topic Get point from curve intersection in Revit API Forum

Get point from curve intersection

Tripler123 — Fri, 07 Jan 2022 17:54:48 GMT

Hello, I'm trying to find a point that specifies the intersection of two lines. I have seen that there is a curve.Intersect (curve) that returns a SetComparisonResult. There is a possibility of finding an XYZ of that intersection or how you could do it.

public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements) { UIApplication uiApp = commandData.Application; UIDocument uiDoc = uiApp.ActiveUIDocument; Document doc = uiDoc.Document; // Conduit selection ElementId conduitElementId = uiDoc.Selection.PickObject(Autodesk.Revit.UI.Selection.ObjectType.Element).ElementId; Element conduitElement = doc.GetElement(conduitElementId); // Get curve conduit LocationCurve conduitCurveLocation = conduitElement.Location as LocationCurve; Curve conduitCurve = conduitCurveLocation.Curve; // Get points conduit XYZ startConduitCurvePoint = conduitCurve.GetEndPoint(0); XYZ endConduitCurvePoint = conduitCurve.GetEndPoint(1); // Beam selection ElementId beamElementId = uiDoc.Selection.PickObject(Autodesk.Revit.UI.Selection.ObjectType.Element).ElementId; Element beamElement = doc.GetElement(beamElementId); // Get the beam inferior point y restar la mitad del diametro del elemento double beamInferiorPoint = beamElement.get_BoundingBox(doc.ActiveView).Min.Z - conduitElement.get_Parameter(BuiltInParameter.RBS_CONDUIT_DIAMETER_PARAM).AsDouble() /2; // Get curve beam LocationCurve beamCurveLocation = beamElement.Location as LocationCurve; Curve beamCurve = beamCurveLocation.Curve; // Get points beam XYZ startBeamCurvePoint = beamCurve.GetEndPoint(0); XYZ endBeamCurvePoint = beamCurve.GetEndPoint(1); // Get points Conduit XYZ startConduitPoint = new XYZ(startConduitCurvePoint.X, startConduitCurvePoint.Y, beamInferiorPoint); XYZ endConduitPoint = new XYZ(endConduitCurvePoint.X, endConduitCurvePoint.Y, beamInferiorPoint); // Get points Beam XYZ startBeamPoint = new XYZ(startBeamCurvePoint.X, startBeamCurvePoint.Y, beamInferiorPoint); XYZ endBeamPoint = new XYZ(endBeamCurvePoint.X, endBeamCurvePoint.Y, beamInferiorPoint); // Line to get the point (Z is equal for two Lines) Line conduitLine = Line.CreateBound(startConduitPoint, endConduitPoint); Line beamLine = Line.CreateBound(startBeamCurvePoint, endBeamCurvePoint); // Get the intersection point conduitLine.Intersect(beamLine);// TODO: Get the point return Result.Succeeded; }

Re: Get point from curve intersection

mhannonQ65N2 — Fri, 07 Jan 2022 18:33:37 GMT

Use the overload of Intersect that returns an array of intersection results as an out parameter.

// At top of file: using System.Linq; var intersects = conduitLine.Intersect(beamLine, out var intersections); if(intersects == SetComparisonResult.Disjoint) { // They don't intersect; return Result.Failed; } var intersection = intersections.Cast<IntersectionResult>().First(); var point = intersection.XYZPoint;

Re: Get point from curve intersection

Tripler123 — Fri, 07 Jan 2022 18:43:13 GMT

Thanks, reading the information well I realized and solved it in the following way.

IntersectionResultArray intersectionResults = new IntersectionResultArray(); List<XYZ> points = new List<XYZ>(); SetComparisonResult result = conduitLine.Intersect(beamLine, out intersectionResults); if (result == SetComparisonResult.Overlap) { foreach (IntersectionResult intersectionResult in intersectionResults) { XYZ point = intersectionResult.XYZPoint; points.Add(point); } } TaskDialog.Show("title", points.Count.ToString() + $"{points[0]}");

Re: Get point from curve intersection

leungkahocityu — Thu, 23 Jun 2022 14:36:33 GMT

sir,

can apply to linked element? such as linked wall

Re: Get point from curve intersection

praveen.cMXB2H — Sat, 02 Dec 2023 05:39:11 GMT

How can i find intersection point of wall and column.

@Tripler123