Autogenerated collision should only be disabled if RootCollisionNode is a child of the root node (Fixes #2133)

components/nifbullet/bulletnifloader.cpp

@@ -95,7 +95,7 @@ void ManualBulletShapeLoader::loadResource(Ogre::Resource *resource)
         return;
     }
 
-    mShape->mHasCollisionNode = hasRootCollisionNode(node);
+    mShape->mAutogenerated = hasAutoGeneratedCollision(node);
 
     //do a first pass
     handleNode(node,0,false,false,false);
@@ -152,12 +152,9 @@ void ManualBulletShapeLoader::loadResource(Ogre::Resource *resource)
         mShape->mRaycastingShape = new TriangleMeshShape(mStaticMesh,true);
 }
 
-bool ManualBulletShapeLoader::hasRootCollisionNode(Nif::Node const * node)
+bool ManualBulletShapeLoader::hasAutoGeneratedCollision(Nif::Node const * rootNode)
 {
-    if(node->recType == Nif::RC_RootCollisionNode)
-        return true;
-
-    const Nif::NiNode *ninode = dynamic_cast<const Nif::NiNode*>(node);
+    const Nif::NiNode *ninode = dynamic_cast<const Nif::NiNode*>(rootNode);
     if(ninode)
     {
         const Nif::NodeList &list = ninode->children;
@@ -165,13 +162,12 @@ bool ManualBulletShapeLoader::hasRootCollisionNode(Nif::Node const * node)
         {
             if(!list[i].empty())
             {
-                if(hasRootCollisionNode(list[i].getPtr()))
-                    return true;
+                if(list[i].getPtr()->recType == Nif::RC_RootCollisionNode)
+                    return false;
             }
         }
     }
-
-    return false;
+    return true;
 }
 
 void ManualBulletShapeLoader::handleNode(const Nif::Node *node, int flags,
@@ -230,8 +226,8 @@ void ManualBulletShapeLoader::handleNode(const Nif::Node *node, int flags,
         }
     }
 
-    if ( (isCollisionNode || (!mShape->mHasCollisionNode && !raycasting))
-            && (!isMarker || (mShape->mHasCollisionNode && !raycasting)))
+    if ( (isCollisionNode || (mShape->mAutogenerated && !raycasting))
+            && (!isMarker || (!mShape->mAutogenerated && !raycasting)))
     {
         // NOTE: a trishape with hasBounds=true, but no BBoxCollision flag should NOT go through handleNiTriShape!
         // It must be ignored completely.

components/nifbullet/bulletnifloader.hpp

@@ -112,7 +112,7 @@ private:
     /**
     *Helper function
     */
-    bool hasRootCollisionNode(const Nif::Node *node);
+    bool hasAutoGeneratedCollision(const Nif::Node *rootNode);
 
     /**
     *convert a NiTriShape to a bullet trishape.

libs/openengine/bullet/BulletShapeLoader.cpp

@@ -19,7 +19,7 @@ Ogre::Resource(creator, name, handle, group, isManual, loader)
     */
     mCollisionShape = NULL;
     mRaycastingShape = NULL;
-    mHasCollisionNode = false;
+    mAutogenerated = true;
     mCollide = true;
     createParamDictionary("BulletShape");
 }

libs/openengine/bullet/BulletShapeLoader.h

@@ -41,9 +41,8 @@ public:
     btCollisionShape* mCollisionShape;
     btCollisionShape* mRaycastingShape;
 
-    // Whether or not a NiRootCollisionNode was present in the .nif. If there is none, the collision behaviour
-    // depends on object type, so we need to expose this variable.
-    bool mHasCollisionNode;
+    // Does this .nif have an autogenerated collision mesh?
+    bool mAutogenerated;
 
     Ogre::Vector3 mBoxTranslation;
     Ogre::Quaternion mBoxRotation;

libs/openengine/bullet/physic.cpp

@@ -456,7 +456,7 @@ namespace Physic
         BulletShapeManager::getSingletonPtr()->load(outputstring,"General");
         BulletShapePtr shape = BulletShapeManager::getSingleton().getByName(outputstring,"General");
 
-        if (placeable && !raycasting && shape->mCollisionShape && !shape->mHasCollisionNode)
+        if (placeable && !raycasting && shape->mCollisionShape && shape->mAutogenerated)
             return NULL;
 
         if (!shape->mCollisionShape && !raycasting)