Panda3D
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00001 // Filename: nodePathComponent.h 00002 // Created by: drose (25Feb02) 00003 // 00004 //////////////////////////////////////////////////////////////////// 00005 // 00006 // PANDA 3D SOFTWARE 00007 // Copyright (c) Carnegie Mellon University. All rights reserved. 00008 // 00009 // All use of this software is subject to the terms of the revised BSD 00010 // license. You should have received a copy of this license along 00011 // with this source code in a file named "LICENSE." 00012 // 00013 //////////////////////////////////////////////////////////////////// 00014 00015 #ifndef NODEPATHCOMPONENT_H 00016 #define NODEPATHCOMPONENT_H 00017 00018 #include "pandabase.h" 00019 00020 #include "pandaNode.h" 00021 #include "pointerTo.h" 00022 #include "referenceCount.h" 00023 #include "cycleData.h" 00024 #include "cycleDataReader.h" 00025 #include "cycleDataWriter.h" 00026 #include "cycleDataLockedStageReader.h" 00027 #include "cycleDataStageReader.h" 00028 #include "cycleDataStageWriter.h" 00029 #include "lightMutex.h" 00030 #include "deletedChain.h" 00031 00032 //////////////////////////////////////////////////////////////////// 00033 // Class : NodePathComponent 00034 // Description : This is one component of a NodePath. These are 00035 // stored on each PandaNode, as many as one for each of 00036 // the possible instances of the node (but they only 00037 // exist when they are requested, to minimize memory 00038 // waste). A NodePath represents a singly-linked list 00039 // of these from an arbitrary component in the graph to 00040 // the root. 00041 // 00042 // This whole NodePath system is used to disambiguate 00043 // instances in the scene graph, and the 00044 // NodePathComponents are stored in the nodes themselves 00045 // to allow the nodes to keep these up to date as the 00046 // scene graph is manipulated. 00047 //////////////////////////////////////////////////////////////////// 00048 class EXPCL_PANDA_PGRAPH NodePathComponent : public ReferenceCount { 00049 private: 00050 NodePathComponent(PandaNode *node, NodePathComponent *next, 00051 int pipeline_stage, Thread *current_thread); 00052 INLINE NodePathComponent(const NodePathComponent ©); 00053 INLINE void operator = (const NodePathComponent ©); 00054 00055 public: 00056 INLINE ~NodePathComponent(); 00057 ALLOC_DELETED_CHAIN(NodePathComponent); 00058 00059 INLINE PandaNode *get_node() const; 00060 INLINE bool has_key() const; 00061 int get_key() const; 00062 bool is_top_node(int pipeline_stage, Thread *current_thread) const; 00063 00064 NodePathComponent *get_next(int pipeline_stage, Thread *current_thread) const; 00065 int get_length(int pipeline_stage, Thread *current_thread) const; 00066 00067 bool fix_length(int pipeline_stage, Thread *current_thread); 00068 00069 void output(ostream &out) const; 00070 00071 private: 00072 void set_next(NodePathComponent *next, int pipeline_stage, Thread *current_thread); 00073 void set_top_node(int pipeline_stage, Thread *current_thread); 00074 00075 // We don't have to cycle the _node and _key elements, since these 00076 // are permanent properties of this object. (Well, the _key is 00077 // semi-permanent: it becomes permanent after it has been set the 00078 // first time.) 00079 PT(PandaNode) _node; 00080 int _key; 00081 00082 // This is the data that must be cycled between pipeline stages. 00083 class EXPCL_PANDA_PGRAPH CData : public CycleData { 00084 public: 00085 INLINE CData(); 00086 CData(const CData ©); 00087 ALLOC_DELETED_CHAIN(CData); 00088 virtual CycleData *make_copy() const; 00089 virtual TypeHandle get_parent_type() const { 00090 return NodePathComponent::get_class_type(); 00091 } 00092 00093 PT(NodePathComponent) _next; 00094 int _length; 00095 00096 public: 00097 static TypeHandle get_class_type() { 00098 return _type_handle; 00099 } 00100 static void init_type() { 00101 register_type(_type_handle, "NodePathComponent::CData"); 00102 } 00103 00104 private: 00105 static TypeHandle _type_handle; 00106 }; 00107 00108 PipelineCycler<CData> _cycler; 00109 typedef CycleDataReader<CData> CDReader; 00110 typedef CycleDataWriter<CData> CDWriter; 00111 typedef CycleDataLockedStageReader<CData> CDLockedStageReader; 00112 typedef CycleDataStageReader<CData> CDStageReader; 00113 typedef CycleDataStageWriter<CData> CDStageWriter; 00114 00115 static int _next_key; 00116 static LightMutex _key_lock; 00117 00118 public: 00119 static TypeHandle get_class_type() { 00120 return _type_handle; 00121 } 00122 static void init_type() { 00123 ReferenceCount::init_type(); 00124 register_type(_type_handle, "NodePathComponent", 00125 ReferenceCount::get_class_type()); 00126 CData::init_type(); 00127 } 00128 00129 private: 00130 static TypeHandle _type_handle; 00131 friend class PandaNode; 00132 }; 00133 00134 INLINE ostream &operator << (ostream &out, const NodePathComponent &comp); 00135 00136 #include "nodePathComponent.I" 00137 00138 #endif