refactored Mesh, added tests, added failing "twice spin()" test

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

@@ -65,14 +65,14 @@ namespace cv
             SHADING
         };
 
-        enum RenderingRepresentationProperties
+        enum RepresentationValues
         {
             REPRESENTATION_POINTS,
             REPRESENTATION_WIREFRAME,
             REPRESENTATION_SURFACE
         };
 
-        enum ShadingRepresentationProperties
+        enum ShadingValues
         {
             SHADING_FLAT,
             SHADING_GOURAUD,

modules/viz/src/vtk/vtkCloudMatSource.cpp

@@ -163,14 +163,14 @@ int cv::viz::vtkCloudMatSource::filterNanCopy(const Mat& cloud)
     points->Allocate(cloud.total());
     points->SetNumberOfPoints(cloud.total());
 
-    int cn = cloud.channels();
+    int s_chs = cloud.channels();
     int total = 0;
     for (int y = 0; y < cloud.rows; ++y)
     {
         const _Tp* srow = cloud.ptr<_Tp>(y);
-        const _Tp* send = srow + cloud.cols * cn;
+        const _Tp* send = srow + cloud.cols * s_chs;
 
-        for (; srow != send; srow += cn)
+        for (; srow != send; srow += s_chs)
             if (!isNan(srow))
                 points->SetPoint(total++, srow);
     }

modules/viz/test/tests_simple.cpp

@@ -100,3 +100,37 @@ TEST(Viz, DISABLED_show_cloud_collection)
     viz.showWidget("ccol", ccol);
     viz.spin();
 }
+
+TEST(Viz, DISABLED_show_mesh)
+{
+    Mesh3d mesh = Mesh3d::load(get_dragon_ply_file_path());
+
+    Viz3d viz("show_mesh");
+    viz.showWidget("coosys", WCoordinateSystem());
+    viz.showWidget("mesh", WMesh(mesh));
+    viz.spin();
+}
+
+TEST(Viz, DISABLED_show_mesh_random_colors)
+{
+    Mesh3d mesh = Mesh3d::load(get_dragon_ply_file_path());
+    theRNG().fill(mesh.colors, RNG::UNIFORM, 0, 255);
+
+    Viz3d viz("show_mesh_random_color");
+    viz.showWidget("coosys", WCoordinateSystem());
+    viz.showWidget("mesh", WMesh(mesh));
+    viz.setRenderingProperty("mesh", SHADING, SHADING_PHONG);
+    viz.spin();
+}
+
+TEST(Viz, DISABLED_spin_twice_____________________________TODO_UI_BUG)
+{
+    Mesh3d mesh = Mesh3d::load(get_dragon_ply_file_path());
+
+    Viz3d viz("spin_twice");
+    viz.showWidget("coosys", WCoordinateSystem());
+    viz.showWidget("mesh", WMesh(mesh));
+    viz.spin();
+    viz.spin();
+}
+