From 1ee2f420c8e057cdff05f9f4434c7c6980a0d83f Mon Sep 17 00:00:00 2001
From: Dion Moult <dion@thinkmoult.com>
Date: Fri, 18 Jun 2021 14:19:53 +1000
Subject: [PATCH] New feature to see derived global and local elevations

---
 .../bim/module/geometry/__init__.py           |  1 +
 .../blenderbim/bim/module/geometry/ui.py      | 30 +++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/src/blenderbim/blenderbim/bim/module/geometry/__init__.py b/src/blenderbim/blenderbim/bim/module/geometry/__init__.py
index e0b00b7e81..433e308052 100644
--- a/src/blenderbim/blenderbim/bim/module/geometry/__init__.py
+++ b/src/blenderbim/blenderbim/bim/module/geometry/__init__.py
@@ -10,6 +10,7 @@ classes = (
     operator.UpdateParametricRepresentation,
     operator.GetRepresentationIfcParameters,
     prop.BIMGeometryProperties,
+    ui.BIM_PT_derived_placements,
     ui.BIM_PT_representations,
     ui.BIM_PT_mesh,
     ui.BIM_PT_workarounds,
diff --git a/src/blenderbim/blenderbim/bim/module/geometry/ui.py b/src/blenderbim/blenderbim/bim/module/geometry/ui.py
index 5378d33c62..784e2ff739 100644
--- a/src/blenderbim/blenderbim/bim/module/geometry/ui.py
+++ b/src/blenderbim/blenderbim/bim/module/geometry/ui.py
@@ -113,6 +113,36 @@ def BIM_PT_transform(self, context):
         row.operator("bim.edit_object_placement")
 
 
+class BIM_PT_derived_placements(Panel):
+    bl_label = "IFC Derived Placements"
+    bl_idname = "BIM_PT_derived_placements"
+    bl_options = {"DEFAULT_CLOSED"}
+    bl_space_type = "PROPERTIES"
+    bl_region_type = "WINDOW"
+    bl_context = "object"
+    bl_parent_id = "OBJECT_PT_transform"
+
+    def draw(self, context):
+        z = context.active_object.matrix_world.translation.z
+        z_values = [co[2] for co in context.active_object.bound_box]
+        row = self.layout.row(align=True)
+        row.label(text="Min Global Z")
+        row.label(text="{0:.3f}".format(min(z_values) + z))
+        row = self.layout.row(align=True)
+        row.label(text="Max Global Z")
+        row.label(text="{0:.3f}".format(max(z_values) + z))
+
+        collection = bpy.data.objects.get(context.active_object.users_collection[0].name)
+        if collection:
+            collection_z = collection.matrix_world.translation.z
+            row = self.layout.row(align=True)
+            row.label(text="Min Local Z")
+            row.label(text="{0:.3f}".format(min(z_values) + z - collection_z))
+            row = self.layout.row(align=True)
+            row.label(text="Max Local Z")
+            row.label(text="{0:.3f}".format(max(z_values) + z - collection_z))
+
+
 class BIM_PT_workarounds(Panel):
     bl_label = "IFC Vendor Workarounds"
     bl_idname = "BIM_PT_workarounds"