Panda3D
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00001 // Filename: occlusionQueryContext.h 00002 // Created by: drose (27Mar06) 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 OCCLUSIONQUERYCONTEXT_H 00016 #define OCCLUSIONQUERYCONTEXT_H 00017 00018 #include "pandabase.h" 00019 #include "queryContext.h" 00020 00021 //////////////////////////////////////////////////////////////////// 00022 // Class : OcclusionQueryContext 00023 // Description : Returned from a GSG in response to 00024 // begin_occlusion_query() .. end_occlusion_query(), 00025 // this records the number of fragments (pixels) that 00026 // passed the depth test between the bracketing calls. 00027 //////////////////////////////////////////////////////////////////// 00028 class EXPCL_PANDA_GOBJ OcclusionQueryContext : public QueryContext { 00029 public: 00030 INLINE OcclusionQueryContext(); 00031 00032 virtual int get_num_fragments() const=0; 00033 00034 public: 00035 static TypeHandle get_class_type() { 00036 return _type_handle; 00037 } 00038 static void init_type() { 00039 QueryContext::init_type(); 00040 register_type(_type_handle, "OcclusionQueryContext", 00041 QueryContext::get_class_type()); 00042 } 00043 virtual TypeHandle get_type() const { 00044 return get_class_type(); 00045 } 00046 virtual TypeHandle force_init_type() {init_type(); return get_class_type();} 00047 00048 private: 00049 static TypeHandle _type_handle; 00050 00051 friend class PreparedGraphicsObjects; 00052 }; 00053 00054 #include "occlusionQueryContext.I" 00055 00056 #endif 00057