/// <summary>
/// 获取线管的直径。
/// </summary>
/// <param name="cd"> 线管对象 </param>
/// <returns>线管的直径，单位为 inch </returns>
public double?GetConduitDiameter()
{
Parameter pa = ConduitIns.get_Parameter(BuiltInParameter.RBS_CONDUIT_DIAMETER_PARAM);
if (pa != null)
{
return(pa.AsDouble());
}
return(null);
}
/// <summary>
/// Given a curve element, determine three parallel
/// curves on the right, left and above, offset by
/// a given radius or half diameter.
/// </summary>
void CreateConduitOffsets(
Element conduit,
double diameter,
double distance)
{
Document doc = conduit.Document;
// Given element location curve
var obj = conduit.Location as LocationCurve;
XYZ start = obj.Curve.GetEndPoint(0);
XYZ end = obj.Curve.GetEndPoint(1);
XYZ vx = end - start;
// Offsets
double radius = 0.5 * diameter;
double offset_lr = radius;
double offset_up = radius * Math.Sqrt(3);
// Assume vx is horizontal to start with
XYZ vz = XYZ.BasisZ;
XYZ vy = vz.CrossProduct(vx);
XYZ start1 = start + offset_lr * vy;
XYZ start2 = start - offset_lr * vy;
XYZ start3 = start + offset_up * vz;
XYZ end1 = start1 + vx;
XYZ end2 = start2 + vx;
XYZ end3 = start3 + vx;
// Confusing sample code from
// https://forums.autodesk.com/t5/revit-api-forum/offset-conduit-only-by-z-axis/m-p/9972671
var L = Math.Sqrt((start.X - end.X) * (start.X - end.X) + (start.Y - end.Y) * (start.Y - end.Y));
double x1startO = start.X + distance * (end.Y - start.Y) / L;
double x1endO = end.X + distance * (end.Y - start.Y) / L;
double y1startO = start.Y + distance * (start.X - end.X) / L;
double y1end0 = end.Y + distance * (start.X - end.X) / L;
Conduit conduit1 = Conduit.Create(doc, conduit.GetTypeId(), new XYZ(x1startO, y1startO, start.Z), new XYZ(x1endO, y1end0, end.Z), conduit.LevelId);
conduit1.get_Parameter(BuiltInParameter.RBS_CONDUIT_DIAMETER_PARAM).Set(diameter);
double x2startO = start.X - distance * (end.Y - start.Y) / L;
double x2endO = end.X - distance * (end.Y - start.Y) / L;
double y2startO = start.Y - distance * (start.X - end.X) / L;
double y2end0 = end.Y - distance * (start.X - end.X) / L;
Conduit conduit2 = Conduit.Create(doc, conduit.GetTypeId(), new XYZ(x2startO, y2startO, start.Z), new XYZ(x2endO, y2end0, end.Z), conduit.LevelId);
conduit2.get_Parameter(BuiltInParameter.RBS_CONDUIT_DIAMETER_PARAM).Set(diameter);
XYZ p0 = new XYZ(start.X - (end.Y - start.Y) * (1 / obj.Curve.ApproximateLength), start.Y + (end.X - start.X) * (1 / obj.Curve.ApproximateLength), start.Z);
XYZ p1 = new XYZ(start.X + (end.Y - start.Y) * (1 / obj.Curve.ApproximateLength), start.Y - (end.X - start.X) * (1 / obj.Curve.ApproximateLength), start.Z);
Conduit conduit3;
Curve copyCurve = obj.Curve.CreateOffset(-diameter * Math.Sqrt(3) / 2, Line.CreateBound(p0, p1).Direction);
conduit3 = Conduit.Create(doc, conduit.GetTypeId(), copyCurve.GetEndPoint(0), copyCurve.GetEndPoint(1), conduit.LevelId);
conduit3.get_Parameter(BuiltInParameter.RBS_CONDUIT_DIAMETER_PARAM).Set(diameter);
}
