public static void AddElements(this MeshGeometry3D m, IPersistIfcEntity item, XbimMatrix3D wcsTransform)
{
var fromModel = item.ModelOf as XbimModel;
if (fromModel == null || !(item is IfcProduct))
return;
switch (fromModel.GeometrySupportLevel)
{
case 2:
var context = new Xbim3DModelContext(fromModel);
var productShape = context.ShapeInstancesOf((IfcProduct) item)
.Where(s => s.RepresentationType != XbimGeometryRepresentationType.OpeningsAndAdditionsExcluded)
.ToList();
if (!productShape.Any() && item is IfcFeatureElement)
{
productShape = context.ShapeInstancesOf((IfcProduct) item)
.Where(
s => s.RepresentationType == XbimGeometryRepresentationType.OpeningsAndAdditionsExcluded)
.ToList();
}
if (!productShape.Any())
return;
foreach (var shapeInstance in productShape)
{
IXbimShapeGeometryData shapeGeom =
context.ShapeGeometry(shapeInstance.ShapeGeometryLabel);
switch ((XbimGeometryType) shapeGeom.Format)
{
case XbimGeometryType.PolyhedronBinary:
m.Read(shapeGeom.ShapeData,
XbimMatrix3D.Multiply(shapeInstance.Transformation, wcsTransform));
break;
case XbimGeometryType.Polyhedron:
m.Read(((XbimShapeGeometry) shapeGeom).ShapeData,
XbimMatrix3D.Multiply(shapeInstance.Transformation, wcsTransform));
break;
}
}
break;
case 1:
var xm3d = new XbimMeshGeometry3D();
var geomDataSet = fromModel.GetGeometryData(item.EntityLabel, XbimGeometryType.TriangulatedMesh);
foreach (var geomData in geomDataSet)
{
var gd = geomData.TransformBy(wcsTransform);
xm3d.Add(gd);
}
m.Add(xm3d);
break;
}
}
public IXbimMeshGeometry3D GetVisibleMeshGeometry3D(int entityLabel, short modelId)
{
var fragments = GetMeshFragments(entityLabel).ToArray(); //get all the fragments for this entity in the visible layer
var maxSize = fragments.Sum(f => f.PositionCount);
var geometry = new XbimMeshGeometry3D(maxSize);
foreach (var fragment in fragments)
{
var geom = Visible.GetMeshGeometry3D(fragment);
geometry.Add(geom, fragment.EntityLabel, fragment.EntityType, modelId);
}
return(geometry);
}
/// <summary>
/// Gets the geometry of an entity building it up from layers.
/// </summary>
/// <param name="entity">The entity instance</param>
public IXbimMeshGeometry3D GetMeshGeometry3D(IPersistIfcEntity entity, short modelId)
{
var geometry = new XbimMeshGeometry3D();
IModel m = entity.ModelOf;
foreach (var layer in Layers)
{
// an entity model could be spread across many layers (e.g. in case of different materials)
if (layer.Model == m)
{
geometry.Add(layer.GetVisibleMeshGeometry3D(entity.EntityLabel, modelId));
}
}
return(geometry);
}
