Box2D 2.3.0 A 2D Physics Engine for Games

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b2Settings.h
Go to the documentation of this file.
1 /*
2 * Copyright (c) 2006-2009 Erin Catto http://www.box2d.org
3 *
4 * This software is provided 'as-is', without any express or implied
5 * warranty. In no event will the authors be held liable for any damages
6 * arising from the use of this software.
7 * Permission is granted to anyone to use this software for any purpose,
8 * including commercial applications, and to alter it and redistribute it
9 * freely, subject to the following restrictions:
10 * 1. The origin of this software must not be misrepresented; you must not
11 * claim that you wrote the original software. If you use this software
12 * in a product, an acknowledgment in the product documentation would be
13 * appreciated but is not required.
14 * 2. Altered source versions must be plainly marked as such, and must not be
15 * misrepresented as being the original software.
16 * 3. This notice may not be removed or altered from any source distribution.
17 */
18
19 #ifndef B2_SETTINGS_H
20 #define B2_SETTINGS_H
21
22 #include <stddef.h>
23 #include <assert.h>
24 #include <float.h>
25
26 #define B2_NOT_USED(x) ((void)(x))
27 #define b2Assert(A) assert(A)
28
29 typedef signed char int8;
30 typedef signed short int16;
31 typedef signed int int32;
32 typedef unsigned char uint8;
33 typedef unsigned short uint16;
34 typedef unsigned int uint32;
35 typedef float float32;
36 typedef double float64;
37
38 #define b2_maxFloat FLT_MAX
39 #define b2_epsilon FLT_EPSILON
40 #define b2_pi 3.14159265359f
41
45
46 // Collision
47
50 #define b2_maxManifoldPoints 2
51
54 #define b2_maxPolygonVertices 8
55
59 #define b2_aabbExtension 0.1f
60
64 #define b2_aabbMultiplier 2.0f
65
68 #define b2_linearSlop 0.005f
69
72 #define b2_angularSlop (2.0f / 180.0f * b2_pi)
73
77 #define b2_polygonRadius (2.0f * b2_linearSlop)
78
80 #define b2_maxSubSteps 8
81
82
83 // Dynamics
84
86 #define b2_maxTOIContacts 32
87
90 #define b2_velocityThreshold 1.0f
91
94 #define b2_maxLinearCorrection 0.2f
95
98 #define b2_maxAngularCorrection (8.0f / 180.0f * b2_pi)
99
102 #define b2_maxTranslation 2.0f
103 #define b2_maxTranslationSquared (b2_maxTranslation * b2_maxTranslation)
104
107 #define b2_maxRotation (0.5f * b2_pi)
108 #define b2_maxRotationSquared (b2_maxRotation * b2_maxRotation)
109
113 #define b2_baumgarte 0.2f
114 #define b2_toiBaugarte 0.75f
115
116
117 // Sleep
118
120 #define b2_timeToSleep 0.5f
121
123 #define b2_linearSleepTolerance 0.01f
124
126 #define b2_angularSleepTolerance (2.0f / 180.0f * b2_pi)
127
128 // Memory Allocation
129
131 void* b2Alloc(int32 size);
132
134 void b2Free(void* mem);
135
137 void b2Log(const char* string, ...);
138
141 struct b2Version
142 {
143 int32 major;
144 int32 minor;
145 int32 revision;
146 };
147
149 extern b2Version b2_version;
150
151 #endif
b2Log
void b2Log(const char *string,...)
Logging function.
Definition: b2Settings.cpp:38
b2Version::minor
int32 minor
incremental changes
Definition: b2Settings.h:144
b2Free
void b2Free(void *mem)
If you implement b2Alloc, you should also implement this function.
Definition: b2Settings.cpp:32
b2Alloc
void * b2Alloc(int32 size)
Implement this function to use your own memory allocator.
Definition: b2Settings.cpp:27
b2_version
b2Version b2_version
Current version.
Definition: b2Settings.cpp:24
b2Version
Definition: b2Settings.h:141
b2Version::major
int32 major
significant changes
Definition: b2Settings.h:143
b2Version::revision
int32 revision
bug fixes
Definition: b2Settings.h:145