private Dictionary <int, LinkedInstanceData> GetLinkedInstancesInfo()
{
Dictionary <int, LinkedInstanceData> linkedInstances = new Dictionary <int, LinkedInstanceData>();
try
{
FilteredElementCollector collector = new FilteredElementCollector(m_doc);
List <RevitLinkInstance> revitLinkInstances = collector.OfCategory(BuiltInCategory.OST_RvtLinks).WhereElementIsNotElementType().Cast <RevitLinkInstance>().ToList();
foreach (RevitLinkInstance instance in revitLinkInstances)
{
if (null != instance.Document)
{
LinkedInstanceData lid = new LinkedInstanceData(instance);
if (!linkedInstances.ContainsKey(lid.InstanceId))
{
linkedInstances.Add(lid.InstanceId, lid);
}
}
}
}
catch (Exception ex)
{
MessageBox.Show("Failed to get the information of linked instances.\n" + ex.Message, "Find Linked Instances", MessageBoxButton.OK, MessageBoxImage.Warning);
}
return(linkedInstances);
}
private bool CheckVisibilityByMaterial(ReferenceIntersector intersector, XYZ pointOrigin, List <XYZ> viewPoints)
{
bool visible = false;
try
{
foreach (XYZ vPt in viewPoints)
{
XYZ direction = vPt - pointOrigin;
IList <ReferenceWithContext> contexts = intersector.Find(pointOrigin, direction);
if (null != contexts)
{
var filteredContexts = from context in contexts where context.Proximity > epsilon select context;
filteredContexts = filteredContexts.OrderBy(x => x.Proximity).ToList();
if (filteredContexts.Count() > 0)
{
visible = true;
foreach (ReferenceWithContext context in filteredContexts)
{
Reference reference = context.GetReference();
Element element = null;
Transform transform = Transform.Identity;
if (reference.LinkedElementId != ElementId.InvalidElementId)
{
//element from linked models
if (linkedInstances.ContainsKey(reference.ElementId.IntegerValue))
{
LinkedInstanceData lid = linkedInstances[reference.ElementId.IntegerValue];
element = lid.LinkedDocument.GetElement(reference.LinkedElementId);
transform = lid.TransformValue;
}
}
else
{
//element from host
element = m_doc.GetElement(reference.ElementId);
}
if (null != element)
{
int categoryId = element.Category.Id.IntegerValue;
if (categoryId == (int)BuiltInCategory.OST_Walls)
{
Wall wall = element as Wall;
if (null != wall)
{
if (wall.WallType.Kind != WallKind.Curtain)
{
visible = false; break;
}
else
{
var exteriorWalls = from exWall in exteriorElementIds
where exWall.LinkInstanceId == reference.ElementId && (exWall.HostElementId == reference.LinkedElementId || exWall.LinkedElementId == reference.LinkedElementId)
select exWall;
if (exteriorWalls.Count() > 0)
{
break; //exterior curtain walls
}
}
}
else
{
//family instance of wall
visible = false; break;
}
}
else if (categoryId == (int)BuiltInCategory.OST_StructuralColumns)
{
visible = false; break;
}
else if (categoryId == (int)BuiltInCategory.OST_Windows || categoryId == (int)BuiltInCategory.OST_Doors || categoryId == (int)BuiltInCategory.OST_CurtainWallPanels)
{
Face face = FindFaceByReference(element, reference, transform);
if (null != face)
{
if (face.MaterialElementId != ElementId.InvalidElementId)
{
Material material = element.Document.GetElement(face.MaterialElementId) as Material;
if (material.Transparency < minTransparency)
{
visible = false; break;
}
}
}
FamilyInstance instance = element as FamilyInstance;
if (null != instance)
{
if (null != instance.Host)
{
ElementId wallId = instance.Host.Id;
var exteriorWalls = from exWall in exteriorElementIds
where exWall.LinkInstanceId == reference.ElementId && (exWall.HostElementId == wallId || exWall.LinkedElementId == wallId)
select exWall;
if (exteriorWalls.Count() > 0)
{
break; //exterior curtain walls
}
}
}
}
}
}
if (visible)
{
break; //at least one direction should be visible
}
}
}
}
}
catch (Exception ex)
{
string message = ex.Message;
}
return(visible);
}
