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decalEffect.cxx
00001 // Filename: decalEffect.cxx
00002 // Created by:  drose (14Mar02)
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 "decalEffect.h"
00016 #include "bamReader.h"
00017 #include "bamWriter.h"
00018 #include "datagram.h"
00019 #include "datagramIterator.h"
00020 
00021 TypeHandle DecalEffect::_type_handle;
00022 
00023 ////////////////////////////////////////////////////////////////////
00024 //     Function: DecalEffect::make
00025 //       Access: Published, Static
00026 //  Description: Constructs a new DecalEffect object.
00027 ////////////////////////////////////////////////////////////////////
00028 CPT(RenderEffect) DecalEffect::
00029 make() {
00030   DecalEffect *effect = new DecalEffect;
00031   return return_new(effect);
00032 }
00033 
00034 ////////////////////////////////////////////////////////////////////
00035 //     Function: DecalEffect::safe_to_combine
00036 //       Access: Public, Virtual
00037 //  Description: Returns true if this kind of effect can safely be
00038 //               combined with sibling nodes that share the exact same
00039 //               effect, or false if this is not a good idea.
00040 ////////////////////////////////////////////////////////////////////
00041 bool DecalEffect::
00042 safe_to_combine() const {
00043   return false;
00044 }
00045 
00046 ////////////////////////////////////////////////////////////////////
00047 //     Function: DecalEffect::compare_to_impl
00048 //       Access: Protected, Virtual
00049 //  Description: Intended to be overridden by derived DecalEffect
00050 //               types to return a unique number indicating whether
00051 //               this DecalEffect is equivalent to the other one.
00052 //
00053 //               This should return 0 if the two DecalEffect objects
00054 //               are equivalent, a number less than zero if this one
00055 //               should be sorted before the other one, and a number
00056 //               greater than zero otherwise.
00057 //
00058 //               This will only be called with two DecalEffect
00059 //               objects whose get_type() functions return the same.
00060 ////////////////////////////////////////////////////////////////////
00061 int DecalEffect::
00062 compare_to_impl(const RenderEffect *other) const {
00063   // All DecalEffects are equivalent--there are no properties to
00064   // store.
00065   return 0;
00066 }
00067 
00068 ////////////////////////////////////////////////////////////////////
00069 //     Function: DecalEffect::register_with_read_factory
00070 //       Access: Public, Static
00071 //  Description: Tells the BamReader how to create objects of type
00072 //               DecalEffect.
00073 ////////////////////////////////////////////////////////////////////
00074 void DecalEffect::
00075 register_with_read_factory() {
00076   BamReader::get_factory()->register_factory(get_class_type(), make_from_bam);
00077 }
00078 
00079 ////////////////////////////////////////////////////////////////////
00080 //     Function: DecalEffect::write_datagram
00081 //       Access: Public, Virtual
00082 //  Description: Writes the contents of this object to the datagram
00083 //               for shipping out to a Bam file.
00084 ////////////////////////////////////////////////////////////////////
00085 void DecalEffect::
00086 write_datagram(BamWriter *manager, Datagram &dg) {
00087   RenderEffect::write_datagram(manager, dg);
00088 }
00089 
00090 ////////////////////////////////////////////////////////////////////
00091 //     Function: DecalEffect::make_from_bam
00092 //       Access: Protected, Static
00093 //  Description: This function is called by the BamReader's factory
00094 //               when a new object of type DecalEffect is encountered
00095 //               in the Bam file.  It should create the DecalEffect
00096 //               and extract its information from the file.
00097 ////////////////////////////////////////////////////////////////////
00098 TypedWritable *DecalEffect::
00099 make_from_bam(const FactoryParams &params) {
00100   DecalEffect *effect = new DecalEffect;
00101   DatagramIterator scan;
00102   BamReader *manager;
00103 
00104   parse_params(params, scan, manager);
00105   effect->fillin(scan, manager);
00106 
00107   return effect;
00108 }
00109 
00110 ////////////////////////////////////////////////////////////////////
00111 //     Function: DecalEffect::fillin
00112 //       Access: Protected
00113 //  Description: This internal function is called by make_from_bam to
00114 //               read in all of the relevant data from the BamFile for
00115 //               the new DecalEffect.
00116 ////////////////////////////////////////////////////////////////////
00117 void DecalEffect::
00118 fillin(DatagramIterator &scan, BamReader *manager) {
00119   RenderEffect::fillin(scan, manager);
00120 }
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