Improve code readability

Author: rhaschke

src/rviz/ogre_helpers/point_cloud.cpp

@@ -446,29 +446,22 @@ void PointCloud::addPoints(Point* points, uint32_t num_points)
   }
   else
   {
-    if (render_mode_ == RM_POINTS)
+    switch (render_mode_)
     {
+    case RM_POINTS:
       vertices = g_point_vertices;
-    }
-    else if (render_mode_ == RM_SQUARES)
-    {
-      vertices = g_billboard_vertices;
-    }
-    else if (render_mode_ == RM_FLAT_SQUARES)
-    {
+      break;
+    case RM_SQUARES:
+    case RM_FLAT_SQUARES:
+    case RM_TILES:
       vertices = g_billboard_vertices;
-    }
-    else if (render_mode_ == RM_SPHERES)
-    {
+      break;
+    case RM_SPHERES:
       vertices = g_billboard_sphere_vertices;
-    }
-    else if (render_mode_ == RM_TILES)
-    {
-      vertices = g_billboard_vertices;
-    }
-    else if (render_mode_ == RM_BOXES)
-    {
+      break;
+    case RM_BOXES:
       vertices = g_box_vertices;
+      break;
     }
   }