public static void ActivateInstance(Document InDocument)
{
// Disable existing instance, if there's active one.
ActiveInstance?.MakeActive(false);
ActiveInstance = null;
// Find out if we already have instance for this document and
// activate it if we do. Otherwise, create new one.
FDirectLink InstanceToActivate = null;
foreach (FDirectLink DL in Instances)
{
if (DL.RootCache.SourceDocument.Equals(InDocument))
{
InstanceToActivate = DL;
break;
}
}
if (InstanceToActivate == null)
{
InstanceToActivate = new FDirectLink(InDocument);
Instances.Add(InstanceToActivate);
}
InstanceToActivate.MakeActive(true);
ActiveInstance = InstanceToActivate;
}
public static void DestroyInstance(FDirectLink Instance, Application InApp)
{
if (ActiveInstance == Instance)
{
ActiveInstance = null;
}
Instances.Remove(Instance);
Instance?.Destroy(InApp);
}
static void OnViewActivated(object sender, ViewActivatedEventArgs e)
{
View Previous = e.PreviousActiveView;
View Current = e.CurrentActiveView;
if (Previous == null || !Previous.Document.Equals(Current.Document))
{
FDirectLink.ActivateInstance(Current.Document);
}
}
public FDatasmithRevitExportContext(
Application InApplication, // running Revit application
Document InDocument, // active Revit document
Dictionary <ElementId, string> InDatasmithFilePaths, // Datasmith output file path
DatasmithRevitExportOptions InExportOptions, // Unreal Datasmith export options
FDirectLink InDirectLink // DirectLink manager
)
{
ProductVersion = InApplication.VersionNumber;
DatasmithFilePaths = InDatasmithFilePaths;
RevitDocument = InDocument;
DirectLink = InDirectLink;
// Get the Unreal Datasmith export options.
DebugLog = InExportOptions.GetWriteLogFile() ? new FDatasmithFacadeLog() : null;
LevelOfTessellation = InExportOptions.GetLevelOfTessellation();
}
public static void OnDocumentChanged(
object InSender,
DocumentChangedEventArgs InArgs)
{
FDirectLink DirectLink = FDirectLink.Get();
Debug.Assert(DirectLink != null);
// Handle modified elements
foreach (ElementId ElemId in InArgs.GetModifiedElementIds())
{
Element ModifiedElement = DirectLink.RootCache.SourceDocument.GetElement(ElemId);
if (ModifiedElement.GetType() == typeof(RevitLinkInstance))
{
DirectLink.ModifiedLinkedDocuments.Add((ModifiedElement as RevitLinkInstance).GetLinkDocument());
}
DirectLink.RootCache.ModifiedElements.Add(ElemId);
}
}
static void OnDocumentClosing(object sender, DocumentClosingEventArgs e)
{
FDirectLink.DestroyInstance(FDirectLink.FindInstance(e.Document), e.Document.Application);
}
public override Result OnExecute(ExternalCommandData InCommandData, ref string OutCommandMessage, ElementSet OutElements)
{
UIDocument UIDoc = InCommandData.Application.ActiveUIDocument;
Document Doc = UIDoc.Document;
View3D ActiveView = Doc.ActiveView as View3D;
if (ActiveView == null)
{
string Message = "You must be in a 3D view to export.";
MessageBox.Show(Message, DIALOG_CAPTION, MessageBoxButtons.OK, MessageBoxIcon.Warning);
return(Result.Cancelled);
}
if (ActiveView.IsTemplate || !ActiveView.CanBePrinted)
{
string Message = "The active 3D view cannot be exported.";
MessageBox.Show(Message, DIALOG_CAPTION, MessageBoxButtons.OK, MessageBoxIcon.Warning);
return(Result.Cancelled);
}
Debug.Assert(FDirectLink.Get() != null);
// Holding ctrl will force full sync.
if (FDirectLink.Get().SyncCount > 0 && (System.Windows.Forms.Control.ModifierKeys & Keys.Control) == Keys.Control)
{
FDirectLink.DestroyInstance(FDirectLink.Get(), InCommandData.Application.Application);
FDirectLink.ActivateInstance(Doc);
}
FDatasmithRevitExportContext ExportContext = new FDatasmithRevitExportContext(
InCommandData.Application.Application,
Doc,
null,
new DatasmithRevitExportOptions(Doc),
FDirectLink.Get());
// Export the active 3D View to the given Unreal Datasmith file.
using (CustomExporter Exporter = new CustomExporter(Doc, ExportContext))
{
try
{
// The export process will exclude output of geometric objects such as faces and curves,
// but the context needs to receive the calls related to Faces or Curves to gather data.
// The context always receive their tessellated geometry in form of polymeshes or lines.
Exporter.IncludeGeometricObjects = true;
// The export process should stop in case an error occurs during any of the exporting methods.
Exporter.ShouldStopOnError = true;
#if REVIT_API_2020
Exporter.Export(ActiveView as Autodesk.Revit.DB.View);
#else
Exporter.Export(ActiveView);
#endif
}
catch (System.Exception exception)
{
OutCommandMessage = string.Format("Cannot export the 3D view:\n\n{0}\n\n{1}", exception.Message, exception.StackTrace);
MessageBox.Show(OutCommandMessage, DIALOG_CAPTION, MessageBoxButtons.OK, MessageBoxIcon.Error);
return(Result.Failed);
}
finally
{
if (ExportContext.GetMessages().Count > 0)
{
string Messages = string.Join($"{System.Environment.NewLine}", ExportContext.GetMessages());
DatasmithRevitApplication.SetExportMessages(Messages);
}
}
}
return(Result.Succeeded);
}