forked from bartvdbraak/blender
BGE: [#19836] Recursive Parenting in game crashes Blender. Added parenting loop detection.
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@ -234,7 +234,11 @@ KX_GameObject* KX_GameObject::GetParent()
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void KX_GameObject::SetParent(KX_Scene *scene, KX_GameObject* obj, bool addToCompound, bool ghost)
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{
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// check on valid node in case a python controller holds a reference to a deleted object
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if (obj && GetSGNode() && obj->GetSGNode() && GetSGNode()->GetSGParent() != obj->GetSGNode())
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if (obj &&
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GetSGNode() && // object is not zombi
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obj->GetSGNode() && // object is not zombi
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GetSGNode()->GetSGParent() != obj->GetSGNode() && // not already parented to same object
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!GetSGNode()->IsAncessor(obj->GetSGNode())) // no parenting loop
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{
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// Make sure the objects have some scale
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MT_Vector3 scale1 = NodeGetWorldScaling();
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@ -150,6 +150,12 @@ GetRootSGParent(
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return (m_SGparent ? (const SG_Node*) m_SGparent->GetRootSGParent() : (const SG_Node*) this);
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}
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bool SG_Node::IsAncessor(const SG_Node* child) const
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{
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return (!child->m_SGparent) ? false :
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(child->m_SGparent == this) ? true : IsAncessor(child->m_SGparent);
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}
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void
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SG_Node::
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DisconnectFromParent(
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@ -77,6 +77,13 @@ public:
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SG_Node* child
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);
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/**
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* Return true if the node is the ancessor of child
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*/
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bool
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IsAncessor(
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const SG_Node* child
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) const;
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/**
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* Get the current list of children. Do not use this interface for
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* adding or removing children please use the methods of this class for
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