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C3D-SEGLABELS · Add distance+grade labels on 6 sewer segments done

Plan-view DBText per segment ('159 12.4%' style) at midpoint, rotated along pipe, 10ft offset, SEWER_LINE_TEXT, height matched to MH labels. Final worksheet values. Pipe types left for user.

C# payload

// Add distance + grade labels on each sewer segment in PLAN view (format like the design eg: "159' 12.4%").
// - one DBText per segment at the midpoint, rotated along the pipe (kept upright), offset 10' perpendicular
// - layer SEWER_LINE_TEXT (HCWA: sewer line text layer), height/style cloned from the manhole labels
// - values from the FINAL worksheet (Rim F3, corrected inverts, A-1 rim 687.07)
// Pipe types not included (unknown) — user adds those. Idempotent: skips labels already present.
using System;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Geometry;

// segment: from(x,y), to(x,y), label
var segs = new (double x1, double y1, double x2, double y2, string label)[]
{
    (2296827.2974, 1280096.1071, 2296878.6992, 1280034.2288, "80' 15.8%"),   // 7007 A6 -> 7008 A5
    (2296878.6992, 1280034.2288, 2296980.3753, 1279912.0813, "159' 12.4%"),  // 7008 A5 -> 7009 A4
    (2296980.3753, 1279912.0813, 2297249.9378, 1279675.2908, "359' 1.1%"),   // 7009 A4 -> 7010 A3
    (2297249.9378, 1279675.2908, 2297269.0965, 1279597.6123, "80' 0.6%"),    // 7010 A3 -> 7011 A2
    (2297269.0965, 1279597.6123, 2297423.0090, 1279618.6604, "155' 0.7%"),   // 7011 A2 -> 7012 A1
    (2297423.0090, 1279618.6604, 2297424.7637, 1279599.2288, "20' 0.8%"),    // 7012 A1 -> 7013
};

EnsureLayer("SEWER_LINE_TEXT", 7);

// clone height/style from an existing manhole label (handle 9D = "R 724.74")
var tmplId = Db.GetObjectId(false, new Handle(Convert.ToInt64("9D", 16)), 0);
var tmpl = (DBText)Tx.GetObject(tmplId, OpenMode.ForRead);

// existing labels on the layer (idempotency)
var existing = new System.Collections.Generic.HashSet<string>(StringComparer.OrdinalIgnoreCase);
foreach (ObjectId id in ModelSpace)
{
    var e = Tx.GetObject(id, OpenMode.ForRead);
    if (e is DBText t && string.Equals(t.Layer, "SEWER_LINE_TEXT", StringComparison.OrdinalIgnoreCase))
        existing.Add(t.TextString);
}

int added = 0;
foreach (var s in segs)
{
    if (existing.Contains(s.label)) { Log($"  skip '{s.label}' (already present)"); continue; }

    double mx = (s.x1 + s.x2) / 2.0, my = (s.y1 + s.y2) / 2.0;
    double ang = Math.Atan2(s.y2 - s.y1, s.x2 - s.x1);
    if (ang > Math.PI / 2 || ang < -Math.PI / 2) ang += Math.PI;   // keep text upright

    // offset 10' perpendicular (to the upper-left of the reading direction)
    double ox = -Math.Sin(ang) * 10.0, oy = Math.Cos(ang) * 10.0;

    var txt = new DBText();
    txt.SetDatabaseDefaults();
    txt.TextString = s.label;
    txt.Position = new Point3d(mx + ox, my + oy, 0);
    txt.Height = tmpl.Height;
    txt.TextStyleId = tmpl.TextStyleId;
    txt.Rotation = ang;
    txt.Layer = "SEWER_LINE_TEXT";
    ModelSpace.AppendEntity(txt);
    Tx.AddNewlyCreatedDBObject(txt, true);
    Log($"  + '{s.label}' at ({mx + ox:0.0},{my + oy:0.0}) rot={ang * 180 / Math.PI:0.0}deg");
    added++;
}
Log($"DONE. {added} segment labels added on SEWER_LINE_TEXT (height {tmpl.Height:0.00}, matched to MH text). Positions are draft — nudge as needed.");

Result

  + '80' 15.8%' at (2296860.7,1280071.6) rot=-50.3deg
  + '159' 12.4%' at (2296937.2,1279979.6) rot=-50.2deg
  + '359' 1.1%' at (2297121.8,1279801.2) rot=-41.3deg
  + '80' 0.6%' at (2297269.2,1279638.8) rot=-76.1deg
  + '155' 0.7%' at (2297344.7,1279618.0) rot=7.8deg
  + '20' 0.8%' at (2297433.8,1279609.8) rot=-84.8deg
DONE. 6 segment labels added on SEWER_LINE_TEXT (height 5.50, matched to MH text). Positions are draft — nudge as needed.