Panda3D
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animBundleNode.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 animBundleNode.cxx
10 * @author drose
11 * @date 2002-03-06
12 */
13
14#include "animBundleNode.h"
15#include "datagram.h"
16#include "datagramIterator.h"
17#include "bamReader.h"
18#include "bamWriter.h"
19
20TypeHandle AnimBundleNode::_type_handle;
21
22
23/**
24 *
25 */
27make_copy() const {
28 return new AnimBundleNode(*this);
29}
30
31/**
32 * Returns true if it is generally safe to flatten out this particular kind of
33 * Node by duplicating instances, false otherwise (for instance, a Camera
34 * cannot be safely flattened, because the Camera pointer itself is
35 * meaningful).
36 */
38safe_to_flatten() const {
39 return false;
40}
41
42/**
43 * Recursively walks the scene graph beginning at the indicated node (which
44 * need not be an AnimBundleNode), and returns the first AnimBundle found.
45 * Returns NULL if no AnimBundle can be found.
46 */
49 nassertr(root != nullptr, nullptr);
50
51 if (root->is_of_type(AnimBundleNode::get_class_type())) {
52 AnimBundleNode *anode = DCAST(AnimBundleNode, root);
53 AnimBundle *anim = anode->get_bundle();
54 if (anim != nullptr) {
55 return anim;
56 }
57 }
58
59 Children cr = root->get_children();
60 int num_children = cr.get_num_children();
61 for (int i = 0; i < num_children; i++) {
63 if (anim != nullptr) {
64 return anim;
65 }
66 }
67
68 return nullptr;
69}
70
71/**
72 *
73 */
74void AnimBundleNode::
75output(std::ostream &out) const {
76 PandaNode::output(out);
77 if (_bundle != nullptr) {
78 out << " (";
79 _bundle->output(out);
80 out << ")";
81 }
82}
83
84/**
85 * Tells the BamReader how to create objects of type AnimBundleNode.
86 */
89 BamReader::get_factory()->register_factory(get_class_type(), make_from_bam);
90}
91
92/**
93 * Writes the contents of this object to the datagram for shipping out to a
94 * Bam file.
95 */
97write_datagram(BamWriter *manager, Datagram &dg) {
98 PandaNode::write_datagram(manager, dg);
99 manager->write_pointer(dg, _bundle);
100}
101
102/**
103 * Receives an array of pointers, one for each time manager->read_pointer()
104 * was called in fillin(). Returns the number of pointers processed.
105 */
107complete_pointers(TypedWritable **p_list, BamReader* manager) {
108 int pi = PandaNode::complete_pointers(p_list, manager);
109 _bundle = DCAST(AnimBundle, p_list[pi++]);
110 return pi;
111}
112
113/**
114 * This function is called by the BamReader's factory when a new object of
115 * this type is encountered in the Bam file. It should create the object and
116 * extract its information from the file.
117 */
118TypedWritable *AnimBundleNode::
119make_from_bam(const FactoryParams &params) {
120 AnimBundleNode *node = new AnimBundleNode;
121 DatagramIterator scan;
122 BamReader *manager;
123
124 parse_params(params, scan, manager);
125 node->fillin(scan, manager);
126
127 return node;
128}
129
130/**
131 * This internal function is called by make_from_bam to read in all of the
132 * relevant data from the BamFile for the new PandaNode.
133 */
134void AnimBundleNode::
135fillin(DatagramIterator &scan, BamReader* manager) {
136 PandaNode::fillin(scan, manager);
137 manager->read_pointer(scan);
138}
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
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
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
This is a node that contains a pointer to an AnimBundle.
virtual bool safe_to_flatten() const
Returns true if it is generally safe to flatten out this particular kind of Node by duplicating insta...
virtual int complete_pointers(TypedWritable **p_list, BamReader *manager)
Receives an array of pointers, one for each time manager->read_pointer() was called in fillin().
static void register_with_read_factory()
Tells the BamReader how to create objects of type AnimBundleNode.
static AnimBundle * find_anim_bundle(PandaNode *root)
Recursively walks the scene graph beginning at the indicated node (which need not be an AnimBundleNod...
virtual PandaNode * make_copy() const
Returns a newly-allocated PandaNode that is a shallow copy of this one.
virtual void write_datagram(BamWriter *manager, Datagram &me)
Writes the contents of this object to the datagram for shipping out to a Bam file.
This is the root of an AnimChannel hierarchy.
Definition animBundle.h:29
This is the fundamental interface for extracting binary objects from a Bam file, as generated by a Ba...
Definition bamReader.h:110
bool read_pointer(DatagramIterator &scan)
The interface for reading a pointer to another object from a Bam file.
static WritableFactory * get_factory()
Returns the global WritableFactory for generating TypedWritable objects.
Definition bamReader.I:177
This is the fundamental interface for writing binary objects to a Bam file, to be extracted later by ...
Definition bamWriter.h:63
void write_pointer(Datagram &packet, const TypedWritable *dest)
The interface for writing a pointer to another object to a Bam file.
A class to retrieve the individual data elements previously stored in a Datagram.
An ordered list of data elements, formatted in memory for transmission over a socket or writing to a ...
Definition datagram.h:38
An instance of this class is passed to the Factory when requesting it to do its business and construc...
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
PandaNode * get_child(size_t n) const
Returns the nth child of the node.
Definition pandaNode.I:962
size_t get_num_children() const
Returns the number of children of the node.
Definition pandaNode.I:953
A basic node of the scene graph or data graph.
Definition pandaNode.h:65
get_children
Returns an object that can be used to walk through the list of children of the node.
Definition pandaNode.h:782
virtual void write_datagram(BamWriter *manager, Datagram &dg)
Writes the contents of this object to the datagram for shipping out to a Bam file.
TypeHandle is the identifier used to differentiate C++ class types.
Definition typeHandle.h:81
bool is_of_type(TypeHandle handle) const
Returns true if the current object is or derives from the indicated type.
Definition typedObject.I:28
Base class for objects that can be written to and read from Bam files.
virtual int complete_pointers(TypedWritable **p_list, BamReader *manager)
Receives an array of pointers, one for each time manager->read_pointer() was called in fillin().
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.