When exporting section boxes from Revit, apply negated model transfor…

…mations

src/IPA.Bcfier.Revit/Services/RevitViewpointCreationService.cs

@@ -214,6 +214,10 @@ private static List<BcfViewpointClippingPlane> GetBcfClippingPlanes(UIDocument u
             }
 
             BoundingBoxXYZ sectionBox = view3D.GetSectionBox();
+
+            var transform = uiDocument.Document.ActiveProjectLocation.GetTransform().Inverse;
+            sectionBox.Transform = transform;
+
             XYZ transformedMin = sectionBox.Transform.OfPoint(sectionBox.Min);
             XYZ transformedMax = sectionBox.Transform.OfPoint(sectionBox.Max);
             Vector3 minCorner = transformedMin.ToVector3().ToMeters();