Automatic merge of T1.5.1-776-g362e836a2 and 15 pull requests

- Pull request #570 at 3539862: Experimental glTF 2.0 support with PBR lighting
- Pull request #839 at d00beb9: First phase of https://blueprints.launchpad.net/or/+spec/additional-cruise-control-parameters
- Pull request #876 at f92de76: docs: add source for documents previously on website to source Documentation folder
- Pull request #882 at a055bca: Blueprint/train car operations UI window
- Pull request #885 at d9ce84b: feat: Add notifications to Menu
- Pull request #886 at 6c0785b: Scene viewer extension to TrackViewer
- Pull request #892 at 1f5ba4c: Signal Function OPP_SIG_ID_TRAINPATH
- Pull request #893 at bf8876b: Signal errors
- Pull request #894 at 5ff1e73: Correct Decrease Colour
- Pull request #896 at 5866028: First implementation of https://blueprints.launchpad.net/or/+spec/specific-sounds-for-ai-trains
- Pull request #897 at 0a9d939: feat: Improved system information collection
- Pull request #899 at e5db0a2: Duplex steam engines - Booster Engine addition
- Pull request #903 at c5f6638: first phase downloading from Github
- Pull request #904 at 71beb33: fix: adds downgrade to low precision
- Pull request #906 at 0e0aa8b: Bug fix for https://bugs.launchpad.net/or/+bug/2047299 Crash loading a 3Dcab-only loco

Author: openrails-bot

Source/Menu/DownloadContentForm.cs

@@ -23,9 +23,9 @@
 using GNU.Gettext;
 using LibGit2Sharp;
 using ORTS.Settings;
-using Newtonsoft.Json;
 using System.Linq;
-using System.Security.Policy;
+using System.Diagnostics;
+using System.Threading;
 
 namespace ORTS
 {
@@ -79,7 +79,7 @@ void dataGridViewDownloadContent_SelectionChanged(object sender, EventArgs e)
 
         private void InstallPathButton_Click(object sender, EventArgs e)
         {
-            using (var folderBrowser = new FolderBrowserDialog())
+            using (FolderBrowserDialog folderBrowser = new FolderBrowserDialog())
             {
                 folderBrowser.SelectedPath = InstallPathTextBox.Text;
                 folderBrowser.Description = "Main Path where route is to be installed";
@@ -154,19 +154,13 @@ private void DownloadContentButton_Click(object sender, EventArgs e)
             Cursor.Current = Cursors.WaitCursor;
 
             dataGridViewDownloadContent.CurrentRow.Cells[1].Value = Catalog.GetString("Installing...");
-            this.Refresh();
+            Refresh();
 
-            try
-            {
-                Repository.Clone(Routes[RouteName].Url, installPathRoute);
-            }
-            catch (LibGit2SharpException libGit2SharpException)
+            // actual download
+
+            if (!downloadRoute(installPathRoute))
             {
-                {
-                    message = Catalog.GetStringFmt("Error during download: {0}", libGit2SharpException.Message);
-                    MessageBox.Show(message, Catalog.GetString("Attention"), MessageBoxButtons.OK, MessageBoxIcon.Error);
-                    return;
-                }
+                return;
             }
 
             // insert row in Options, tab Content
@@ -228,5 +222,67 @@ private void DownloadContentButton_Click(object sender, EventArgs e)
 
             Close();
         }
+
+        private bool downloadRoute(string installPathRoute)
+        {
+            bool returnValue = false;
+
+            Thread cloneThread = new Thread(() =>
+            {
+                returnValue = doTheClone(installPathRoute);
+            });
+            cloneThread.Start();
+
+            while (cloneThread.IsAlive)
+            {
+                Stopwatch sw = Stopwatch.StartNew();
+
+                TotalBytes = 0;
+                sumMB(installPathRoute);
+                dataGridViewDownloadContent.CurrentRow.Cells[1].Value =
+                    string.Format("downloaded: {0} kB", Math.Round((double)(TotalBytes / 1024)));
+                Refresh();
+
+                while ((cloneThread.IsAlive) && (sw.ElapsedMilliseconds <= 3000)) { }
+            }
+
+            dataGridViewDownloadContent.CurrentRow.Cells[1].Value = "";
+
+            return returnValue;
+        }
+
+        private bool doTheClone(string installPathRoute)
+        {
+            try
+            {
+                Repository.Clone(Routes[RouteName].Url, installPathRoute);
+            }
+            catch (LibGit2SharpException libGit2SharpException)
+            {
+                {
+                    string message = Catalog.GetStringFmt("Error during download: {0}", libGit2SharpException.Message);
+                    MessageBox.Show(message, Catalog.GetString("Attention"), MessageBoxButtons.OK, MessageBoxIcon.Error);
+                    return false;
+                }
+            }
+
+            return true;
+        }
+
+        long TotalBytes = 0;
+
+        private void sumMB(string path)
+        {
+            foreach (string fileName in Directory.GetFiles(path))
+            {
+                TotalBytes += new System.IO.FileInfo(fileName).Length;
+            }
+
+            foreach (string directoryName in Directory.GetDirectories(path))
+            {
+                sumMB(directoryName);
+            }
+        }
     }
+
 }

Source/RunActivity/Viewer3D/DynamicTrack.cs

@@ -710,17 +710,6 @@ public static PitchControls GetPitchControl(string sPitchControl)
 
             }
         }
-
-        /// <summary>
-        /// Marks the generic track profile, so that its textures never get deleted
-        /// </summary>
-        [CallOnThread("Loader")]
-        public void Mark()
-        {
-            foreach (LOD lod in LODs)
-                lod.Mark();
-        }
-
     }
 
     public class LOD

Source/RunActivity/Viewer3D/World.cs

@@ -116,8 +116,6 @@ public void Load()
                     Precipitation.Mark();
                     Terrain.Mark();
                     Scenery.Mark();
-                    Viewer.TRP?.TrackProfile?.Mark();
-                    Viewer.TRP?.TrackProfileTun?.Mark();
                     Trains.Mark();
                     RoadCars.Mark();
                     Containers.Mark();