Revised DWG Dim script

Author: gtalarico

0-python-code/Misc_DWGPolylineRedrawAndDimension.py

@@ -0,0 +1,61 @@
+"""
+Linked DWG PolyLine Redraw and Dimension Example
+
+Redraws polylines in a given layer (LAYER_NAME) in a linked DWG instance
+and adds Dimensions to these segments
+
+TESTED REVIT API: 2017
+
+Author: Frederic Beaupere | github.com/hdm-dt-fb
+
+This file is shared on www.revitapidocs.com
+For more information visit http://github.com/gtalarico/revitapidocs
+License: http://github.com/gtalarico/revitapidocs/blob/master/LICENSE.md
+"""
+
+from rpw import revit, db, ui, DB
+
+LAYER_NAME = 'A-FLOR-OTLN'  # "ENTER_DWG_LAYER_NAME_HERE"
+
+selection = ui.Selection().get_elements(wrapped=False)
+dwg_link_instances = [l for l in selection if isinstance(l, DB.ImportInstance)]
+
+if not dwg_link_instances:
+    ui.forms.Alert("please select a linked dwg", exit=True)
+
+active_view = revit.doc.ActiveView
+geo_opt = DB.Options()
+geo_opt.ComputeReferences = True
+geo_opt.IncludeNonVisibleObjects = True
+geo_opt.View = active_view
+
+geometry = dwg_link_instances[0].get_Geometry(geo_opt)
+
+with db.Transaction("redraw dim_help layer dwg polylines"):
+    for geo_inst in geometry:
+        geo_elem = geo_inst.GetInstanceGeometry()
+        for polyline in geo_elem:
+            element = revit.doc.GetElement(polyline.GraphicsStyleId)
+            if not element:
+                continue
+
+            is_target_layer = element.GraphicsStyleCategory.Name == LAYER_NAME
+            is_polyline = polyline.GetType().Name == "PolyLine"
+            if is_polyline and is_target_layer:
+
+                begin = None
+                for pts in polyline.GetCoordinates():
+                    if not begin:
+                        begin = pts
+                        continue
+                    end = pts
+                    line = DB.Line.CreateBound(begin, end)
+                    det_line = doc.Create.NewDetailCurve(active_view, line)
+                    line_refs = DB.ReferenceArray()
+                    geo_curve = det_line.GeometryCurve
+                    line_refs.Append(geo_curve.GetEndPointReference(0))
+                    line_refs.Append(geo_curve.GetEndPointReference(1))
+                    dim = doc.Create.NewDimension(active_view,
+                                                  det_line.GeometryCurve,
+                                                  line_refs)
+                    begin = pts