Panda3D
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00001 // Filename: cullBinAttrib.cxx 00002 // Created by: drose (01Mar02) 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 #include "cullBinAttrib.h" 00016 #include "bamReader.h" 00017 #include "bamWriter.h" 00018 #include "datagram.h" 00019 #include "datagramIterator.h" 00020 00021 TypeHandle CullBinAttrib::_type_handle; 00022 int CullBinAttrib::_attrib_slot; 00023 00024 //////////////////////////////////////////////////////////////////// 00025 // Function: CullBinAttrib::make 00026 // Access: Published, Static 00027 // Description: Constructs a new CullBinAttrib assigning geometry 00028 // into the named bin. If the bin name is the empty 00029 // string, the default bin is used. 00030 // 00031 // The draw_order specifies further ordering information 00032 // which is relevant only to certain kinds of bins (in 00033 // particular CullBinFixed type bins). 00034 //////////////////////////////////////////////////////////////////// 00035 CPT(RenderAttrib) CullBinAttrib:: 00036 make(const string &bin_name, int draw_order) { 00037 CullBinAttrib *attrib = new CullBinAttrib; 00038 attrib->_bin_name = bin_name; 00039 attrib->_draw_order = draw_order; 00040 return return_new(attrib); 00041 } 00042 00043 //////////////////////////////////////////////////////////////////// 00044 // Function: CullBinAttrib::make_default 00045 // Access: Published, Static 00046 // Description: Returns a RenderAttrib that corresponds to whatever 00047 // the standard default properties for render attributes 00048 // of this type ought to be. 00049 //////////////////////////////////////////////////////////////////// 00050 CPT(RenderAttrib) CullBinAttrib:: 00051 make_default() { 00052 return return_new(new CullBinAttrib); 00053 } 00054 00055 //////////////////////////////////////////////////////////////////// 00056 // Function: CullBinAttrib::output 00057 // Access: Public, Virtual 00058 // Description: 00059 //////////////////////////////////////////////////////////////////// 00060 void CullBinAttrib:: 00061 output(ostream &out) const { 00062 out << get_type() << ":"; 00063 if (_bin_name.empty()) { 00064 out << "(default)"; 00065 } else { 00066 out << _bin_name << "," << _draw_order; 00067 } 00068 } 00069 00070 //////////////////////////////////////////////////////////////////// 00071 // Function: CullBinAttrib::compare_to_impl 00072 // Access: Protected, Virtual 00073 // Description: Intended to be overridden by derived CullBinAttrib 00074 // types to return a unique number indicating whether 00075 // this CullBinAttrib is equivalent to the other one. 00076 // 00077 // This should return 0 if the two CullBinAttrib objects 00078 // are equivalent, a number less than zero if this one 00079 // should be sorted before the other one, and a number 00080 // greater than zero otherwise. 00081 // 00082 // This will only be called with two CullBinAttrib 00083 // objects whose get_type() functions return the same. 00084 //////////////////////////////////////////////////////////////////// 00085 int CullBinAttrib:: 00086 compare_to_impl(const RenderAttrib *other) const { 00087 const CullBinAttrib *ta; 00088 DCAST_INTO_R(ta, other, 0); 00089 if (_draw_order != ta->_draw_order) { 00090 return _draw_order - ta->_draw_order; 00091 } 00092 return strcmp(_bin_name.c_str(), ta->_bin_name.c_str()); 00093 } 00094 00095 //////////////////////////////////////////////////////////////////// 00096 // Function: CullBinAttrib::register_with_read_factory 00097 // Access: Public, Static 00098 // Description: Tells the BamReader how to create objects of type 00099 // CullBinAttrib. 00100 //////////////////////////////////////////////////////////////////// 00101 void CullBinAttrib:: 00102 register_with_read_factory() { 00103 BamReader::get_factory()->register_factory(get_class_type(), make_from_bam); 00104 } 00105 00106 //////////////////////////////////////////////////////////////////// 00107 // Function: CullBinAttrib::write_datagram 00108 // Access: Public, Virtual 00109 // Description: Writes the contents of this object to the datagram 00110 // for shipping out to a Bam file. 00111 //////////////////////////////////////////////////////////////////// 00112 void CullBinAttrib:: 00113 write_datagram(BamWriter *manager, Datagram &dg) { 00114 RenderAttrib::write_datagram(manager, dg); 00115 00116 dg.add_string(_bin_name); 00117 dg.add_int32(_draw_order); 00118 } 00119 00120 //////////////////////////////////////////////////////////////////// 00121 // Function: CullBinAttrib::make_from_bam 00122 // Access: Protected, Static 00123 // Description: This function is called by the BamReader's factory 00124 // when a new object of type CullBinAttrib is encountered 00125 // in the Bam file. It should create the CullBinAttrib 00126 // and extract its information from the file. 00127 //////////////////////////////////////////////////////////////////// 00128 TypedWritable *CullBinAttrib:: 00129 make_from_bam(const FactoryParams ¶ms) { 00130 CullBinAttrib *attrib = new CullBinAttrib; 00131 DatagramIterator scan; 00132 BamReader *manager; 00133 00134 parse_params(params, scan, manager); 00135 attrib->fillin(scan, manager); 00136 00137 return attrib; 00138 } 00139 00140 //////////////////////////////////////////////////////////////////// 00141 // Function: CullBinAttrib::fillin 00142 // Access: Protected 00143 // Description: This internal function is called by make_from_bam to 00144 // read in all of the relevant data from the BamFile for 00145 // the new CullBinAttrib. 00146 //////////////////////////////////////////////////////////////////// 00147 void CullBinAttrib:: 00148 fillin(DatagramIterator &scan, BamReader *manager) { 00149 RenderAttrib::fillin(scan, manager); 00150 00151 _bin_name = scan.get_string(); 00152 _draw_order = scan.get_int32(); 00153 }