topic Re: Finding Tag'sleader start andend point in Revit API Forum

Finding Tag'sleader start andend point

Hans_Dwe — Wed, 26 Jul 2023 14:29:59 GMT

Hallo ! i have a quesion relating to Tags, i am trying to move the Tag's head to a center of a grid point, but in order to move it correctly i need to find the coordination of the leaderstart point and leaderend point. is there to method to find this out? as well what the boundingbox of the tags is it the TagsHead only or as well including the Leaders ? thank you so much !

Re: Finding Tag'sleader start andend point

jeremy_tammik — Wed, 26 Jul 2023 17:39:15 GMT

Have you checked what properties and relationship of your tags can be inspected using RevitLookup? That would be the standard approach to this programming task:

https://thebuildingcoder.typepad.com/blog/2017/01/virtues-of-reproduction-research-mep-settings-ontology.html#3

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Hans_Dwe — Thu, 27 Jul 2023 09:46:08 GMT

Hallo @jeremy_tammik, i checked it, i found only the position of the Stag's Head, my problem is that i am trying to move the tags, but somehow the moving of the tags while its has a leader are not predictable. if this is way to find the leader points are not possible, is it possible to create the tags without leader then move it and create the leader after that or not?

thank you

Re: Finding Tag'sleader start andend point

Mohamed_Arshad — Thu, 27 Jul 2023 14:19:49 GMT

Hi @Hans_Dwe
At Which Point you need to move the Tag? Can you please show case the point which tag need to move and place.

I saw some similar post regarding moving the Tag. Kindly check the below link.

URL : https://forums.autodesk.com/t5/revit-api-forum/revit-tag-point-of-origin/td-p/10791943

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Hans_Dwe — Fri, 28 Jul 2023 11:32:07 GMT

Hi @Mohamed_Arshad

i am trying to move the Tagshead to center point of Grid, somehow the center of the Head tags are not in the center, and the leader distance affects that the tag placed propely over the grid.

this

to this

Betreff: Finding Tag'sleader start andend point

Mohamed_Arshad — Sat, 29 Jul 2023 11:38:27 GMT

HI @Hans_Dwe

its a floor texture grid?

Betreff: Finding Tag'sleader start andend point

Hans_Dwe — Mon, 31 Jul 2023 11:17:57 GMT

Hi @Mohamed_Arshad, no it a 3d objects which have center points

Betreff: Finding Tag'sleader start andend point

Mohamed_Arshad — Mon, 31 Jul 2023 17:44:10 GMT

Hi @Hans_Dwe

If its possible can you please share the sample here so that I will create a workaround in my end

Betreff: Finding Tag'sleader start andend point

Hans_Dwe — Thu, 03 Aug 2023 10:02:20 GMT

Hi @Mohamed_Arshad , my goal is to aligne the start of the leader with it end, i just created a Tag without leader at the beggining then after the move part i just created it, because it was occuring a problem is this possible ?, here just a sample "

ElementMulticategoryFilter multiCatFilter = new ElementMulticategoryFilter(categories);
try
{
FilteredElementCollector linkedCollector = new FilteredElementCollector(linkedDoc, doc.ActiveView.Id)
.WherePasses(multiCatFilter).WhereElementIsNotElementType();

foreach (Element RVT_Links_Elements in linkedCollector)
{
bb = RVT_Links_Elements.get_BoundingBox(doc.ActiveView);

if (bb != null)
{
XYZ centerBounding = (bb.Min + bb.Max) / 2.0;

ref_link = new Reference(RVT_Links_Elements).CreateLinkReference(element);

// Create a new tag
IndependentTag tag = IndependentTag.Create(doc, doc.ActiveView.Id, ref_link, false, tmode, toriant, centerBounding);

// Add the tag to the list of created tags
tags.Add(tag);

}
}
}" and here is the move part "

using (Transaction transMoveTags = new Transaction(doc, "Move Tags to Center of Lines"))
{
transMoveTags.Start();

for (int i = 0; i < tags.Count; i++)
{
IndependentTag tag = tags[i];
XYZ tagCenter = GetTagCenter(tag);

// Find the closest rectangle center to the tag
XYZ nearestRectangleCenter = rectangleCenters
.OrderBy(center => center.DistanceTo(tagCenter))
.FirstOrDefault();

if (nearestRectangleCenter != null)
{
// Move the tag to the nearest rectangle center
ElementTransformUtils.MoveElement(doc, tag.Id, nearestRectangleCenter - tagCenter);

// Remove the used rectangle center from the list
rectangleCenters.Remove(nearestRectangleCenter);
}

tag.HasLeader = true; // make sure the tag has a leader
tag.LeaderEndCondition = LeaderEndCondition.Free; // allow the leader end to be moved freely

}

transMoveTags.Commit();
}"

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michael-coffey — Thu, 03 Aug 2023 18:58:34 GMT

The TagHeadPosition property has a setter. Try setting the property with an XYZ instead of using the move method.

Betreff: Finding Tag'sleader start andend point

Hans_Dwe — Wed, 09 Aug 2023 09:47:05 GMT

Hallo @michael-coffey thanks for the answer, i tried it and worked partially, it worked for the tags that have a horizantal Host element but not for the vertical, i would like to ask if you might know why its not working for vertical cases. i would be very appricated for any suggesstions.

List<Tuple<IndependentTag, Reference>> tagsWithReferences = new List<Tuple<IndependentTag, Reference>>();

// Create a new tag at the center of the longest side of the bounding box
IndependentTag tag = IndependentTag.Create(doc, doc.ActiveView.Id, ref_link, false, tmode, toriant, centerOfLongestSide);
tagsWithReferences.Add(new Tuple<IndependentTag, Reference>(tag, ref_link));
"using (Transaction transStraightenLeader = new Transaction(doc, "Straighten Tag Leaders"))
{
transStraightenLeader.Start();

foreach (var tagWithReference in tagsWithReferences)
{

IndependentTag tag = tagWithReference.Item1;
tag.HasLeader = true;
tag.LeaderEndCondition = LeaderEndCondition.Free;

Reference tagReference = tagWithReference.Item2;

// Get the TagHead position
XYZ tagHeadPosition = tag.TagHeadPosition;

// Get the LeaderEnd position using the reference
XYZ leaderEndPosition = tag.GetLeaderEnd(tagReference);

// Get the bounding box of the host element associated with the tag
Element hostElement = doc.GetElement(tagReference);
BoundingBoxXYZ hostBB = hostElement.get_BoundingBox(doc.ActiveView);

// Check if the bounding box is more vertical or horizontal
double width = bb.Max.X - bb.Min.X;
double height = bb.Max.Y - bb.Min.Y;

// Create a new LeaderEnd point that aligns with the TagHead
XYZ newLeaderEnd;

if (width > height) // If the bounding box is horizontal
{
newLeaderEnd = new XYZ(tagHeadPosition.X, leaderEndPosition.Y, tagHeadPosition.Z);
}
else // If the bounding box is vertical
{
newLeaderEnd = new XYZ(leaderEndPosition.X, tagHeadPosition.Y, tagHeadPosition.Z);
}

// Set the new LeaderEnd to the tag
tag.SetLeaderEnd(tagReference, newLeaderEnd);
}

transStraightenLeader.Commit();
}

"

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Hans_Dwe — Wed, 09 Aug 2023 08:26:01 GMT

Betreff: Finding Tag'sleader start andend point

michael-coffey — Wed, 09 Aug 2023 12:52:10 GMT

Perhaps if you provided a working macro, currently the code is not testable. Also, there shouldn't be a need to create a tuple of a tag with its reference, because the reference can easily be obtained with IndependentTag.GetTaggedReferences method.

Betreff: Finding Tag'sleader start andend point

Hans_Dwe — Fri, 11 Aug 2023 11:49:22 GMT

Hallo Micaheal, i checked the whole Code again, you are right, it was straight forward, i made a mistake. thank you so much for the solution.

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george.potts — Wed, 07 Feb 2024 10:09:05 GMT

Hi did you ever find a way of reliably setting the tag leader start point, so it keeps it as a straight line? Encountered a similar problem.