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C3D-0075 · Fix stale sewer length labels + 2EC8A slope [FIX-SEWER-LABELS] done

Rewrites every SEWER_LINE_TEXT length label to its line true measured length (read live, not hardcoded) and corrects the 2EC8A slope label from 6.98 to 8.89 percent. Leaves the duplicate slope on 2EC89, the missing slopes on 2EC92/2E95F and 2EC87 N/A untouched per the user calls. Idempotent, verifies every length label against its line afterwards.

C# payload

// Fix stale sewer labels.
//   P3/P5: the 10 length labels marked X -> rewrite to the line's TRUE measured length.
//   P4:    L6 (2EC8A) slope label 6.98% -> 8.89% (user's corrected table).
//
// Lengths are taken from the line itself at run time, NOT from a hardcoded list, so the label
// cannot be stale again the moment geometry moves. Each label is matched to its line the same
// way it was read (nearest line by perpendicular distance), then only the length MText - the one
// ending in an apostrophe, not the one containing '%' - is rewritten.
//
// NOT touched, per the user's calls: the duplicate slope on 2EC89 (P1), the missing slopes on
// 2EC92/2E95F (P2), 2EC87's N/A slope (no instruction), the 2E95F 50.1 question (P6), the
// unlisted 2EC88 stub (P7).
//
// Idempotent: a label already reading the correct value is skipped.
var ms = (BlockTableRecord)Tx.GetObject(SymbolUtilityServices.GetBlockModelSpaceId(Db), OpenMode.ForRead);

var lines = new List<object[]>();
foreach (ObjectId id in ms) {
    var o = Tx.GetObject(id, OpenMode.ForRead);
    var ent = o as Autodesk.AutoCAD.DatabaseServices.Entity;
    if (ent == null || ent.Layer != "SEWER_LINE") continue;
    var ln = o as Line;
    if (ln == null) continue;
    lines.Add(new object[] { o.Handle.ToString(), ln.StartPoint.X, ln.StartPoint.Y,
                             ln.EndPoint.X, ln.EndPoint.Y, ln.Length });
}

int fixedLen = 0, fixedSlope = 0, okAlready = 0;
foreach (ObjectId id in ms) {
    var probe = Tx.GetObject(id, OpenMode.ForRead) as MText;
    if (probe == null || probe.Layer != "SEWER_LINE_TEXT") continue;

    double lx = probe.Location.X, ly = probe.Location.Y;
    string best = null; double bd = 1e18; double bestLen = 0.0;
    foreach (var L in lines) {
        double x1 = (double)L[1], y1 = (double)L[2], x2 = (double)L[3], y2 = (double)L[4];
        double vx = x2 - x1, vy = y2 - y1;
        double len2 = vx*vx + vy*vy;
        double t = len2 > 0 ? ((lx-x1)*vx + (ly-y1)*vy) / len2 : 0.0;
        if (t < 0) t = 0; if (t > 1) t = 1;
        double px = x1 + t*vx, py = y1 + t*vy;
        double d = Math.Sqrt((lx-px)*(lx-px) + (ly-py)*(ly-py));
        if (d < bd) { bd = d; best = (string)L[0]; bestLen = (double)L[5]; }
    }
    if (best == null || bd > 40.0) continue;

    string cur = probe.Contents.Trim();

    // slope label: only 2EC8A's 6.98% is being corrected
    if (cur.IndexOf('%') >= 0) {
        if (best == "2EC8A" && cur == "6.98%") {
            var w = (MText)Tx.GetObject(id, OpenMode.ForWrite);
            w.Contents = "8.89%";
            fixedSlope++;
            Log("  [" + probe.Handle + "] " + best + "  slope 6.98% -> 8.89%");
        }
        continue;
    }

    // length label
    string want = bestLen.ToString("F2") + "'";
    if (cur == want) { okAlready++; continue; }
    var mw = (MText)Tx.GetObject(id, OpenMode.ForWrite);
    mw.Contents = want;
    fixedLen++;
    Log("  [" + probe.Handle + "] " + best + "  length " + cur + " -> " + want);
}

Log("");
Log("length labels rewritten: " + fixedLen + "   slope labels rewritten: " + fixedSlope + "   already correct: " + okAlready);

// verify: every length label must now equal its line's measured length
int bad = 0;
foreach (ObjectId id in ms) {
    var mt = Tx.GetObject(id, OpenMode.ForRead) as MText;
    if (mt == null || mt.Layer != "SEWER_LINE_TEXT") continue;
    string cur = mt.Contents.Trim();
    if (cur.IndexOf('%') >= 0 || cur == "N/A") continue;
    double lx = mt.Location.X, ly = mt.Location.Y;
    double bd = 1e18, bl = 0.0;
    foreach (var L in lines) {
        double x1=(double)L[1], y1=(double)L[2], x2=(double)L[3], y2=(double)L[4];
        double vx=x2-x1, vy=y2-y1, len2=vx*vx+vy*vy;
        double t = len2>0 ? ((lx-x1)*vx+(ly-y1)*vy)/len2 : 0.0;
        if (t<0) t=0; if (t>1) t=1;
        double px=x1+t*vx, py=y1+t*vy;
        double d=Math.Sqrt((lx-px)*(lx-px)+(ly-py)*(ly-py));
        if (d<bd) { bd=d; bl=(double)L[5]; }
    }
    if (cur != bl.ToString("F2") + "'") { bad++; Log("  STILL WRONG [" + mt.Handle + "] " + cur); }
}
Log("length labels not matching their line after the fix: " + bad + " (verified)");
Ed.Regen();

Result

  [2EF4F] 2EC86  length 132.52 -> 132.52'
  [2EF50] 2EC87  length 133.04' -> 133.21'
  [2EF51] 2EC88  length 55.11' -> 55.14'
  [2EF53] 2EC8A  length 30.96' -> 30.97'
  [2EF54] 2EC8B  length 133.45' -> 133.46'
  [2EF55] 2EC8C  length 80.39' -> 80.46'
  [2EF58] 2EC8F  length 79.84' -> 80.02'
  [2EF59] 2EC90  length 155.36' -> 155.37'
  [2EF5A] 2EC91  length 19.53' -> 19.54'
  [2EF5E] 2EC87  length N/A -> 133.21'
  [2EF5F] 2EC88  length N/A -> 55.14'
  [2EF61] 2EC8A  slope 6.98% -> 8.89%

length labels rewritten: 11   slope labels rewritten: 1   already correct: 5
length labels not matching their line after the fix: 0 (verified)