/// <summary>
/// Gets material handle from material id or creates one if there is none.
/// </summary>
/// <param name="document">
/// The Revit document.
/// </param>
/// <param name="exporterIFC">
/// The ExporterIFC object.
/// </param>
/// <param name="materialId">
/// The material id.
/// </param>
/// <returns>
/// The handle.
/// </returns>
public static IFCAnyHandle GetOrCreateMaterialHandle(Document document, ExporterIFC exporterIFC, ElementId materialId)
{
IFCAnyHandle materialNameHandle = null;
materialNameHandle = ExporterCacheManager.MaterialHandleCache.Find(materialId);
if (IFCAnyHandleUtil.IsNullOrHasNoValue(materialNameHandle))
{
string materialName = " <Unnamed>";
if (materialId != ElementId.InvalidElementId)
{
Material material = document.GetElement(materialId) as Material;
if (material != null)
{
materialName = material.Name;
}
}
materialNameHandle = IFCInstanceExporter.CreateMaterial(exporterIFC.GetFile(), materialName);
ExporterCacheManager.MaterialHandleCache.Register(materialId, materialNameHandle);
// associate Material with SurfaceStyle if necessary.
IFCFile file = exporterIFC.GetFile();
if (materialId != ElementId.InvalidElementId && !ExporterCacheManager.ExportOptionsCache.ExportAs2x2 && materialNameHandle.HasValue)
{
HashSet <IFCAnyHandle> matRepHandles = IFCAnyHandleUtil.GetHasRepresentation(materialNameHandle);
if (matRepHandles.Count == 0)
{
Material matElem = document.GetElement(materialId) as Material;
ElementId fillPatternId = (matElem != null) ? matElem.GetCutPatternId() : ElementId.InvalidElementId;
Autodesk.Revit.DB.Color color = (matElem != null) ? matElem.GetCutPatternColor() : new Color(0, 0, 0);
double planScale = 100.0;
HashSet <IFCAnyHandle> styles = new HashSet <IFCAnyHandle>();
bool hasFill = false;
IFCAnyHandle styledRepItem = null;
IFCAnyHandle matStyleHnd = CategoryUtil.GetOrCreateMaterialStyle(document, exporterIFC, materialId);
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(matStyleHnd))
{
styles.Add(matStyleHnd);
if (fillPatternId != ElementId.InvalidElementId && !ExporterCacheManager.ExportOptionsCache.ExportAs2x3CoordinationView2)
{
IFCAnyHandle cutStyleHnd = exporterIFC.GetOrCreateFillPattern(fillPatternId, color, planScale);
if (cutStyleHnd.HasValue)
{
styles.Add(cutStyleHnd);
hasFill = true;
}
}
IFCAnyHandle presStyleHnd = IFCInstanceExporter.CreatePresentationStyleAssignment(file, styles);
HashSet <IFCAnyHandle> presStyleSet = new HashSet <IFCAnyHandle>();
presStyleSet.Add(presStyleHnd);
IFCAnyHandle styledItemHnd = IFCInstanceExporter.CreateStyledItem(file, styledRepItem, presStyleSet, null);
IFCAnyHandle contextOfItems = exporterIFC.Get3DContextHandle("");
string repId = "Style";
string repType = (hasFill) ? "Material and Cut Pattern" : "Material";
HashSet <IFCAnyHandle> repItems = new HashSet <IFCAnyHandle>();
repItems.Add(styledItemHnd);
IFCAnyHandle styleRepHnd = IFCInstanceExporter.CreateStyledRepresentation(file, contextOfItems, repId, repType, repItems);
List <IFCAnyHandle> repList = new List <IFCAnyHandle>();
repList.Add(styleRepHnd);
IFCAnyHandle matDefRepHnd = IFCInstanceExporter.CreateMaterialDefinitionRepresentation(file, null, null, repList, materialNameHandle);
}
}
}
}
return(materialNameHandle);
}
