Preserve node level data variance when merging objects in the active grid

CHANGELOG.md

@@ -202,6 +202,7 @@
     Bug #8206: Moving away from storm wind origin should make you faster
     Bug #8207: Using hand-to-hand while sneaking plays the critical hit sound when the target is not getting hurt
     Bug #8208: The launcher's view distance option's minimum value isn't capped to Vanilla's minimum
+    Bug #8231: AGOP doesn't like NiCollisionSwitch
     Feature #1415: Infinite fall failsafe
     Feature #2566: Handle NAM9 records for manual cell references
     Feature #3501: OpenMW-CS: Instance Editing - Shortcuts for axial locking

apps/openmw/mwrender/objectpaging.cpp

@@ -133,11 +133,18 @@ namespace MWRender
         {
         public:
             bool mOptimizeBillboards = true;
+            bool mActiveGrid = false;
             LODRange mDistances = { 0.f, 0.f };
             osg::Vec3f mViewVector;
             osg::Node::NodeMask mCopyMask = ~0u;
             mutable std::vector<const osg::Node*> mNodePath;
 
+            CopyOp(bool activeGrid, osg::Node::NodeMask copyMask)
+                : mActiveGrid(activeGrid)
+                , mCopyMask(copyMask)
+            {
+            }
+
             void copy(const osg::Node* toCopy, osg::Group* attachTo)
             {
                 const osg::Group* groupToCopy = toCopy->asGroup();
@@ -203,6 +210,7 @@ namespace MWRender
                 mNodePath.push_back(node);
 
                 osg::Node* cloned = static_cast<osg::Node*>(node->clone(*this));
+                if (!mActiveGrid)
                     cloned->setDataVariance(osg::Object::STATIC);
                 cloned->setUserDataContainer(nullptr);
                 cloned->setName("");
@@ -720,8 +728,7 @@ namespace MWRender
         osg::ref_ptr<osg::Group> mergeGroup = new osg::Group;
         osg::ref_ptr<Resource::TemplateMultiRef> templateRefs = new Resource::TemplateMultiRef;
         osgUtil::StateToCompile stateToCompile(0, nullptr);
-        CopyOp copyop;
+        CopyOp copyop(activeGrid, copyMask);
-        copyop.mCopyMask = copyMask;
         for (const auto& pair : nodes)
         {
             const osg::Node* cnode = pair.first;