Box2D  2.2.1
A 2D Physics Engine for Games
b2Settings.h
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00001 /*
00002 * Copyright (c) 2006-2009 Erin Catto http://www.box2d.org
00003 *
00004 * This software is provided 'as-is', without any express or implied
00005 * warranty.  In no event will the authors be held liable for any damages
00006 * arising from the use of this software.
00007 * Permission is granted to anyone to use this software for any purpose,
00008 * including commercial applications, and to alter it and redistribute it
00009 * freely, subject to the following restrictions:
00010 * 1. The origin of this software must not be misrepresented; you must not
00011 * claim that you wrote the original software. If you use this software
00012 * in a product, an acknowledgment in the product documentation would be
00013 * appreciated but is not required.
00014 * 2. Altered source versions must be plainly marked as such, and must not be
00015 * misrepresented as being the original software.
00016 * 3. This notice may not be removed or altered from any source distribution.
00017 */
00018 
00019 #ifndef B2_SETTINGS_H
00020 #define B2_SETTINGS_H
00021 
00022 #include <cassert>
00023 #include <cmath>
00024 
00025 #define B2_NOT_USED(x) ((void)(x))
00026 #define b2Assert(A) assert(A)
00027 
00028 typedef signed char     int8;
00029 typedef signed short int16;
00030 typedef signed int int32;
00031 typedef unsigned char uint8;
00032 typedef unsigned short uint16;
00033 typedef unsigned int uint32;
00034 typedef float float32;
00035 typedef double float64;
00036 
00037 #define b2_maxFloat             FLT_MAX
00038 #define b2_epsilon              FLT_EPSILON
00039 #define b2_pi                   3.14159265359f
00040 
00044 
00045 // Collision
00046 
00049 #define b2_maxManifoldPoints    2
00050 
00053 #define b2_maxPolygonVertices   8
00054 
00058 #define b2_aabbExtension                0.1f
00059 
00063 #define b2_aabbMultiplier               2.0f
00064 
00067 #define b2_linearSlop                   0.005f
00068 
00071 #define b2_angularSlop                  (2.0f / 180.0f * b2_pi)
00072 
00076 #define b2_polygonRadius                (2.0f * b2_linearSlop)
00077 
00079 #define b2_maxSubSteps                  8
00080 
00081 
00082 // Dynamics
00083 
00085 #define b2_maxTOIContacts                       32
00086 
00089 #define b2_velocityThreshold            1.0f
00090 
00093 #define b2_maxLinearCorrection          0.2f
00094 
00097 #define b2_maxAngularCorrection         (8.0f / 180.0f * b2_pi)
00098 
00101 #define b2_maxTranslation                       2.0f
00102 #define b2_maxTranslationSquared        (b2_maxTranslation * b2_maxTranslation)
00103 
00106 #define b2_maxRotation                          (0.5f * b2_pi)
00107 #define b2_maxRotationSquared           (b2_maxRotation * b2_maxRotation)
00108 
00112 #define b2_baumgarte                            0.2f
00113 #define b2_toiBaugarte                          0.75f
00114 
00115 
00116 // Sleep
00117 
00119 #define b2_timeToSleep                          0.5f
00120 
00122 #define b2_linearSleepTolerance         0.01f
00123 
00125 #define b2_angularSleepTolerance        (2.0f / 180.0f * b2_pi)
00126 
00127 // Memory Allocation
00128 
00130 void* b2Alloc(int32 size);
00131 
00133 void b2Free(void* mem);
00134 
00136 void b2Log(const char* string, ...);
00137 
00140 struct b2Version
00141 {
00142         int32 major;            
00143         int32 minor;            
00144         int32 revision;         
00145 };
00146 
00148 extern b2Version b2_version;
00149 
00150 #endif
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