Hello,
I recently wrote an ExternalCommand to generate swept solid based on the location curve of a selected element. However, when a curved wall is selected, there is a exception reads:"The Curve Loop does not lie in the plane orthogonal to the projPlaneNorm". I don't know how to solve the problem and hope to get support from the community. Thank you so much!
Here is my code
[Transaction(TransactionMode.Manual)]
[Regeneration(RegenerationOption.Manual)]
public class GenerateSweptGeometryBasedOnLocationCurve : IExternalCommand
{
public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
{
Document doc = commandData.Application.ActiveUIDocument.Document;
Autodesk.Revit.UI.Selection.Selection sel = commandData.Application.ActiveUIDocument.Selection;
Reference reference = sel.PickObject(Autodesk.Revit.UI.Selection.ObjectType.Element);
Transaction trans = new Transaction(doc);
Element elem = doc.GetElement(reference);
trans.Start("Create solid");
LocationCurve lc = elem.Location as LocationCurve;
if (lc != null)
{
//Create the sweep path
var pathCurveLoop = new CurveLoop();
pathCurveLoop.Append(lc.Curve);
Curve firstCurve = pathCurveLoop.ElementAt(0);
//get the point to create a plane for the profile.
XYZ xyzFirstPoint = firstCurve.GetEndPoint(0);
//Create the plane
Transform transform = firstCurve.ComputeDerivatives(0, true);
XYZ xyzDirection = transform.BasisX;
Plane profilePlane = Plane.CreateByNormalAndOrigin(xyzDirection.Normalize(), transform.Origin);
//Create a profile which is a rectangle with height and width of 2000mm and 900mm
double dblHeight = 2000 / 304.8;
double dblWidth = 900 / 304.8;
UV uvPt0 = new UV(0, 0) - new UV(dblWidth / 2, 0);
UV uvPt1 = uvPt0 + new UV(dblWidth, 0);
UV uvPt2 = uvPt1 + new UV(0, dblHeight);
UV uvPt3 = uvPt2 - new UV(dblWidth, 0);
XYZ xVec = profilePlane.XVec;
XYZ yVec = profilePlane.YVec;
XYZ xyzPt0 = profilePlane.Origin + profilePlane.XVec.Multiply(uvPt0.U) + profilePlane.YVec.Multiply(uvPt0.V);
XYZ xyzPt1 = profilePlane.Origin + profilePlane.XVec.Multiply(uvPt1.U) + profilePlane.YVec.Multiply(uvPt1.V);
XYZ xyzPt2 = profilePlane.Origin + profilePlane.XVec.Multiply(uvPt2.U) + profilePlane.YVec.Multiply(uvPt2.V);
XYZ xyzPt3 = profilePlane.Origin + profilePlane.XVec.Multiply(uvPt3.U) + profilePlane.YVec.Multiply(uvPt3.V);
Line l1 = Line.CreateBound(xyzPt0, xyzPt1);
Line l2 = Line.CreateBound(xyzPt1, xyzPt2);
Line l3 = Line.CreateBound(xyzPt2, xyzPt3);
Line l4 = Line.CreateBound(xyzPt3, xyzPt0);
CurveLoop loop = new CurveLoop();
loop.Append(l1);
loop.Append(l2);
loop.Append(l3);
loop.Append(l4);
List<CurveLoop> newloops = new List<CurveLoop>() { loop };
//Create the swept solid
Solid sweepSolid= GeometryCreationUtilities.CreateSweptGeometry(pathCurveLoop, 0, 0, newloops);
//Create a directShape to visualize the solid
DirectShape ds = DirectShape.CreateElement(doc, new ElementId(BuiltInCategory.OST_GenericModel));
ds.AppendShape(new Solid[1] { sweepSolid });
trans.Commit();
return Result.Succeeded;
}
else
{
throw new InvalidOperationException("Current element is not a curve-dirven element");
}
}
}
