Merge pull request #15 from AlvaroCarnicero/dev_AlvaroCarnicero

Add script to create text entities at the center of polylines in AutoCAD

Script Examples/ironpython3.4/collectPolylinesAndWriteTextInCenter.py

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+# Many thanks to Chuong Ho for this awesome repository
+# Many thanks Cyril-Pop for the starting point in this script.
+
+import clr
+clr.AddReference('acmgd')
+clr.AddReference('acdbmgd')
+clr.AddReference('accoremgd')
+
+# Import references from AutoCAD
+from Autodesk.AutoCAD.Runtime import *
+from Autodesk.AutoCAD.ApplicationServices import *
+from Autodesk.AutoCAD.EditorInput import *
+from Autodesk.AutoCAD.DatabaseServices import *
+from Autodesk.AutoCAD.Geometry import *
+
+# Global AutoCAD variables
+doc = Application.DocumentManager.MdiActiveDocument
+ed = doc.Editor
+db = doc.Database
+
+# Layer names
+polyline_layer_name = "Aux-REVISION"
+text_layer_name = "I-WALL"
+
+def polyline_center(polyline):
+    """
+    Calculates the approximate geometric center of a polyline.
+    """
+    extents = polyline.GeometricExtents
+    center = Point3d(
+        (extents.MinPoint.X + extents.MaxPoint.X) / 2,
+        (extents.MinPoint.Y + extents.MaxPoint.Y) / 2,
+        (extents.MinPoint.Z + extents.MaxPoint.Z) / 2
+    )
+    return center
+
+def create_text(btr, trans, position, text_value, text_layer):
+    """
+    Creates a text entity in AutoCAD and adds it to the model space.
+    """
+    text = DBText()
+    text.Position = position
+    text.Height = 3  # Text height
+    text.TextString = text_value  # Text content
+    text.Layer = text_layer  # Assign the text to the specified layer
+    btr.AppendEntity(text)
+    trans.AddNewlyCreatedDBObject(text, True)
+    return text
+
+def main():
+    output = []  # List to store created texts
+    errors = []  # List to record errors
+
+    with doc.LockDocument():  # Lock the document
+        with db.TransactionManager.StartTransaction() as t:
+            # Access the model space
+            bt = t.GetObject(db.BlockTableId, OpenMode.ForRead)
+            btr = t.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite)
+
+            # Iterate through the entities in model space
+            for objectid in btr:
+                blkRef = t.GetObject(objectid, OpenMode.ForRead)
+                if isinstance(blkRef, Polyline) and blkRef.Layer == polyline_layer_name:
+                    try:
+                        # Get the geometric center of the polyline
+                        center = polyline_center(blkRef)
+
+                        # Create a unique text entity at the center of the polyline
+                        text = create_text(btr, t, center, f"Text-{len(output) + 1}", text_layer_name)
+                        output.append(text)
+                    except Exception as e:
+                        errors.append((blkRef, str(e)))
+                        ed.WriteMessage(f"\nError processing polyline: {e}")
+                else:
+                    errors.append(blkRef)
+
+            # Commit the transaction
+            t.Commit()
+
+    # Results
+    ed.WriteMessage(f"\n{len(output)} texts were created.")
+    if errors:
+        ed.WriteMessage(f"\nErrors found: {len(errors)}")
+
+if __name__ == "__main__":
+    main()