(matrix.val);
+            return vtk_matrix;
+        }
+
+        inline Color vtkcolor(const Color& color)
+        {
+            Color scaled_color = color * (1.0/255.0);
+            std::swap(scaled_color[0], scaled_color[2]);
+            return scaled_color;
+        }
+
         struct VtkUtils
         {
             template<class Filter>
-            static void SetInputData(vtkSmartPointer<Filter> filter, vtkPolyData *polydata)
+            static void SetInputData(vtkSmartPointer<Filter> filter, vtkPolyData* polydata)
             {
             #if VTK_MAJOR_VERSION <= 5
                 filter->SetInput(polydata);
@@ -238,23 +255,19 @@ namespace cv
                 normals_generator->Update();
                 return normals_generator->GetOutput();
             }
-        };
 
-        inline vtkSmartPointer<vtkMatrix4x4> vtkmatrix(const cv::Matx44d &matrix)
-        {
-            vtkSmartPointer<vtkMatrix4x4> vtk_matrix = vtkSmartPointer<vtkMatrix4x4>::New();
-            vtk_matrix->DeepCopy(matrix.val);
-            return vtk_matrix;
-        }
-
-        inline Color vtkcolor(const Color& color)
-        {
-            Color scaled_color = color * (1.0/255.0);
-            std::swap(scaled_color[0], scaled_color[2]);
-            return scaled_color;
-        }
+            static vtkSmartPointer<vtkPolyData> TransformPolydata(vtkSmartPointer<vtkPolyData> polydata, const Affine3d& pose)
+            {
+                vtkSmartPointer<vtkTransform> transform = vtkSmartPointer<vtkTransform>::New();
+                transform->SetMatrix(vtkmatrix(pose.matrix));
 
-        template<typename _Tp> inline _Tp normalized(const _Tp& v) { return v * 1/norm(v); }
+                vtkSmartPointer<vtkTransformPolyDataFilter> transform_filter = vtkSmartPointer<vtkTransformPolyDataFilter>::New();
+                transform_filter->SetTransform(transform);
+                transform_filter->SetInputConnection(polydata->GetProducerPort());
+                transform_filter->Update();
+                return transform_filter->GetOutput();
+            }
+        };
     }
 }
 

modules/viz/src/shapes.cpp

@@ -294,18 +294,18 @@ template<> cv::viz::WCylinder cv::viz::Widget::cast<cv::viz::WCylinder>()
 ///////////////////////////////////////////////////////////////////////////////////////////////
 /// cylinder widget implementation
 
-cv::viz::WCube::WCube(const Point3d& pt_min, const Point3d& pt_max, bool wire_frame, const Color &color)
+cv::viz::WCube::WCube(const Point3d& min_point, const Point3d& max_point, bool wire_frame, const Color &color)
 {
     vtkSmartPointer<vtkPolyDataAlgorithm> cube;
     if (wire_frame)
     {
         cube = vtkSmartPointer<vtkOutlineSource>::New();
-        vtkOutlineSource::SafeDownCast(cube)->SetBounds(pt_min.x, pt_max.x, pt_min.y, pt_max.y, pt_min.z, pt_max.z);
+        vtkOutlineSource::SafeDownCast(cube)->SetBounds(min_point.x, max_point.x, min_point.y, max_point.y, min_point.z, max_point.z);
     }
     else
     {
         cube = vtkSmartPointer<vtkCubeSource>::New();
-        vtkCubeSource::SafeDownCast(cube)->SetBounds(pt_min.x, pt_max.x, pt_min.y, pt_max.y, pt_min.z, pt_max.z);
+        vtkCubeSource::SafeDownCast(cube)->SetBounds(min_point.x, max_point.x, min_point.y, max_point.y, min_point.z, max_point.z);
     }
     cube->Update();
 
@@ -620,10 +620,9 @@ cv::viz::WImageOverlay::WImageOverlay(const Mat &image, const Rect &rect)
     vtkSmartPointer<vtkImageMatSource> source = vtkSmartPointer<vtkImageMatSource>::New();
     source->SetImage(image);
 
-    // Need to flip the image as the coordinates are different in OpenCV and VTK
     vtkSmartPointer<vtkImageFlip> flip_filter = vtkSmartPointer<vtkImageFlip>::New();
-    flip_filter->SetFilteredAxis(1); // Vertical flip
     flip_filter->SetInputConnection(source->GetOutputPort());
+    flip_filter->SetFilteredAxis(1);
 
     // Scale the image based on the Rect
     vtkSmartPointer<vtkTransform> transform = vtkSmartPointer<vtkTransform>::New();
@@ -663,13 +662,11 @@ void cv::viz::WImageOverlay::setImage(const Mat &image)
     vtkSmartPointer<vtkImageMatSource> source = vtkSmartPointer<vtkImageMatSource>::New();
     source->SetImage(image);
 
-    // Need to flip the image as the coordinates are different in OpenCV and VTK
-    vtkSmartPointer<vtkImageFlip> flipFilter = vtkSmartPointer<vtkImageFlip>::New();
-    flipFilter->SetFilteredAxis(1); // Vertical flip
-    flipFilter->SetInputConnection(source->GetOutputPort());
-    flipFilter->Update();
+    vtkSmartPointer<vtkImageFlip> flip_filter = vtkSmartPointer<vtkImageFlip>::New();
+    flip_filter->SetInputConnection(source->GetOutputPort());
+    flip_filter->SetFilteredAxis(1);
 
-    mapper->SetInputConnection(flipFilter->GetOutputPort());
+    mapper->SetInputConnection(flip_filter->GetOutputPort());
 }
 
 template<> cv::viz::WImageOverlay cv::viz::Widget::cast<cv::viz::WImageOverlay>()
@@ -681,104 +678,49 @@ template<> cv::viz::WImageOverlay cv::viz::Widget::cast<cv::viz::WImageOverlay>(
 ///////////////////////////////////////////////////////////////////////////////////////////////
 /// image 3D widget implementation
 
-cv::viz::WImage3D::WImage3D(const Mat &image, const Size &size)
+cv::viz::WImage3D::WImage3D(const Mat &image, const Size2d &size)
 {
     CV_Assert(!image.empty() && image.depth() == CV_8U);
 
     vtkSmartPointer<vtkImageMatSource> source = vtkSmartPointer<vtkImageMatSource>::New();
     source->SetImage(image);
 
-    // Need to flip the image as the coordinates are different in OpenCV and VTK
-    vtkSmartPointer<vtkImageFlip> flipFilter = vtkSmartPointer<vtkImageFlip>::New();
-    flipFilter->SetFilteredAxis(1); // Vertical flip
-    flipFilter->SetInputConnection(source->GetOutputPort());
-    flipFilter->Update();
-
-    Vec3d plane_center(size.width * 0.5, size.height * 0.5, 0.0);
+    vtkSmartPointer<vtkTexture> texture = vtkSmartPointer<vtkTexture>::New();
+    texture->SetInputConnection(source->GetOutputPort());
 
     vtkSmartPointer<vtkPlaneSource> plane = vtkSmartPointer<vtkPlaneSource>::New();
-    plane->SetCenter(plane_center[0], plane_center[1], plane_center[2]);
-    plane->SetNormal(0.0, 0.0, 1.0);
-
-    vtkSmartPointer<vtkTransform> transform = vtkSmartPointer<vtkTransform>::New();
-    transform->PreMultiply();
-    transform->Translate(plane_center[0], plane_center[1], plane_center[2]);
-    transform->Scale(size.width, size.height, 1.0);
-    transform->Translate(-plane_center[0], -plane_center[1], -plane_center[2]);
-
-    vtkSmartPointer<vtkTransformPolyDataFilter> transform_filter = vtkSmartPointer<vtkTransformPolyDataFilter>::New();
-    transform_filter->SetTransform(transform);
-    transform_filter->SetInputConnection(plane->GetOutputPort());
-    transform_filter->Update();
-
-    // Apply the texture
-    vtkSmartPointer<vtkTexture> texture = vtkSmartPointer<vtkTexture>::New();
-    texture->SetInputConnection(flipFilter->GetOutputPort());
+    plane->SetOrigin(-0.5 * size.width, -0.5 * size.height, 0.0);
+    plane->SetPoint1( 0.5 * size.width, -0.5 * size.height, 0.0);
+    plane->SetPoint2(-0.5 * size.width,  0.5 * size.height, 0.0);
 
-    vtkSmartPointer<vtkTextureMapToPlane> texturePlane = vtkSmartPointer<vtkTextureMapToPlane>::New();
-    texturePlane->SetInputConnection(transform_filter->GetOutputPort());
+    vtkSmartPointer<vtkTextureMapToPlane> textured_plane = vtkSmartPointer<vtkTextureMapToPlane>::New();
+    textured_plane->SetInputConnection(plane->GetOutputPort());
 
-    vtkSmartPointer<vtkPolyDataMapper> planeMapper = vtkSmartPointer<vtkPolyDataMapper>::New();
-    planeMapper->SetInputConnection(texturePlane->GetOutputPort());
+    vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
+    mapper->SetInputConnection(textured_plane->GetOutputPort());
 
     vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
-    actor->SetMapper(planeMapper);
+    actor->SetMapper(mapper);
     actor->SetTexture(texture);
+    actor->GetProperty()->ShadingOff();
+    actor->GetProperty()->LightingOff();
 
     WidgetAccessor::setProp(*this, actor);
 }
 
-cv::viz::WImage3D::WImage3D(const Vec3d &position, const Vec3d &normal, const Vec3d &up_vector, const Mat &image, const Size &size)
+cv::viz::WImage3D::WImage3D(const Mat &image, const Size2d &size, const Vec3d &center, const Vec3d &normal, const Vec3d &up_vector)
 {
     CV_Assert(!image.empty() && image.depth() == CV_8U);
 
-    // Create the vtk image and set its parameters based on input image
-    vtkSmartPointer<vtkImageMatSource> source = vtkSmartPointer<vtkImageMatSource>::New();
-    source->SetImage(image);
-
-    // Need to flip the image as the coordinates are different in OpenCV and VTK
-    vtkSmartPointer<vtkImageFlip> flipFilter = vtkSmartPointer<vtkImageFlip>::New();
-    flipFilter->SetFilteredAxis(1); // Vertical flip
-    flipFilter->SetInputConnection(source->GetOutputPort());
-    flipFilter->Update();
-
-    vtkSmartPointer<vtkPlaneSource> plane = vtkSmartPointer<vtkPlaneSource>::New();
-    plane->SetCenter(0.0, 0.0, 0.0);
-    plane->SetNormal(0.0, 0.0, 1.0);
-
     // Compute the transformation matrix for drawing the camera frame in a scene
     Vec3d n = normalize(normal);
     Vec3d u = normalize(up_vector.cross(n));
     Vec3d v = n.cross(u);
+    Affine3d pose = makeTransformToGlobal(u, v, n, center);
 
-    Affine3d pose = makeTransformToGlobal(u, v, n, position);
-
-    // Apply the texture
-    vtkSmartPointer<vtkTexture> texture = vtkSmartPointer<vtkTexture>::New();
-    texture->SetInputConnection(flipFilter->GetOutputPort());
-
-    vtkSmartPointer<vtkTextureMapToPlane> texturePlane = vtkSmartPointer<vtkTextureMapToPlane>::New();
-    texturePlane->SetInputConnection(plane->GetOutputPort());
-
-    // Apply the transform after texture mapping
-    vtkSmartPointer<vtkTransform> transform = vtkSmartPointer<vtkTransform>::New();
-    transform->PreMultiply();
-    transform->SetMatrix(vtkmatrix(pose.matrix));
-    transform->Scale(size.width, size.height, 1.0);
-
-    vtkSmartPointer<vtkTransformPolyDataFilter> transform_filter = vtkSmartPointer<vtkTransformPolyDataFilter>::New();
-    transform_filter->SetTransform(transform);
-    transform_filter->SetInputConnection(texturePlane->GetOutputPort());
-    transform_filter->Update();
-
-    vtkSmartPointer<vtkPolyDataMapper> planeMapper = vtkSmartPointer<vtkPolyDataMapper>::New();
-    planeMapper->SetInputConnection(transform_filter->GetOutputPort());
-
-    vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
-    actor->SetMapper(planeMapper);
-    actor->SetTexture(texture);
-
-    WidgetAccessor::setProp(*this, actor);
+    WImage3D image3d(image, size);
+    image3d.applyTransform(pose);
+    *this = image3d;
 }
 
 void cv::viz::WImage3D::setImage(const Mat &image)
@@ -791,15 +733,8 @@ void cv::viz::WImage3D::setImage(const Mat &image)
     vtkSmartPointer<vtkImageMatSource> source = vtkSmartPointer<vtkImageMatSource>::New();
     source->SetImage(image);
 
-    // Need to flip the image as the coordinates are different in OpenCV and VTK
-    vtkSmartPointer<vtkImageFlip> flipFilter = vtkSmartPointer<vtkImageFlip>::New();
-    flipFilter->SetFilteredAxis(1); // Vertical flip
-    flipFilter->SetInputConnection(source->GetOutputPort());
-    flipFilter->Update();
-
-    // Apply the texture
     vtkSmartPointer<vtkTexture> texture = vtkSmartPointer<vtkTexture>::New();
-    texture->SetInputConnection(flipFilter->GetOutputPort());
+    texture->SetInputConnection(source->GetOutputPort());
 
     actor->SetTexture(texture);
 }

modules/viz/src/vizcore.cpp

@@ -305,6 +305,3 @@ void cv::viz::computeNormals(const Mesh& mesh, OutputArray _normals)
 
 
 
-
-
-

modules/viz/src/vizimpl.cpp

@@ -271,7 +271,7 @@ void cv::viz::Viz3d::VizImpl::removeAllWidgets()
 }
 
 /////////////////////////////////////////////////////////////////////////////////////////////
-bool cv::viz::Viz3d::VizImpl::removeActorFromRenderer(const vtkSmartPointer<vtkProp> &actor)
+bool cv::viz::Viz3d::VizImpl::removeActorFromRenderer(vtkSmartPointer<vtkProp> actor)
 {
     vtkProp* actor_to_remove = vtkProp::SafeDownCast(actor);
 

modules/viz/src/vizimpl.hpp

@@ -176,7 +176,7 @@ private:
     /** \brief Boolean that holds whether or not the camera parameters were manually initialized*/
     bool camera_set_;
 
-    bool removeActorFromRenderer(const vtkSmartPointer<vtkProp> &actor);
+    bool removeActorFromRenderer(vtkSmartPointer<vtkProp> actor);
 };
 
 #endif

modules/viz/src/vtk/vtkCloudMatSource.cpp

@@ -212,6 +212,7 @@ template<typename _Tn, typename _Msk>
 void cv::viz::vtkCloudMatSource::filterNanNormalsCopy(const Mat& cloud_normals, const Mat& mask, int total)
 {
     normals = vtkSmartPointer< VtkDepthTraits<_Tn>::array_type >::New();
+    normals->SetName("Normals");
     normals->SetNumberOfComponents(3);
     normals->SetNumberOfTuples(total);
 

modules/viz/src/widget.cpp

@@ -269,6 +269,17 @@ cv::Affine3d cv::viz::Widget3D::getPose() const
     return Affine3d(*actor->GetUserMatrix()->Element);
 }
 
+void cv::viz::Widget3D::applyTransform(const Affine3d &transform)
+{
+    vtkActor *actor = vtkActor::SafeDownCast(WidgetAccessor::getProp(*this));
+    CV_Assert("Widget is not 3D actor." && actor);
+
+    vtkSmartPointer<vtkPolyDataMapper> mapper = vtkPolyDataMapper::SafeDownCast(actor->GetMapper());
+    CV_Assert("Widget doesn't have a polydata mapper" && mapper);
+
+    VtkUtils::SetInputData(mapper, VtkUtils::TransformPolydata(mapper->GetInput(), transform));
+}
+
 void cv::viz::Widget3D::setColor(const Color &color)
 {
     // Cast to actor instead of prop3d since prop3d doesn't provide getproperty

modules/viz/test/tests_simple.cpp

@@ -229,22 +229,44 @@ TEST(Viz, show_overlay_image)
 
     Viz3d viz("show_overlay_image");
     viz.showWidget("coos", WCoordinateSystem());
-    viz.showWidget("img1", WImageOverlay(lena, Rect(Point(0, 0), Size_<double>(viz.getWindowSize()) * 0.5)));
+    viz.showWidget("cube", WCube(Vec3d::all(-0.5), Vec3d::all(0.5)));
+    viz.showWidget("img1", WImageOverlay(lena, Rect(Point(0, 400), Size_<double>(viz.getWindowSize()) * 0.5)));
     viz.showWidget("img2", WImageOverlay(gray, Rect(Point(640, 0), Size_<double>(viz.getWindowSize()) * 0.5)));
-    viz.spin();
+
+    int i = 0;
+    while(!viz.wasStopped())
+    {
+        double a = ++i % 360;
+        Vec3d pose(sin(a * CV_PI/180), 0.7, cos(a * CV_PI/180));
+        viz.setViewerPose(makeCameraPose(pose * 3, Vec3d(0.0, 0.5, 0.0), Vec3d(0.0, 0.1, 0.0)));
+
+        viz.getWidget("img1").cast<WImageOverlay>().setImage(lena * pow(sin(i*10*CV_PI/180) * 0.5 + 0.5, 1.0));
+        //viz.getWidget("img1").cast<WImageOverlay>().setImage(gray);
+        viz.spinOnce(1, true);
+    }
+    //viz.spin();
 }
 
-TEST(Viz, show_image_3d)
+TEST(Viz, DISABLED_show_image_3d)
 {
     Mat lena = imread(Path::combine(cvtest::TS::ptr()->get_data_path(), "lena.png"));
     Mat gray = make_gray(lena);
 
     Viz3d viz("show_image_3d");
-    viz.showWidget("coos", WCoordinateSystem(100));
-    viz.showWidget("img1", WImage3D(lena, Size(lena.cols, lena.rows/2)), makeCameraPose(Vec3d(1.0, 1.0, 1.0), Vec3d::all(0.0), Vec3d(0.0, -1.0, 0.0)));
-    viz.showWidget("img2", WImage3D(Vec3d(1.0, -1.0, 1.0), Vec3d(-1, 1, -1), Vec3d(0.0, -1.0, 0.0), gray, lena.size()));
+    viz.showWidget("coos", WCoordinateSystem());
+    viz.showWidget("cube", WCube(Vec3d::all(-0.5), Vec3d::all(0.5)));
+    viz.showWidget("arr0", WArrow(Vec3d(0.5, 0.0, 0.0), Vec3d(1.5, 0.0, 0.0), 0.009, Color::raspberry()));
+    viz.showWidget("img0", WImage3D(lena, Size2d(1.0, 1.0)), Affine3d(Vec3d(0.0, CV_PI/2, 0.0), Vec3d(.5, 0.0, 0.0)));
+    viz.showWidget("arr1", WArrow(Vec3d(-0.5, -0.5, 0.0), Vec3d(0.2, 0.2, 0.0), 0.009, Color::raspberry()));
+    viz.showWidget("img1", WImage3D(gray, Size2d(1.0, 1.0), Vec3d(-0.5, -0.5, 0.0), Vec3d(1.0, 1.0, 0.0), Vec3d(0.0, 1.0, 0.0)));
 
-    viz.spin();
+    int i = 0;
+    while(!viz.wasStopped())
+    {
+        viz.getWidget("img0").cast<WImage3D>().setImage(lena * pow(sin(i++*7.5*CV_PI/180) * 0.5 + 0.5, 1.0));
+        viz.spinOnce(1, true);
+    }
+    //viz.spin();
 }
 
 TEST(Viz, DISABLED_spin_twice_____________________________TODO_UI_BUG)