Different drawings can now have different aspect ratios. Finally!

src/ifcblenderexport/blenderbim/bim/__init__.py

@@ -341,6 +341,7 @@ if bpy is not None:
         bpy.types.VIEW3D_MT_mesh_add.append(model_window.add_object_button)
         bpy.types.VIEW3D_MT_mesh_add.append(model_slab.add_object_button)
         bpy.types.VIEW3D_MT_mesh_add.append(model_opening.add_object_button)
+        bpy.app.handlers.depsgraph_update_pre.append(operator.depsgraph_update_pre_handler)
 
     def unregister():
         for cls in reversed(classes):
@@ -367,3 +368,4 @@ if bpy is not None:
         bpy.types.VIEW3D_MT_mesh_add.remove(model_window.add_object_button)
         bpy.types.VIEW3D_MT_mesh_add.remove(model_slab.add_object_button)
         bpy.types.VIEW3D_MT_mesh_add.remove(model_opening.add_object_button)
+        bpy.app.handlers.depsgraph_update_pre.remove(operator.depsgraph_update_pre_handler)

src/ifcblenderexport/blenderbim/bim/operator.py

@@ -25,6 +25,7 @@ from itertools import cycle
 from mathutils import Vector, Matrix, Euler
 from math import radians, atan, tan, cos, sin, atan2
 from pathlib import Path
+from bpy.app.handlers import persistent
 
 colour_list = [
     (.651, .81, .892, 1),
@@ -40,6 +41,22 @@ colour_list = [
     (.993, .999, .6, 1),
     (.693, .349, .157, 1)]
 
+
+@persistent
+def depsgraph_update_pre_handler(scene):
+    set_active_camera_resolution(scene)
+
+
+def set_active_camera_resolution(scene):
+    if not scene.camera \
+            or '/' not in scene.camera.name:
+        return
+    if scene.render.resolution_x != scene.camera.data.BIMCameraProperties.raster_x \
+            or scene.render.resolution_y != scene.camera.data.BIMCameraProperties.raster_y:
+        scene.render.resolution_x = scene.camera.data.BIMCameraProperties.raster_x
+        scene.render.resolution_y = scene.camera.data.BIMCameraProperties.raster_y
+
+
 class ExportIFC(bpy.types.Operator):
     bl_idname = "export_ifc.bim"
     bl_label = "Export IFC"

src/ifcblenderexport/blenderbim/bim/prop.py

@@ -543,6 +543,8 @@ class BIMCameraProperties(PropertyGroup):
     view_name: StringProperty(name="View Name")
     diagram_scale: EnumProperty(items=getDiagramScales, name='Drawing Scale')
     custom_diagram_scale: StringProperty(name='Custom Scale')
+    raster_x: IntProperty(name='Raster X', default=1000)
+    raster_y: IntProperty(name='Raster Y', default=1000)
     is_nts: BoolProperty(name='Is NTS')
     cut_objects: EnumProperty(items=[
         ('.IfcWall|.IfcSlab|.IfcCurtainWall|.IfcStair|.IfcStairFlight|.IfcColumn|.IfcBeam|.IfcMember|.IfcCovering',

src/ifcblenderexport/blenderbim/bim/ui.py

@@ -906,6 +906,11 @@ class BIM_PT_camera(Panel):
             row = layout.row()
             row.prop(props, 'cut_objects_custom')
 
+        row = layout.row()
+        row.prop(props, 'raster_x')
+        row = layout.row()
+        row.prop(props, 'raster_y')
+
         row = layout.row()
         row.prop(props, 'diagram_scale')
         if props.diagram_scale == 'CUSTOM':