/// <summary>
/// Creates an association between a material handle and an instance handle.
/// </summary>
/// <param name="document">
/// The Revit document.
/// </param>
/// <param name="exporterIFC">
/// The ExporterIFC object.
/// </param>
/// <param name="instanceHandle">
/// The IFC instance handle.
/// </param>
/// <param name="materialId">
/// The material id.
/// </param>
public static void CreateMaterialAssociation(Document doc, ExporterIFC exporterIFC, IFCAnyHandle instanceHandle, ElementId materialId)
{
// Create material association if any.
if (materialId != ElementId.InvalidElementId)
{
IFCAnyHandle materialNameHnd = exporterIFC.FindMaterialHandle(materialId);
if (!materialNameHnd.HasValue)
{
Material material = doc.get_Element(materialId) as Material;
if (material != null)
{
IFCLabel materialName = IFCLabel.Create(material.Name);
materialNameHnd = exporterIFC.GetFile().CreateMaterial(materialName);
exporterIFC.RegisterMaterialHandle(materialId, materialNameHnd);
}
}
if (materialNameHnd.HasValue)
{
exporterIFC.RegisterMaterialRelation(materialNameHnd, instanceHandle);
}
}
}