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transformTable.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 transformTable.cxx
10 * @author drose
11 * @date 2005-03-23
12 */
13
14#include "transformTable.h"
15#include "bamReader.h"
16#include "bamWriter.h"
17
18 TypeHandle TransformTable::_type_handle;
19
20/**
21 *
22 */
23TransformTable::
24TransformTable() :
25 _is_registered(false)
26{
27}
28
29/**
30 *
31 */
32TransformTable::
33TransformTable(const TransformTable &copy) :
34 _is_registered(false),
35 _transforms(copy._transforms)
36{
37}
38
39/**
40 *
41 */
42 void TransformTable::
43operator = (const TransformTable &copy) {
44 nassertv(!_is_registered);
45 _transforms = copy._transforms;
46}
47
48/**
49 *
50 */
51TransformTable::
52~TransformTable() {
53 if (_is_registered) {
54 do_unregister();
55 }
56}
57
58/**
59 * Replaces the nth transform. Only valid for unregistered tables.
60 */
61 void TransformTable::
62 set_transform(size_t n, const VertexTransform *transform) {
63 nassertv(!_is_registered);
64 nassertv(n < _transforms.size());
65 _transforms[n] = transform;
66}
67
68/**
69 * Inserts a new transform to the table at the given index position. If the
70 * index is beyond the end of the table, appends it to the end. Only valid
71 * for unregistered tables.
72 *
73 * This does not automatically uniquify the pointer; if the transform is
74 * already present in the table, it will be added twice.
75 */
76 void TransformTable::
77 insert_transform(size_t n, const VertexTransform *transform) {
78 nassertv(!_is_registered);
79 if (n > _transforms.size()) {
80 n = _transforms.size();
81 }
82 _transforms.insert(_transforms.begin() + n, transform);
83}
84
85/**
86 * Removes the nth transform. Only valid for unregistered tables.
87 */
88 void TransformTable::
89 remove_transform(size_t n) {
90 nassertv(!_is_registered);
91 nassertv(n < _transforms.size());
92 _transforms.erase(_transforms.begin() + n);
93}
94
95/**
96 * Adds a new transform to the table and returns the index number of the new
97 * transform. Only valid for unregistered tables.
98 *
99 * This does not automatically uniquify the pointer; if the transform is
100 * already present in the table, it will be added twice.
101 */
102 size_t TransformTable::
103 add_transform(const VertexTransform *transform) {
104 nassertr(!_is_registered, -1);
105 size_t new_index = _transforms.size();
106 _transforms.push_back(transform);
107 return new_index;
108}
109
110/**
111 *
112 */
113 void TransformTable::
114write(std::ostream &out) const {
115 for (size_t i = 0; i < _transforms.size(); ++i) {
116 out << i << ". " << *_transforms[i] << "\n";
117 }
118}
119
120/**
121 * Called internally when the table is registered.
122 */
123 void TransformTable::
124do_register() {
125 nassertv(!_is_registered);
126
127 Transforms::iterator ti;
128 for (ti = _transforms.begin(); ti != _transforms.end(); ++ti) {
129 VertexTransform *transform = (VertexTransform *)(*ti).p();
130 bool inserted = transform->_tables.insert(this).second;
131 nassertv(inserted);
132 }
133 _is_registered = true;
134}
135
136/**
137 * Called internally when the table is unregistered (i.e. right before
138 * destruction).
139 */
140 void TransformTable::
141do_unregister() {
142 nassertv(_is_registered);
143
144 Transforms::iterator ti;
145 for (ti = _transforms.begin(); ti != _transforms.end(); ++ti) {
146 VertexTransform *transform = (VertexTransform *)(*ti).p();
147 transform->_tables.erase(this);
148 }
149 _is_registered = false;
150}
151
152/**
153 * Tells the BamReader how to create objects of type TransformTable.
154 */
155 void TransformTable::
156 register_with_read_factory() {
157 BamReader::get_factory()->register_factory(get_class_type(), make_from_bam);
158}
159
160/**
161 * Writes the contents of this object to the datagram for shipping out to a
162 * Bam file.
163 */
164 void TransformTable::
165 write_datagram(BamWriter *manager, Datagram &dg) {
166 TypedWritableReferenceCount::write_datagram(manager, dg);
167
168 dg.add_uint16(_transforms.size());
169 for (Transforms::const_iterator ti = _transforms.begin();
170 ti != _transforms.end();
171 ++ti) {
172 manager->write_pointer(dg, *ti);
173 }
174
175 manager->write_cdata(dg, _cycler);
176}
177
178/**
179 * Receives an array of pointers, one for each time manager->read_pointer()
180 * was called in fillin(). Returns the number of pointers processed.
181 */
182 int TransformTable::
183 complete_pointers(TypedWritable **p_list, BamReader *manager) {
184 int pi = TypedWritableReferenceCount::complete_pointers(p_list, manager);
185
186 for (Transforms::iterator ti = _transforms.begin();
187 ti != _transforms.end();
188 ++ti) {
189 (*ti) = DCAST(VertexTransform, p_list[pi++]);
190 }
191
192 return pi;
193}
194
195/**
196 * This function is called by the BamReader's factory when a new object of
197 * type TransformTable is encountered in the Bam file. It should create the
198 * TransformTable and extract its information from the file.
199 */
200 TypedWritable *TransformTable::
201make_from_bam(const FactoryParams &params) {
202 TransformTable *object = new TransformTable;
203 DatagramIterator scan;
204 BamReader *manager;
205
206 parse_params(params, scan, manager);
207 object->fillin(scan, manager);
208
209 return object;
210}
211
212/**
213 * This internal function is called by make_from_bam to read in all of the
214 * relevant data from the BamFile for the new TransformTable.
215 */
216 void TransformTable::
217fillin(DatagramIterator &scan, BamReader *manager) {
218 TypedWritableReferenceCount::fillin(scan, manager);
219
220 size_t num_transforms = scan.get_uint16();
221 _transforms.reserve(num_transforms);
222 for (size_t i = 0; i < num_transforms; ++i) {
223 manager->read_pointer(scan);
224 _transforms.push_back(nullptr);
225 }
226
227 manager->read_cdata(scan, _cycler);
228}
229
230/**
231 *
232 */
233 CycleData *TransformTable::CData::
234make_copy() const {
235 return new CData(*this);
236}
237
238/**
239 * Writes the contents of this object to the datagram for shipping out to a
240 * Bam file.
241 */
242 void TransformTable::CData::
243write_datagram(BamWriter *manager, Datagram &dg) const {
244}
245
246/**
247 * This internal function is called by make_from_bam to read in all of the
248 * relevant data from the BamFile for the new TransformTable.
249 */
250 void TransformTable::CData::
251fillin(DatagramIterator &scan, BamReader *manager) {
252 Thread *current_thread = Thread::get_current_thread();
253 _modified = VertexTransform::get_next_modified(current_thread);
254}
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::read_pointer
bool read_pointer(DatagramIterator &scan)
The interface for reading a pointer to another object from a Bam file.
Definition bamReader.cxx:610
BamReader::read_cdata
void read_cdata(DatagramIterator &scan, PipelineCyclerBase &cycler)
Reads in the indicated CycleData object.
Definition bamReader.cxx:695
BamReader::get_factory
static WritableFactory * get_factory()
Returns the global WritableFactory for generating TypedWritable objects.
Definition bamReader.I:177
BamWriter::write_cdata
void write_cdata(Datagram &packet, const PipelineCyclerBase &cycler)
Writes out the indicated CycleData object.
Definition bamWriter.cxx:425
BamWriter::write_pointer
void write_pointer(Datagram &packet, const TypedWritable *dest)
The interface for writing a pointer to another object to a Bam file.
Definition bamWriter.cxx:317
CycleData
A single page of data maintained by a PipelineCycler.
Definition cycleData.h:50
DatagramIterator
A class to retrieve the individual data elements previously stored in a Datagram.
Definition datagramIterator.h:30
DatagramIterator::get_uint16
uint16_t get_uint16()
Extracts an unsigned 16-bit integer.
Definition datagramIterator.I:145
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_uint16
void add_uint16(uint16_t value)
Adds an unsigned 16-bit integer to the datagram.
Definition datagram.I:85
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
Thread::get_current_thread
get_current_thread
Returns a pointer to the currently-executing Thread object.
Definition thread.h:109
TransformTable
Stores the total set of VertexTransforms that the vertices in a particular GeomVertexData object migh...
Definition transformTable.h:38
TransformTable::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 transformTable.cxx:165
TransformTable::set_transform
set_transform
Replaces the nth transform.
Definition transformTable.h:63
TransformTable::complete_pointers
virtual int complete_pointers(TypedWritable **plist, BamReader *manager)
Receives an array of pointers, one for each time manager->read_pointer() was called in fillin().
Definition transformTable.cxx:183
TransformTable::remove_transform
remove_transform
Removes the nth transform.
Definition transformTable.h:63
TransformTable::add_transform
size_t add_transform(const VertexTransform *transform)
Adds a new transform to the table and returns the index number of the new transform.
Definition transformTable.cxx:103
TransformTable::register_with_read_factory
static void register_with_read_factory()
Tells the BamReader how to create objects of type TransformTable.
Definition transformTable.cxx:156
TransformTable::insert_transform
insert_transform
Inserts a new transform to the table at the given index position.
Definition transformTable.h:63
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
TypedWritable::fillin
virtual void fillin(DatagramIterator &scan, BamReader *manager)
This internal function is intended to be called by each class's make_from_bam() method to read in all...
Definition typedWritable.cxx:103
TypedWritable::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 typedWritable.cxx:54
TypedWritable::complete_pointers
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().
Definition typedWritable.cxx:81
VertexTransform
This is an abstract base class that holds a pointer to some transform, computed in some arbitrary way...
Definition vertexTransform.h:35
VertexTransform::get_next_modified
static UpdateSeq get_next_modified(Thread *current_thread)
Returns a monotonically increasing sequence.
Definition vertexTransform.cxx:97
transformTable.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.