Box2D: /build/box2d/src/box2d-2.4.1/include/box2d/b2_common.h Source File

| Box2D 2.4.1 A 2D physics engine for games

b2_common.h
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1 // MIT License
2
3 // Copyright (c) 2019 Erin Catto
4
5 // Permission is hereby granted, free of charge, to any person obtaining a copy
6 // of this software and associated documentation files (the "Software"), to deal
7 // in the Software without restriction, including without limitation the rights
8 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 // copies of the Software, and to permit persons to whom the Software is
10 // furnished to do so, subject to the following conditions:
11
12 // The above copyright notice and this permission notice shall be included in all
13 // copies or substantial portions of the Software.
14
15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 // SOFTWARE.
22
23 #ifndef B2_COMMON_H
24 #define B2_COMMON_H
25
26 #include "b2_settings.h"
27
28 #include <stddef.h>
29 #include <assert.h>
30 #include <float.h>
31
32 #if !defined(NDEBUG)
33 #define b2DEBUG
34 #endif
35
36 #define B2_NOT_USED(x) ((void)(x))
37 #define b2Assert(A) assert(A)
38
39 #define b2_maxFloat FLT_MAX
40 #define b2_epsilon FLT_EPSILON
41 #define b2_pi 3.14159265359f
42
46
47 // Collision
48
51 #define b2_maxManifoldPoints 2
52
56 #define b2_aabbExtension (0.1f * b2_lengthUnitsPerMeter)
57
61 #define b2_aabbMultiplier 4.0f
62
65 #define b2_linearSlop (0.005f * b2_lengthUnitsPerMeter)
66
69 #define b2_angularSlop (2.0f / 180.0f * b2_pi)
70
74 #define b2_polygonRadius (2.0f * b2_linearSlop)
75
77 #define b2_maxSubSteps 8
78
79
80 // Dynamics
81
83 #define b2_maxTOIContacts 32
84
87 #define b2_maxLinearCorrection (0.2f * b2_lengthUnitsPerMeter)
88
91 #define b2_maxAngularCorrection (8.0f / 180.0f * b2_pi)
92
95 #define b2_maxTranslation (2.0f * b2_lengthUnitsPerMeter)
96 #define b2_maxTranslationSquared (b2_maxTranslation * b2_maxTranslation)
97
100 #define b2_maxRotation (0.5f * b2_pi)
101 #define b2_maxRotationSquared (b2_maxRotation * b2_maxRotation)
102
106 #define b2_baumgarte 0.2f
107 #define b2_toiBaumgarte 0.75f
108
109
110 // Sleep
111
113 #define b2_timeToSleep 0.5f
114
116 #define b2_linearSleepTolerance (0.01f * b2_lengthUnitsPerMeter)
117
119 #define b2_angularSleepTolerance (2.0f / 180.0f * b2_pi)
120
122 void b2OpenDump(const char* fileName);
123 void b2Dump(const char* string, ...);
124 void b2CloseDump();
125
128 struct b2Version
129 {
130 int32 major;
131 int32 minor;
132 int32 revision;
133 };
134
136 extern B2_API b2Version b2_version;
137
138 #endif
b2_settings.h
b2Version::minor
int32 minor
incremental changes
Definition: b2_common.h:131
b2_version
B2_API b2Version b2_version
Current version.
b2Version::major
int32 major
significant changes
Definition: b2_common.h:130
b2Version
Definition: b2_common.h:129
b2OpenDump
void b2OpenDump(const char *fileName)
Dump to a file. Only one dump file allowed at a time.
b2Version::revision
int32 revision
bug fixes
Definition: b2_common.h:132