public static IFCAnyHandle GetOrCreateMaterialSet(ExporterIFC exporterIFC, FamilySymbol familySymbol, IFCAnyHandle typeStyle, MaterialAndProfile materialAndProfile)
{
IFCFile file = exporterIFC.GetFile();
ElementId typeId = familySymbol.Id;
IFCAnyHandle materialSet = ExporterCacheManager.MaterialSetCache.Find(typeId);
if (materialSet == null && materialAndProfile != null)
{
IList <IFCAnyHandle> matProf = new List <IFCAnyHandle>();
foreach (KeyValuePair <ElementId, IFCAnyHandle> MnP in materialAndProfile.GetKeyValuePairs())
{
IFCAnyHandle materialHnd = CategoryUtil.GetOrCreateMaterialHandle(exporterIFC, MnP.Key);
if (materialHnd != null && ExporterCacheManager.ExportOptionsCache.ExportAs4)
{
matProf.Add(IFCInstanceExporter.CreateMaterialProfile(file, MnP.Value, Material: materialHnd));
}
}
if (matProf.Count > 0)
{
materialSet = IFCInstanceExporter.CreateMaterialProfileSet(file, matProf, name: familySymbol.Name);
ExporterCacheManager.MaterialSetCache.Register(typeId, materialSet);
}
}
return(materialSet);
}
/// <summary>
/// Create or add into exsiting relation for a material set from a family symbol.
/// </summary>
/// <param name="exporterIFC">the exporter IFC</param>
/// <param name="familySymbol">the element family symbol</param>
/// <param name="typeStyle">the IFC type object created for the above family symbol</param>
/// <param name="materialAndProfile">a dictionary that keeps the association of the material elementid and the associated profile def</param>
public static void CreateMaterialAssociation(ExporterIFC exporterIFC, FamilySymbol familySymbol, IFCAnyHandle typeStyle, MaterialAndProfile materialAndProfile)
{
ElementId typeId = familySymbol.Id;
IFCAnyHandle materialSet = GetOrCreateMaterialSet(exporterIFC, familySymbol, typeStyle, materialAndProfile);
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(materialSet))
{
ExporterCacheManager.MaterialRelationsCache.Add(materialSet, typeStyle);
}
}