/// <summary>
/// Get or Create (if not yet exists) a handle for IfcMaterialConstituent. It points to an IfcMaterial
/// </summary>
/// <param name="exporterIFC"></param>
/// <param name="materialId"></param>
/// <returns>The Handle to IfcMaterialConstituent</returns>
public static IFCAnyHandle GetOrCreateMaterialConstituent(ExporterIFC exporterIFC, MaterialConstituentInfo constInfo)
{
IFCAnyHandle materialConstituentHandle = ExporterCacheManager.MaterialConstituentCache.Find(constInfo);
if (IFCAnyHandleUtil.IsNullOrHasNoValue(materialConstituentHandle))
{
Document document = ExporterCacheManager.Document;
IFCAnyHandle materialHnd = GetOrCreateMaterialHandle(exporterIFC, constInfo.MaterialId);
Material material = document.GetElement(constInfo.MaterialId) as Material;
string category = (material != null) ? NamingUtil.GetMaterialCategoryName(material) : string.Empty;
materialConstituentHandle = IFCInstanceExporter.CreateMaterialConstituent(exporterIFC.GetFile(), materialHnd, name: constInfo.ComponentCat, category: category);
ExporterCacheManager.MaterialConstituentCache.Register(constInfo, materialConstituentHandle);
}
return(materialConstituentHandle);
}
/// <summary>
/// Gets material handle from material id or creates one if there is none.
/// </summary>
/// <param name="exporterIFC">The ExporterIFC object.</param>
/// <param name="materialId">The material id.</param>
/// <returns>The handle.</returns>
public static IFCAnyHandle GetOrCreateMaterialHandle(ExporterIFC exporterIFC, ElementId materialId)
{
Document document = ExporterCacheManager.Document;
IFCAnyHandle materialNameHandle = ExporterCacheManager.MaterialHandleCache.Find(materialId);
if (IFCAnyHandleUtil.IsNullOrHasNoValue(materialNameHandle))
{
string materialName = "<Unnamed>";
string description = null;
string category = null;
if (materialId != ElementId.InvalidElementId)
{
Material material = document.GetElement(materialId) as Material;
if (material != null)
{
materialName = NamingUtil.GetMaterialName(material);
if (ExporterCacheManager.ExportOptionsCache.ExportAs4)
{
category = NamingUtil.GetMaterialCategoryName(material);
description = NamingUtil.GetOverrideStringValue(material, "IfcDescription", null);
}
}
}
IFCFile file = exporterIFC.GetFile();
materialNameHandle = IFCInstanceExporter.CreateMaterial(file, materialName, description: description, category: category);
ExporterCacheManager.MaterialHandleCache.Register(materialId, materialNameHandle);
// associate Material with SurfaceStyle if necessary.
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;
// TODO_DOUBLE_PATTERN - deal with background pattern
ElementId fillPatternId = (matElem != null) ? matElem.CutForegroundPatternId : ElementId.InvalidElementId;
Color color = (matElem != null) ? GetSafeColor(matElem.CutForegroundPatternColor) : new Color(0, 0, 0);
double planScale = 100.0;
HashSet <IFCAnyHandle> styles = new HashSet <IFCAnyHandle>();
bool hasFill = false;
IFCAnyHandle styledRepItem = null;
IFCAnyHandle matStyleHnd = GetOrCreateMaterialStyle(document, file, materialId);
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(matStyleHnd) && !ExporterCacheManager.ExportOptionsCache.ExportAs4ReferenceView)
{
styles.Add(matStyleHnd);
bool supportCutStyles = !ExporterCacheManager.ExportOptionsCache.ExportAsCoordinationView2;
if (fillPatternId != ElementId.InvalidElementId && supportCutStyles)
{
IFCAnyHandle cutStyleHnd = exporterIFC.GetOrCreateFillPattern(fillPatternId, color, planScale);
if (cutStyleHnd.HasValue)
{
styles.Add(cutStyleHnd);
hasFill = true;
}
}
IFCAnyHandle styledItemHnd;
if (ExporterCacheManager.ExportOptionsCache.ExportAsOlderThanIFC4)
{
IFCAnyHandle presStyleHnd = IFCInstanceExporter.CreatePresentationStyleAssignment(file, styles);
HashSet <IFCAnyHandle> presStyleSet = new HashSet <IFCAnyHandle>();
presStyleSet.Add(presStyleHnd);
styledItemHnd = IFCInstanceExporter.CreateStyledItem(file, styledRepItem, presStyleSet, null);
}
else
{
styledItemHnd = IFCInstanceExporter.CreateStyledItem(file, styledRepItem, styles, 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);
}
