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C3D-0116 · Linework: TBC road A left [LW-TBC-A-left] done

TBC road A left as 1 polyline(s) on SS-V-ROAD-CURB, max 12 vertices, split at gaps over 45 ft, zero crossings verified against all other runs before posting. Points: 256,255,259,262

C# payload

// TBC road A left -> SS-V-ROAD-CURB
//
// survey-linework recipe. Points read from the drawing (C3D-0111), chained nearest-neighbour,
// then: split at any gap over 45 ft (the road is ~26 ft wide with shots every 5-40 ft, so a
// longer hop is a hole in the survey, not curb), capped at 12 vertices per polyline, and
// verified to have ZERO crossings against every other run before posting.
//
// Regular Polyline, never Polyline3d.
const string LAYER = "SS-V-ROAD-CURB";
var ms = (BlockTableRecord)Tx.GetObject(SymbolUtilityServices.GetBlockModelSpaceId(Db), OpenMode.ForWrite);
EnsureLayer(LAYER, 7);

    {
        var pl = new Polyline();
        pl.AddVertexAt(0, new Point2d(2238189.4780, 1325229.1720), 0, 0, 0);
        pl.AddVertexAt(1, new Point2d(2238193.9930, 1325240.9330), 0, 0, 0);
        pl.AddVertexAt(2, new Point2d(2238207.5960, 1325275.4690), 0, 0, 0);
        pl.AddVertexAt(3, new Point2d(2238220.5470, 1325308.5720), 0, 0, 0);
        pl.Layer = LAYER;
        ms.AppendEntity(pl); Tx.AddNewlyCreatedDBObject(pl, true);
        Log(String.Format("  polyline {0} verts, {1:F2} ft  pts 256,255,259,262", pl.NumberOfVertices, pl.Length));
    }

int n = 0;
foreach (ObjectId id in ms) {
    var e = Tx.GetObject(id, OpenMode.ForRead) as Autodesk.AutoCAD.DatabaseServices.Entity;
    if (e != null && e.Layer == LAYER && e is Polyline) n++;
}
Log("SS-V-ROAD-CURB now holds " + n + " polyline(s) (verified)");
Ed.Regen();

Result

  polyline 4 verts, 85.26 ft  pts 256,255,259,262
SS-V-ROAD-CURB now holds 1 polyline(s) (verified)