How to find start/end of ramp in revit, perhaps with sketches?

Question

I have a bunch of ramps that I would like to know the begin and end points of (and in case of multiple begin/end points I would like to know how they connect). I currently get these as

List<TransitionPoint> ret = new List<TransitionPoint>(); FilteredElementCollector collector = new FilteredElementCollector(doc); ICollection<Element> ramps = collector.OfCategory(BuiltInCategory.OST_Ramps).ToElements();  foreach (var ramp in ramps) {    //what goes here? } 

These ramps contain the following properties:

Type Comments Ramp Max Slope (1/x) Category URL Design Option Type Name Ramp Material Function Manufacturer Family Name Model Keynote Type Image Text Size Shape Text Font Maximum Incline Length Assembly Description Assembly Code Type Mark Category Thickness Cost Description 

Now if these where stairs I would use ICollection stairs = collector.OfCategory(BuiltInCategory.OST_Stairs).OfClass(typeof(Stairs)).ToElements(); and then I can cast the objects into Stairs however there does not appear to be a class simmulair to Stairs which would allow me to adres Stairs.GetStairsRuns().

Anybody know how to either get something like a RampRun or otherwise find the start and end of a ramp?

I have also tried the following sollution but that didn't work either

public static void MapRunsToRamps(Document doc) {    var rule = ParameterFilterRuleFactory.CreateNotEqualsRule(new ElementId(BuiltInParameter.HOST_ID_PARAM), "null", true);     ElementParameterFilter filter = new ElementParameterFilter(rule);    FilteredElementCollector collector = new FilteredElementCollector(doc);    List<Element> rampsRuns = collector.WherePasses(filter).ToElements().ToList<Element>();    foreach (Element e in rampsRuns)    {       var hostpara = e.get_Parameter(BuiltInParameter.HOST_ID_PARAM);       if (hostpara != null)       {          var host = doc.GetElement(new ElementId(hostpara.AsInteger()));          if (host.Category.Equals(BuiltInCategory.OST_Ramps))          {             //breakpoint that is never activated           }       }    } } 

This finds plenty of objects just none with a ramp as a host.

Here is an example of a ramp and the location I'm trying to find marked with red arrows.

this https://forums.autodesk.com/t5/revit-api/how-do-we-get-the-x-y-z-cordinates-for-stairs-ramps/td-p/2575349 suggests that we can use a locationcurve, any way to do that?

edit: There do appear to be sketches based on which we might be able to find the ramps, question is if I have a sketch say with

    var rampCategoryfilter = new ElementCategoryFilter(BuiltInCategory.OST_StairsSketchRunLines);     var rampsRuns = new FilteredElementCollector(doc).WherePasses(rampCategoryfilter); 

then I can indeed get the locations but what I do not have is the ramp that this belongs too, any idea how to find that?

Answer 1

Assuming that your Ramp is a FamilyInstance :

var fecRamps = new FilteredElementCollector(doc)     .OfClass(typeof(FamilyInstance))     .Where(pElt =>     {         int lCatId = pElt.Category.Id.IntegerValue;         return lCatId == (int)BuiltInCategory.OST_Ramps;     })     .OfType<FamilyInstance>()     .ToList();  List<XYZ> lRampLocs = new List<XYZ>(); foreach (var pFam in fecRamps) {     var fLoc = pFam.Location as LocationCurve;     var fRampSide1 = new XYZ(fLoc.Curve.GetEndPoint(0);     var fRampSide2 = new XYZ(fLoc.Curve.GetEndPoint(1);      lRampLocs.Add(fRampSide1);     lRampLocs.Add(fRampSide2); } 

Every FamilyInstance has a Location and you can cast the Location as a LocationCurve. From the curve, you can get the end points via the Autodesk.Revit.DB namespace.