This is some code that when ran in AutoCAD MEP will insert 3 straight cable tray fittings, an elbow, and three more straight fittings. There is plenty on the internet to select a polyline and traverse.
I threw this code together super fast and there is no error checking. Ran and tested in AutoCAD MEP 2021.
First the command method to run the code.
[CommandMethod("KabMepExamples", "KabCableTrayAdd", CommandFlags.Modal)]
public void CableTrayAddExampleCommand()
{
ElectricCableTray.CableTrayAdd(new Point3d(0, 0, 0), new Point3d(60, 0, 0));
ElectricCableTray.CableTrayAdd(new Point3d(60, 0, 0), new Point3d(120, 0, 0));
ElectricCableTray.CableTrayAdd(new Point3d(120, 0, 0), new Point3d(180, 0, 0));
ElectricCableTray.CableTrayFittingAdd(new Point3d(180.0, -18, 0));
ElectricCableTray.CableTrayAdd(new Point3d(198, -18, 0), new Point3d(198, -78, 0));
ElectricCableTray.CableTrayAdd(new Point3d(198, -78, 0), new Point3d(198, -138, 0));
ElectricCableTray.CableTrayAdd(new Point3d(198, -138, 0), new Point3d(198, -208, 0));
}
And then the main class that adds the cable tray and the fitting.
namespace Kab.Mep.Examples
{
using System;
using Autodesk.Aec.Building.ApplicationServices;
using Autodesk.Aec.Building.DatabaseServices;
using Autodesk.Aec.Building.Elec.DatabaseServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Geometry;
using Kab.Acad.Core;
internal static class ElectricCableTray
{
internal static ObjectId CableTrayFittingAdd(Point3d centerPoint)
{
using (Transaction transaction = Active.Database.TransactionManager.StartTransaction())
{
CableTrayFitting cableTrayFitting = new CableTrayFitting();
cableTrayFitting.SetToStandard(Active.Database);
cableTrayFitting.SetDatabaseDefaults(Active.Database);
DataQuery dataQuery = new DataQuery();
dataQuery.Domain = Domain.CableTrayComponent;
dataQuery.PartGuid = "548C6AF7-E846-42AB-AA6C-34ABD407A6DC";
dataQuery.AddSizeParameter(Context.CatalogPartSizeName, 0, "12x6 inch 90 degree Cable Tray 12 Inch Radius Elbow Trough US Imperial");
DataExpandedTable dataExpandedTable = PartManager.GetPartTable(dataQuery, 10);
DataRecordCollection dataRecordCollection = dataExpandedTable.DataRecords;
if (dataRecordCollection.Count > 0)
{
DataRecord dataRecord = dataRecordCollection[0];
PartManager.CreatePartViaRecord(dataExpandedTable, dataRecord, cableTrayFitting);
}
else
{
transaction.Abort();
Active.WriteMessage($"\nCable Tray Fitting {dataQuery.PartGuid} is not found in the part catalog.");
return ObjectId.Null;
}
cableTrayFitting.Rotation = Math.PI / -2;
cableTrayFitting.Location = centerPoint;
cableTrayFitting.Normal = Vector3d.ZAxis;
cableTrayFitting.SetDefaultLayer();
BlockTable blockTable = transaction.GetObject(Active.Database.BlockTableId, OpenMode.ForRead) as BlockTable;
BlockTableRecord blockTableRecord = (BlockTableRecord)transaction.GetObject(blockTable[BlockTableRecord.ModelSpace], OpenMode.ForWrite);
blockTableRecord.AppendEntity(cableTrayFitting);
transaction.AddNewlyCreatedDBObject(cableTrayFitting, true);
transaction.Commit();
return cableTrayFitting.ObjectId;
}
}
internal static ObjectId CableTrayAdd(Point3d startPoint, Point3d endPoint)
{
using (Transaction transaction = Active.Database.TransactionManager.StartTransaction())
{
CableTray cableTray = new CableTray();
cableTray.SetToStandard(Active.Database);
cableTray.SetDatabaseDefaults(Active.Database);
DataQuery dataQuery = new DataQuery();
dataQuery.Domain = Domain.CableTrayComponent;
dataQuery.PartGuid = "60250FB7-3B15-11D5-8F1F-0010B5481882";
dataQuery.AddSizeParameter(Context.CatalogPartSizeName, 0, "12x6 inch Cable Trays Trough US Imperial");
DataExpandedTable dataExpandedTable = PartManager.GetPartTable(dataQuery, 10);
DataRecordCollection dataRecordCollection = dataExpandedTable.DataRecords;
if (dataRecordCollection.Count > 0)
{
DataRecord dataRecord = dataRecordCollection[0];
PartManager.CreatePartViaRecord(dataExpandedTable, dataRecord, cableTray);
}
else
{
transaction.Abort();
Active.WriteMessage($"\nCable Tray {dataQuery.PartGuid} is not found in the part catalog.");
return ObjectId.Null;
}
cableTray.SetBaseCurve(new LineSegment3d(startPoint, endPoint), Vector3d.ZAxis);
cableTray.SetDefaultLayer();
BlockTable blockTable = transaction.GetObject(Active.Database.BlockTableId, OpenMode.ForRead) as BlockTable;
BlockTableRecord blockTableRecord = (BlockTableRecord)transaction.GetObject(blockTable[BlockTableRecord.ModelSpace], OpenMode.ForWrite);
blockTableRecord.AppendEntity(cableTray);
transaction.AddNewlyCreatedDBObject(cableTray, true);
transaction.Commit();
return cableTray.ObjectId;
}
}
}
}
Finally a small video showing the command being ran.
I left the traversal of the polyline up to you. If i have time tomorrow I will write some code that gets the routing preference and uses the cable tray and the cable tray elbow from the preference instead of hard coding it.
