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bulletMultiSphereShape.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 bulletMultiSphereShape.cxx
10 * @author enn0x
11 * @date 2012-01-05
12 */
13
15
16#include "bulletWorld.h"
17
18#include "geomVertexReader.h"
19
20TypeHandle BulletMultiSphereShape::_type_handle;
21
22/**
23 *
24 */
25BulletMultiSphereShape::
26BulletMultiSphereShape(const PTA_LVecBase3 &points, const PTA_stdfloat &radii) {
27
28 int num_spheres = std::min(points.size(), radii.size());
29
30 // Convert points
31 btVector3 *bt_points = new btVector3[num_spheres];
32 for (int i=0; i<num_spheres; i++) {
33 bt_points[i] = LVecBase3_to_btVector3(points[i]);
34 }
35
36 // Convert radii
37 btScalar *bt_radii = new btScalar[num_spheres];
38 for (int j=0; j<num_spheres; j++) {
39 bt_radii[j] = (PN_stdfloat)radii[j];
40 }
41
42 // Create shape
43 _shape = new btMultiSphereShape(bt_points, bt_radii, num_spheres);
44 _shape->setUserPointer(this);
45}
46
47/**
48 *
49 */
50BulletMultiSphereShape::
51BulletMultiSphereShape(const BulletMultiSphereShape &copy) {
52 LightMutexHolder holder(BulletWorld::get_global_lock());
53
54 _shape = copy._shape;
55}
56
57/**
58 *
59 */
60void BulletMultiSphereShape::
61operator = (const BulletMultiSphereShape &copy) {
62 LightMutexHolder holder(BulletWorld::get_global_lock());
63
64 _shape = copy._shape;
65}
66
67/**
68 *
69 */
70btCollisionShape *BulletMultiSphereShape::
71ptr() const {
72
73 return _shape;
74}
75
76/**
77 *
78 */
79int BulletMultiSphereShape::
80get_sphere_count() const {
81 LightMutexHolder holder(BulletWorld::get_global_lock());
82
83 return _shape->getSphereCount();
84}
85
86/**
87 *
88 */
89LPoint3 BulletMultiSphereShape::
90get_sphere_pos(int index) const {
91 LightMutexHolder holder(BulletWorld::get_global_lock());
92
93 nassertr(index >=0 && index <_shape->getSphereCount(), LPoint3::zero());
94 return btVector3_to_LPoint3(_shape->getSpherePosition(index));
95}
96
97/**
98 *
99 */
100PN_stdfloat BulletMultiSphereShape::
101get_sphere_radius(int index) const {
102 LightMutexHolder holder(BulletWorld::get_global_lock());
103
104 nassertr(index >=0 && index <_shape->getSphereCount(), 0.0);
105 return (PN_stdfloat)_shape->getSphereRadius(index);
106}
107
108/**
109 * Tells the BamReader how to create objects of type BulletShape.
110 */
113 BamReader::get_factory()->register_factory(get_class_type(), make_from_bam);
114}
115
116/**
117 * Writes the contents of this object to the datagram for shipping out to a
118 * Bam file.
119 */
121write_datagram(BamWriter *manager, Datagram &dg) {
122 BulletShape::write_datagram(manager, dg);
123 dg.add_stdfloat(get_margin());
124
125 // parameters to serialize: sphere count, points, radii
126 dg.add_int32(get_sphere_count());
127 for (int i = 0; i < get_sphere_count(); ++i){
128 get_sphere_pos(i).write_datagram(dg);
129 }
130
131 for (int i = 0; i < get_sphere_count(); ++i){
132 dg.add_stdfloat(get_sphere_radius(i));
133 }
134}
135
136/**
137 * This function is called by the BamReader's factory when a new object of
138 * type BulletShape is encountered in the Bam file. It should create the
139 * BulletShape and extract its information from the file.
140 */
141TypedWritable *BulletMultiSphereShape::
142make_from_bam(const FactoryParams &params) {
143 // create a default BulletMultiSphereShape
145 DatagramIterator scan;
146 BamReader *manager;
147
148 parse_params(params, scan, manager);
149 param->fillin(scan, manager);
150
151 return param;
152}
153
154/**
155 * This internal function is called by make_from_bam to read in all of the
156 * relevant data from the BamFile for the new BulletShape.
157 */
158void BulletMultiSphereShape::
159fillin(DatagramIterator &scan, BamReader *manager) {
160 BulletShape::fillin(scan, manager);
161 nassertv(_shape == nullptr);
162
163 PN_stdfloat margin = scan.get_stdfloat();
164
165 // parameters to serialize: sphere count, points, radii
166 int sphereCount = scan.get_int32();
167 btVector3 *positions = new btVector3[sphereCount];
168 for (int i = 0; i < sphereCount; ++i){
169 LVector3 pos;
170 pos.read_datagram(scan);
171 positions[i] = LVecBase3_to_btVector3(pos);
172 }
173
174 btScalar *radii = new btScalar[sphereCount];
175 for (int i = 0; i < sphereCount; ++i){
176 radii[i] = scan.get_stdfloat();
177 }
178
179 _shape = new btMultiSphereShape(positions, radii, sphereCount);
180 _shape->setUserPointer(this);
181 _shape->setMargin(margin);
182}
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.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
This is the fundamental interface for extracting binary objects from a Bam file, as generated by a Ba...
Definition bamReader.h:110
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
static void register_with_read_factory()
Tells the BamReader how to create objects of type BulletShape.
virtual void write_datagram(BamWriter *manager, Datagram &dg)
Writes the contents of this object to the datagram for shipping out to a Bam file.
A class to retrieve the individual data elements previously stored in a Datagram.
PN_stdfloat get_stdfloat()
Extracts either a 32-bit or a 64-bit floating-point number, according to Datagram::set_stdfloat_doubl...
int32_t get_int32()
Extracts a signed 32-bit integer.
An ordered list of data elements, formatted in memory for transmission over a socket or writing to a ...
Definition datagram.h:38
void add_int32(int32_t value)
Adds a signed 32-bit integer to the datagram.
Definition datagram.I:67
void add_stdfloat(PN_stdfloat value)
Adds either a 32-bit or a 64-bit floating-point number, according to set_stdfloat_double().
Definition datagram.I:133
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
Similar to MutexHolder, but for a light mutex.
TypeHandle is the identifier used to differentiate C++ class types.
Definition typeHandle.h:81
Base class for objects that can be written to and read from Bam files.
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...
virtual void write_datagram(BamWriter *manager, Datagram &dg)
Writes the contents of this object to the datagram for shipping out to a Bam file.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.