Panda3D
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00001 // Filename: selectiveChildNode.h 00002 // Created by: drose (06Mar02) 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 SELECTIVECHILDNODE_H 00016 #define SELECTIVECHILDNODE_H 00017 00018 #include "pandabase.h" 00019 00020 #include "pandaNode.h" 00021 00022 //////////////////////////////////////////////////////////////////// 00023 // Class : SelectiveChildNode 00024 // Description : A base class for nodes like LODNode and SequenceNode 00025 // that select only one visible child at a time. 00026 //////////////////////////////////////////////////////////////////// 00027 class EXPCL_PANDA_PGRAPHNODES SelectiveChildNode : public PandaNode { 00028 PUBLISHED: 00029 INLINE SelectiveChildNode(const string &name); 00030 00031 protected: 00032 INLINE SelectiveChildNode(const SelectiveChildNode ©); 00033 00034 public: 00035 virtual bool has_selective_visibility() const; 00036 virtual int get_first_visible_child() const; 00037 virtual int get_next_visible_child(int n) const; 00038 00039 protected: 00040 INLINE void select_child(int n); 00041 00042 private: 00043 // Not sure if this should be cycled or not. It's not exactly 00044 // thread-safe not to cycle it, but it doesn't really need the full 00045 // pipeline control. It's probably a problem in the non-thread-safe 00046 // design; need to rethink the design a bit. 00047 int _selected_child; 00048 00049 public: 00050 static TypeHandle get_class_type() { 00051 return _type_handle; 00052 } 00053 static void init_type() { 00054 PandaNode::init_type(); 00055 register_type(_type_handle, "SelectiveChildNode", 00056 PandaNode::get_class_type()); 00057 } 00058 virtual TypeHandle get_type() const { 00059 return get_class_type(); 00060 } 00061 virtual TypeHandle force_init_type() {init_type(); return get_class_type();} 00062 00063 private: 00064 static TypeHandle _type_handle; 00065 }; 00066 00067 #include "selectiveChildNode.I" 00068 00069 #endif