fixed bugs in cloud collection and added test

modules/viz/doc/viz3d.rst

@@ -482,19 +482,19 @@ This class wraps mesh attributes, and it can load a mesh from a ``ply`` file. ::
         Mat polygons;
 
         //! Loads mesh from a given ply file
-        static Mesh3d loadMesh(const String& file);
+        static Mesh3d load(const String& file);
 
     private:
         /* hidden */
     };
 
-viz::Mesh3d::loadMesh
+viz::Mesh3d::load
 ---------------------
 Loads a mesh from a ``ply`` file.
 
-.. ocv:function:: static Mesh3d loadMesh(const String& file)
+.. ocv:function:: static Mesh3d load(const String& file)
 
-    :param file: File name.
+    :param file: File name (for no only PLY is supported)
 
 
 viz::KeyboardEvent

modules/viz/include/opencv2/viz/types.hpp

@@ -112,7 +112,7 @@ namespace cv
             Mat polygons;
 
             //! Loads mesh from a given ply file
-            static Mesh3d loadMesh(const String& file);
+            static Mesh3d load(const String& file);
         };
 
         class CV_EXPORTS Camera

modules/viz/src/types.cpp

@@ -128,7 +128,7 @@ namespace cv { namespace viz { namespace
     };
 }}}
 
-cv::viz::Mesh3d cv::viz::Mesh3d::loadMesh(const String& file)
+cv::viz::Mesh3d cv::viz::Mesh3d::load(const String& file)
 {
     return MeshUtils::loadMesh(file);
 }

modules/viz/test/tests_simple.cpp

@@ -85,3 +85,18 @@ TEST(Viz, DISABLED_show_cloud_masked)
     viz.showWidget("dragon", WCloud(dragon_cloud));
     viz.spin();
 }
+
+TEST(Viz, DISABLED_show_cloud_collection)
+{
+    Mat cloud = readCloud(get_dragon_ply_file_path());
+
+    WCloudCollection ccol;
+    ccol.addCloud(cloud, Color::white(), Affine3d().translate(Vec3d(0, 0, 0)).rotate(Vec3d(1.57, 0, 0)));
+    ccol.addCloud(cloud, Color::blue(),  Affine3d().translate(Vec3d(1, 0, 0)));
+    ccol.addCloud(cloud, Color::red(),   Affine3d().translate(Vec3d(2, 0, 0)));
+
+    Viz3d viz("show_cloud_collection");
+    viz.showWidget("coosys", WCoordinateSystem());
+    viz.showWidget("ccol", ccol);
+    viz.spin();
+}