topic Setting Center(Front / Back) work plane for an extrusion in Revit API Forum

Setting Center(Front / Back) work plane for an extrusion

shweta.deshpande — Mon, 08 Feb 2021 15:16:16 GMT

Hello,
I am creating a profile and extrusion.While creating it I am paasing the sketch plane as below :

SketchPlane sketch = FindElement(doc,
typeof(SketchPlane), "Ref. Level")
as SketchPlane;

I want to assign Reference Plane : Center(Front / Back) to the extrusion.
If I pass this reference plane as :

ReferencePlane refpl = null;
FilteredElementCollector collecctor = new FilteredElementCollector(doc).OfClass(typeof(ReferencePlane)).WhereElementIsNotElementType();
foreach (ReferencePlane p in collecctor)
{
if (p.Name == "Center (Front/Back)")
{
refpl = p as ReferencePlane;
break;
}
}

SketchPlane sketch = SketchPlane.Create(doc, refpl.Id);

doc.FamilyCreate.NewExtrusion(true, curveArrArray, sketch, extrusionHeight);

I am getting exception while calling NewExtrusion() method as "One of the conditions for the inputs was not satisfied. Consult the documentation for requirements for each argument."

How can I set Reference Plane : Center(Front / Back) as work plane for the extrusion?

Re: Setting Center(Front / Back) work plane for an extrusion

RPTHOMAS108 — Tue, 09 Feb 2021 00:48:13 GMT

You don't really set the work plane. How is your curve array array formed should be in X-Z plane for centre front back.

Private Function TObj155(ByVal commandData As Autodesk.Revit.UI.ExternalCommandData, ByRef message As String, ByVal elements As Autodesk.Revit.DB.ElementSet) As Result Dim UIDoc As UIDocument = commandData.Application.ActiveUIDocument If UIDoc Is Nothing Then Return Result.Cancelled Else Dim IntDoc As Document = UIDoc.Document Dim TR As XYZ = (XYZ.BasisX + XYZ.BasisZ) * 0.5 Dim TL As XYZ = (-XYZ.BasisX + XYZ.BasisZ) * 0.5 Dim BL As XYZ = (-XYZ.BasisX - XYZ.BasisZ) * 0.5 Dim BR As XYZ = (XYZ.BasisX - XYZ.BasisZ) * 0.5 Dim LN_Top As Line = Line.CreateBound(TR, TL) Dim LN_Left As Line = Line.CreateBound(TL, BL) Dim LN_Btm As Line = Line.CreateBound(BL, BR) Dim LN_Right As Line = Line.CreateBound(BR, TR) Dim Ca As Curve() = New Curve(3) {LN_Top, LN_Left, LN_Btm, LN_Right} Dim CAr As New CurveArray For I = 0 To Ca.Length - 1 CAr.Append(Ca(I)) Next Dim CArAr As New CurveArrArray CArAr.Append(CAr) Dim FEC As New FilteredElementCollector(IntDoc) Dim ECF As New ElementClassFilter(GetType(ReferencePlane)) Dim Els As List(Of Element) = FEC.WherePasses(ECF).ToElements.Where(Function(x) x.Name = "Center (Front/Back)").ToList If Els.Count = 0 Then Return Result.Cancelled End If Using Tx As New Transaction(IntDoc, "Extrude") If Tx.Start = TransactionStatus.Started Then Dim SKP As SketchPlane = SketchPlane.Create(IntDoc, Els(0).Id) IntDoc.FamilyCreate.NewExtrusion(True, CArAr, SKP, 1) Tx.Commit() End If End Using Return Result.Succeeded End Function

Re: Setting Center(Front / Back) work plane for an extrusion

shweta.deshpande — Tue, 09 Feb 2021 05:38:59 GMT

Thanks for the response.

Actually points for the curve are coming in X-Y plane.
Looking at your code, I tried passing Y points to Z coordinate and issue is resolved.
Still not sure whether what I did is correct but now the profile is coming as expected.

Re: Setting Center(Front / Back) work plane for an extrusion

RPTHOMAS108 — Tue, 09 Feb 2021 10:39:42 GMT

You need to go by the view cube: the reference plane 'centre front / back' is in the X-Z plane, 'centre left /right' is in the Y-Z plane, the level ref is X-Y (top / bottom) etc.

If you were sketching the extrusion sketch in the UI which direction would it be in, that is what you have to consider.