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C3D-0340 · 17X11: verify the pan - visible footprint, anything crossing the frame edge, layers in view [C3D-CHK] done

Read-only. Re-projects only VISIBLE model space (skipping frozen/off layers) through the current 17X11 view, reports the real content footprint on the sheet, lists entities crossing the viewport frame edge, and censuses which layers are actually in view.

C# payload

// What is the drawing's real footprint now, and what is the thing sticking out to sheet x=27.77?
const double NOTCH_X = 3.0, NOTCH_Y = 8.0;
Log("drawing: " + Db.Filename);
var dict = (DBDictionary)Tx.GetObject(Db.LayoutDictionaryId, OpenMode.ForRead);
foreach (DBDictionaryEntry de in dict) {
    var lay = (Layout)Tx.GetObject(de.Value, OpenMode.ForRead);
    if (lay.LayoutName != "17X11") continue;
    var btr = (BlockTableRecord)Tx.GetObject(lay.BlockTableRecordId, OpenMode.ForRead);
    foreach (ObjectId eid in btr) {
        var vp = Tx.GetObject(eid, OpenMode.ForRead) as Viewport;
        if (vp == null || vp.Number == 1) continue;
        Autodesk.AutoCAD.DatabaseServices.Extents3d fex; 
        try { fex = vp.GeometricExtents; } catch { continue; }
        double FX0=fex.MinPoint.X, FY0=fex.MinPoint.Y;
        double FW=fex.MaxPoint.X-FX0, FH=fex.MaxPoint.Y-FY0;
        double ftpi = vp.ViewHeight/FH, winW = vp.ViewHeight*(FW/FH);
        double MX0 = vp.ViewCenter.X-winW/2, MY0 = vp.ViewCenter.Y-vp.ViewHeight/2;
        Log(string.Format("frame ({0:F2},{1:F2})-({2:F2},{3:F2})  1in={4:F1}ft", FX0,FY0,FX0+FW,FY0+FH, ftpi));

        var ms = (BlockTableRecord)Tx.GetObject(SymbolUtilityServices.GetBlockModelSpaceId(Db), OpenMode.ForRead);
        // everything VISIBLE in the frame window, by layer
        var lay2 = new Dictionary<string,int>();
        double pX0=1e30,pY0=1e30,pX1=-1e30,pY1=-1e30;
        var outside = new List<string>();
        foreach (ObjectId id in ms) {
            var e = Tx.GetObject(id, OpenMode.ForRead) as Autodesk.AutoCAD.DatabaseServices.Entity;
            if (e == null || e.IsErased || !e.Visible) continue;
            // is the layer frozen/off?
            var ltr = (LayerTableRecord)Tx.GetObject(e.LayerId, OpenMode.ForRead);
            if (ltr.IsFrozen || ltr.IsOff) continue;
            Autodesk.AutoCAD.DatabaseServices.Extents3d ex;
            try { ex = e.GeometricExtents; } catch { continue; }
            double ax=ex.MinPoint.X, ay=ex.MinPoint.Y, bx=ex.MaxPoint.X, by=ex.MaxPoint.Y;
            double sx0=FX0+(ax-MX0)/ftpi, sy0=FY0+(ay-MY0)/ftpi;
            double sx1=FX0+(bx-MX0)/ftpi, sy1=FY0+(by-MY0)/ftpi;
            // only things actually visible through the frame
            if (sx1 < FX0 || sx0 > FX0+FW || sy1 < FY0 || sy0 > FY0+FH) continue;
            if (!lay2.ContainsKey(e.Layer)) lay2[e.Layer]=0;
            lay2[e.Layer]++;
            pX0=Math.Min(pX0,sx0); pY0=Math.Min(pY0,sy0); pX1=Math.Max(pX1,sx1); pY1=Math.Max(pY1,sy1);
            if (sx1 > FX0+FW+0.01 || sx0 < FX0-0.01 || sy1 > FY0+FH+0.01 || sy0 < FY0-0.01)
                if (outside.Count < 15)
                    outside.Add(string.Format("   [{0}] {1,-18} ({2,7:F2},{3,7:F2})-({4,7:F2},{5,7:F2}) {6}",
                        e.Handle, e.GetType().Name, sx0,sy0,sx1,sy1, e.Layer));
        }
        Log(string.Format("VISIBLE content footprint: ({0:F2},{1:F2})-({2:F2},{3:F2})", pX0,pY0,pX1,pY1));
        Log("--- entities crossing the frame edge ---");
        foreach (var s in outside) Log(s);
        Log("   (showing up to 15)");
        Log("--- visible layers in view ---");
        foreach (var kv in lay2) Log(string.Format("   {0,-30} x{1}", kv.Key, kv.Value));
    }
}

Result

drawing: C:\Users\sanja\OneDrive\_SurveyDisco\260714 - 285 Huckaby Rd, Brooks, GA 30205, USA\260714 - 285 Huckaby Rd R3.dwg
frame (0.37,0.37)-(16.63,10.63)  1in=200.0ft
VISIBLE content footprint: (-43.05,-28.14)-(31.33,46.24)
--- entities crossing the frame edge ---
   [1A9D7] Circle             ( -43.05, -28.14)-(  31.33,  46.24) SS-FLOW WELL
   (showing up to 15)
--- visible layers in view ---
   SS-FLOW WELL                   x1
   0                              x16
   SS-V-POWER-CL                  x4
   SS-V-ROAD-CNTR                 x2
   SS-V-ROAD-EPVM                 x5
   X-DRIV-CONC                    x5
   SS-V-WALK                      x1
   V-STRC-WALL                    x8
   SS-V-BLDG-OTLN                 x15
   SS-X-FENCE                     x2
   SS-BOUNDARY MAG                x1
   SS-BOUNDARY CYAN               x2
   V-NODE-TEXT                    x2
   SS-BUFFER SETBACK              x10
   C-PROP-LINE                    x7
   C-PROP                         x1
   C-PROP-LINE-TEXT               x9
   C-ANNO                         x13
   SS-BOUNDARY                    x3
   SS-V-POWER-EASEMENT            x14