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showBoundsEffect.cxx
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1/**
2 * PANDA 3D SOFTWARE
3 * Copyright (c) Carnegie Mellon University. All rights reserved.
4 *
5 * All use of this software is subject to the terms of the revised BSD
6 * license. You should have received a copy of this license along
7 * with this source code in a file named "LICENSE."
8 *
9 * @file showBoundsEffect.cxx
10 * @author drose
11 * @date 2002-03-25
12 */
13
14#include "showBoundsEffect.h"
15#include "bamReader.h"
16#include "bamWriter.h"
17#include "datagram.h"
18#include "datagramIterator.h"
19
20 TypeHandle ShowBoundsEffect::_type_handle;
21
22/**
23 * Constructs a new ShowBoundsEffect object.
24 */
25CPT(RenderEffect) ShowBoundsEffect::
26 make(bool tight) {
27 ShowBoundsEffect *effect = new ShowBoundsEffect;
28 effect->_tight = tight;
29 return return_new(effect);
30}
31
32/**
33 * Returns true if this kind of effect can safely be combined with sibling
34 * nodes that share the exact same effect, or false if this is not a good
35 * idea.
36 */
37 bool ShowBoundsEffect::
38safe_to_combine() const {
39 return false;
40}
41
42/**
43 * Intended to be overridden by derived ShowBoundsEffect types to return a
44 * unique number indicating whether this ShowBoundsEffect is equivalent to the
45 * other one.
46 *
47 * This should return 0 if the two ShowBoundsEffect objects are equivalent, a
48 * number less than zero if this one should be sorted before the other one,
49 * and a number greater than zero otherwise.
50 *
51 * This will only be called with two ShowBoundsEffect objects whose get_type()
52 * functions return the same.
53 */
54 int ShowBoundsEffect::
55compare_to_impl(const RenderEffect *other) const {
56 const ShowBoundsEffect *ta;
57 DCAST_INTO_R(ta, other, 0);
58
59 return (int)_tight - (int)ta->_tight;
60}
61
62/**
63 * Tells the BamReader how to create objects of type ShowBoundsEffect.
64 */
65 void ShowBoundsEffect::
66 register_with_read_factory() {
67 BamReader::get_factory()->register_factory(get_class_type(), make_from_bam);
68}
69
70/**
71 * Writes the contents of this object to the datagram for shipping out to a
72 * Bam file.
73 */
74 void ShowBoundsEffect::
75 write_datagram(BamWriter *manager, Datagram &dg) {
76 RenderEffect::write_datagram(manager, dg);
77 dg.add_bool(_tight);
78}
79
80/**
81 * This function is called by the BamReader's factory when a new object of
82 * type ShowBoundsEffect is encountered in the Bam file. It should create the
83 * ShowBoundsEffect and extract its information from the file.
84 */
85 TypedWritable *ShowBoundsEffect::
86make_from_bam(const FactoryParams &params) {
87 ShowBoundsEffect *effect = new ShowBoundsEffect;
88 DatagramIterator scan;
89 BamReader *manager;
90
91 parse_params(params, scan, manager);
92 effect->fillin(scan, manager);
93
94 return effect;
95}
96
97/**
98 * This internal function is called by make_from_bam to read in all of the
99 * relevant data from the BamFile for the new ShowBoundsEffect.
100 */
101 void ShowBoundsEffect::
102fillin(DatagramIterator &scan, BamReader *manager) {
103 RenderEffect::fillin(scan, manager);
104 _tight = scan.get_bool();
105}
bamReader.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
parse_params
void parse_params(const FactoryParams &params, DatagramIterator &scan, BamReader *&manager)
Takes in a FactoryParams, passed from a WritableFactory into any TypedWritable's make function,...
Definition bamReader.I:275
bamWriter.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
BamReader
This is the fundamental interface for extracting binary objects from a Bam file, as generated by a Ba...
Definition bamReader.h:110
BamReader::get_factory
static WritableFactory * get_factory()
Returns the global WritableFactory for generating TypedWritable objects.
Definition bamReader.I:177
DatagramIterator
A class to retrieve the individual data elements previously stored in a Datagram.
Definition datagramIterator.h:30
DatagramIterator::get_bool
bool get_bool()
Extracts a boolean value.
Definition datagramIterator.I:48
Datagram
An ordered list of data elements, formatted in memory for transmission over a socket or writing to a ...
Definition datagram.h:38
Datagram::add_bool
void add_bool(bool value)
Adds a boolean value to the datagram.
Definition datagram.I:34
FactoryParams
An instance of this class is passed to the Factory when requesting it to do its business and construc...
Definition factoryParams.h:36
Factory::register_factory
void register_factory(TypeHandle handle, CreateFunc *func, void *user_data=nullptr)
Registers a new kind of thing the Factory will be able to create.
Definition factory.I:73
RenderEffect
This is the base class for a number of special render effects that may be set on scene graph nodes to...
Definition renderEffect.h:48
RenderEffect::write_datagram
virtual void write_datagram(BamWriter *manager, Datagram &dg)
Writes the contents of this object to the datagram for shipping out to a Bam file.
Definition renderEffect.cxx:283
ShowBoundsEffect
Applied to a GeomNode to cause a visible bounding volume to be drawn for this node.
Definition showBoundsEffect.h:28
ShowBoundsEffect::register_with_read_factory
static void register_with_read_factory()
Tells the BamReader how to create objects of type ShowBoundsEffect.
Definition showBoundsEffect.cxx:66
ShowBoundsEffect::write_datagram
virtual void write_datagram(BamWriter *manager, Datagram &dg)
Writes the contents of this object to the datagram for shipping out to a Bam file.
Definition showBoundsEffect.cxx:75
ShowBoundsEffect::make
static ConstPointerTo< RenderEffect > make(bool tight=false)
Constructs a new ShowBoundsEffect object.
Definition showBoundsEffect.cxx:26
TypeHandle
TypeHandle is the identifier used to differentiate C++ class types.
Definition typeHandle.h:81
TypedWritable
Base class for objects that can be written to and read from Bam files.
Definition typedWritable.h:35
datagramIterator.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
datagram.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
showBoundsEffect.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.