Create dimension based on the column center

[Anonymous]

Hi

I used below code to create a Dimension.

Reference refElement0 = sel.PickObject(ObjectType.Element, "selectColumn0");
            Reference refElement1 = sel.PickObject(ObjectType.Element, "selectColumn1");
            FamilyInstance familyInstance0 = Doc.GetElement(refElement0) as FamilyInstance;
            FamilyInstance familyInstance1 = Doc.GetElement(refElement1) as FamilyInstance;

            FaceArray faces0 = GetFaceArrayOfFamilyInstance(familyInstance0);
            FaceArray faces1 = GetFaceArrayOfFamilyInstance(familyInstance1);
            Face face0 = null;
            Face face1 = null;
            foreach (Face face in faces0)
            {
                XYZ faceNormal = GetFaceNormal(face);
                if (faceNormal.IsAlmostEqualTo(new XYZ(0, -1, 0)))
                {
                    face0 = face;
                    break;
                }
            }

            foreach (Face face in faces1)
            {
                XYZ faceNormal = GetFaceNormal(face);
                if (faceNormal.IsAlmostEqualTo(new XYZ(0, -1, 0)))
                {
                    face1 = face;
                    break;
                }
            }
            ReferenceArray refArray = new ReferenceArray();
            refArray.Append(face0.Reference);
            refArray.Append(face1.Reference);

            using (Transaction t = new Transaction(Doc, "CreateDimension"))
            {
                t.Start();
                LocationPoint locationPoint0 = familyInstance0.Location as LocationPoint;
                LocationPoint locationPoint1 = familyInstance1.Location as LocationPoint;
                Line lineDimension = Line.CreateBound(locationPoint0.Point, locationPoint1.Point);
                Doc.Create.NewDimension(Doc.ActiveView, lineDimension, refArray);
                t.Commit();
            }

As expected,the reslut is like below:

But.. I really want is like below ..which is to create dimension based on the column center like manually createing the dimension from revit UI (can select the center line of a column). And what does this bule line represent, Face? Plane? Line?

Any idea on how to implement this? Thx!

[jeremytammik · Accepted solution]

Yes, I hope so.

Check out this recent discussion:

http://thebuildingcoder.typepad.com/blog/2017/05/api-access-to-family-instance-references.html

I hope it helps.

Please let us know how it goes and how you end up resolving this.

Thank you!

Cheers,

Jeremy

[Anonymous]

Hi Jeremy,

Sorry for the late reply.

I refered to Picking Pairs and Dimensioning Family Instance Origin and get the column origin line for creating the dimension. It worked.

Thanks a lot!