topic Re: Modifying a Cylinder using Inventor API C# in Inventor Programming Forum

Modifying a Cylinder using Inventor API C#

lokit.khemka — Mon, 05 Jun 2023 04:42:15 GMT

I have the following code for obtaining the cylindrical faces in the open geometry. I want to modify the radius of the cylinder. How should I proceed with this?

public static void HoleList(Inventor.Application mApplication) { PartDocument doc = (PartDocument)mApplication.ActiveDocument; PartComponentDefinition PartCompDef = doc.ComponentDefinition; SurfaceBody body = PartCompDef.SurfaceBodies[1]; int holeCount = 0; int count = body.Faces.Count; foreach (Face face in body.Faces) { if (face.SurfaceType == SurfaceTypeEnum.kCylinderSurface) { holeCount++; Cylinder cylinder = (Cylinder)face.Geometry; double ddepth = 0.0; if (cylinder.AxisVector.Z == 1 || cylinder.AxisVector.Z == -1) { ddepth = System.Math.Abs(System.Math.Abs(face.Vertices[1].Point.Z) - System.Math.Abs(face.Vertices[2].Point.Z)) * 10; } else if (cylinder.AxisVector.Y == 1) { ddepth = System.Math.Abs(System.Math.Abs(face.Vertices[1].Point.Y) - System.Math.Abs(face.Vertices[2].Point.Y)) * 10; } else if (cylinder.AxisVector.X == 1) { ddepth = System.Math.Abs(System.Math.Abs(face.Vertices[1].Point.X) - System.Math.Abs(face.Vertices[2].Point.X)) * 10; } double diameter = 2 * cylinder.Radius; Console.WriteLine("Diameter: " + cylinder.Radius * 2 * 10 + " mm" + "\t" + "Depth: " + ddepth + " mm"); foreach(Edge edge in face.Edges) { Console.WriteLine(edge.StartVertex.Point.X + " " + edge.StartVertex.Point.Y + " " + edge.StartVertex.Point.Z); Console.WriteLine(edge.StopVertex.Point.X + " " + edge.StopVertex.Point.Y + " " + edge.StopVertex.Point.Z); } } } } }

Any help will be greatly appreciated. Thank you.

Re: Modifying a Cylinder using Inventor API C#

Michael.Navara — Mon, 05 Jun 2023 06:19:28 GMT

You can't modify surface body directly in this way, but you can use ThickenFeature for this.

Re: Modifying a Cylinder using Inventor API C#

lokit.khemka — Tue, 06 Jun 2023 05:48:25 GMT

Hi. Can you provide a simple code example for this? I am new to this and I am unable to get ThickenFeature to work with the code.

Re: Modifying a Cylinder using Inventor API C#

Michael.Navara — Tue, 06 Jun 2023 06:29:19 GMT

This is simple iLogic sample how to create ThicknessFeature from all cylindrical faces

Sub Main() Dim part As PartDocument = ThisDoc.Document Dim partDef As PartComponentDefinition = part.ComponentDefinition 'Iterate all faces in first surface body For Each face As Face In partDef.SurfaceBodies(1).Faces 'Check if face is cylindrical face Dim cylinder As Cylinder = TryCast(face.Geometry, Cylinder) If cylinder Is Nothing Then Continue For 'Get radius for future use. Not used yet Dim radius As Double = cylinder.Radius 'Build face collection for each face Dim faceCollection As FaceCollection = ThisApplication.TransientObjects.CreateFaceCollection() faceCollection.Add(face) 'Set offset/thickness distance. It can depend on current radius Dim distance As Double = 0.1 ' 1 mm 'Create thickness feature Dim thicknessFeature = partDef.Features.ThickenFeatures.Add( faceCollection, distance, PartFeatureExtentDirectionEnum.kPositiveExtentDirection, PartFeatureOperationEnum.kJoinOperation, False) Next End Sub