What am I doing Wrong - FindReferencesInRevitLinks

[sanjaymann]

Hi,

So here is the scenario. I have a file with a single rectangular beam[str.rvt]. Then I have another file[arch.rvt] in which I have linked the file with a single beam. I create a wall in arch.rvt in a way that the beam passes through the wall. With my main document being arch.rvt and linked model being str.rvt I try to find the elements which intersect/touches/crosses and the intersecting points with the following code which doesn't return the beam;

foreach (Wall wall in new FilteredElementCollector(doc).OfClass(typeof(Wall))) {

Dictionary<Reference, XYZ> dict = GetIntersectPoints(doc, wall);
}


public Dictionary<Reference, XYZ> GetIntersectPoints(
  Document doc,
  Element intersect)
        {
            // Find a 3D view to use for the 
            // ReferenceIntersector constructor.

            FilteredElementCollector collector
              = new FilteredElementCollector(doc);

            Func<View3D, bool> isNotTemplate = v3
              => !(v3.IsTemplate);

            View3D view3D = collector
              .OfClass(typeof(View3D))
              .Cast<View3D>()
              .First<View3D>(isNotTemplate);

            // Use location point as start point for intersector.

            LocationCurve lp = intersect.Location as LocationCurve;
            XYZ startPoint = lp.Curve.GetEndPoint(0) as XYZ;
            XYZ endPoint = lp.Curve.GetEndPoint(1) as XYZ;

            // Shoot intersector along element.

            XYZ rayDirection = endPoint.Subtract(
              startPoint).Normalize();

            List<BuiltInCategory> builtInCats
              = new List<BuiltInCategory>();

            builtInCats.Add(BuiltInCategory.OST_StructuralFraming);
            

            ElementMulticategoryFilter intersectFilter
              = new ElementMulticategoryFilter(builtInCats);

            ReferenceIntersector refIntersector
              = new ReferenceIntersector(intersectFilter,
                FindReferenceTarget.All, view3D);

            refIntersector.FindReferencesInRevitLinks = true;

            IList<ReferenceWithContext> referencesWithContext
              = refIntersector.Find(startPoint,
                rayDirection);

            IList<XYZ> intersectPoints = new List<XYZ>();

            IList<Reference> intersectRefs
              = new List<Reference>();

            Dictionary<Reference, XYZ> dictProvisionForVoidRefs
              = new Dictionary<Reference, XYZ>();

            foreach (ReferenceWithContext r in
              referencesWithContext)
            {

                dictProvisionForVoidRefs.Add(r.GetReference(),
                  r.GetReference().GlobalPoint);
            }
            return dictProvisionForVoidRefs;
        }

Thanks & Regards

Sanjay Pandey

[jeremytammik]

I assume that the reference intersector view must belong to the same document as the element you are searching for.

If you have a linked file, you will probably have to translate the wall bounding box back into the corresponding location in the linked file coordinate system.

Just guessing!

Cheers,

Jeremy

[Revitalizer]

Hi,

maybe you need to add

builtInCats.Add(BuiltInCategory.OST_RvtLinks);

to find also the RevitLinkInstances themselves.

Revitalizer

[sanjaymann]

Hi,

Tried but same result

Thanks & Regards

Sanjay Pandey

[Revitalizer]

Hi,

the Wall's location line is on its bottom.

You will never find the beam if it does not really cross this ray.

So either you use a set of rays inside the wall and parallel to the wall's location curve, like a comb, like the horizontal lines in the letter E.

Or you can change the approach by using the beam's curve to find the wall(s) it hits.

Revitalizer

[Revitalizer]

Hi,

things may become much clearer if you display the lines as ModelCurves.

So you can easily see the Wall's location curve and the ray you use.

Revitalizer