diff options
author | chai <chaifix@163.com> | 2020-09-10 20:30:31 +0800 |
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committer | chai <chaifix@163.com> | 2020-09-10 20:30:31 +0800 |
commit | 639b34294ffc20721c66db46e59e07d9100ac4b8 (patch) | |
tree | 7e1d45b536fa35e9f1559e468ea66fca99524573 /ThirdParty/Box2D/Common/b2Settings.h |
*init
Diffstat (limited to 'ThirdParty/Box2D/Common/b2Settings.h')
-rw-r--r-- | ThirdParty/Box2D/Common/b2Settings.h | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/ThirdParty/Box2D/Common/b2Settings.h b/ThirdParty/Box2D/Common/b2Settings.h new file mode 100644 index 0000000..c69280f --- /dev/null +++ b/ThirdParty/Box2D/Common/b2Settings.h @@ -0,0 +1,155 @@ +/* +* Copyright (c) 2006-2009 Erin Catto http://www.box2d.org +* +* This software is provided 'as-is', without any express or implied +* warranty. In no event will the authors be held liable for any damages +* arising from the use of this software. +* Permission is granted to anyone to use this software for any purpose, +* including commercial applications, and to alter it and redistribute it +* freely, subject to the following restrictions: +* 1. The origin of this software must not be misrepresented; you must not +* claim that you wrote the original software. If you use this software +* in a product, an acknowledgment in the product documentation would be +* appreciated but is not required. +* 2. Altered source versions must be plainly marked as such, and must not be +* misrepresented as being the original software. +* 3. This notice may not be removed or altered from any source distribution. +*/ + +#ifndef B2_SETTINGS_H +#define B2_SETTINGS_H + +#include <stddef.h> +#include <assert.h> +#include <float.h> + +#if !defined(NDEBUG) + #define b2DEBUG +#endif + +#define B2_NOT_USED(x) ((void)(x)) +#define b2Assert(A) assert(A) + +typedef signed char int8; +typedef signed short int16; +typedef signed int int32; +typedef unsigned char uint8; +typedef unsigned short uint16; +typedef unsigned int uint32; +typedef float float32; +typedef double float64; + +#define b2_maxFloat FLT_MAX +#define b2_epsilon FLT_EPSILON +#define b2_pi 3.14159265359f + +/// @file +/// Global tuning constants based on meters-kilograms-seconds (MKS) units. +/// + +// Collision + +/// The maximum number of contact points between two convex shapes. Do +/// not change this value. +#define b2_maxManifoldPoints 2 + +/// The maximum number of vertices on a convex polygon. You cannot increase +/// this too much because b2BlockAllocator has a maximum object size. +#define b2_maxPolygonVertices 8 + +/// This is used to fatten AABBs in the dynamic tree. This allows proxies +/// to move by a small amount without triggering a tree adjustment. +/// This is in meters. +#define b2_aabbExtension 0.1f + +/// This is used to fatten AABBs in the dynamic tree. This is used to predict +/// the future position based on the current displacement. +/// This is a dimensionless multiplier. +#define b2_aabbMultiplier 2.0f + +/// A small length used as a collision and constraint tolerance. Usually it is +/// chosen to be numerically significant, but visually insignificant. +#define b2_linearSlop 0.005f + +/// A small angle used as a collision and constraint tolerance. Usually it is +/// chosen to be numerically significant, but visually insignificant. +#define b2_angularSlop (2.0f / 180.0f * b2_pi) + +/// The radius of the polygon/edge shape skin. This should not be modified. Making +/// this smaller means polygons will have an insufficient buffer for continuous collision. +/// Making it larger may create artifacts for vertex collision. +#define b2_polygonRadius (2.0f * b2_linearSlop) + +/// Maximum number of sub-steps per contact in continuous physics simulation. +#define b2_maxSubSteps 8 + + +// Dynamics + +/// Maximum number of contacts to be handled to solve a TOI impact. +#define b2_maxTOIContacts 32 + +/// A velocity threshold for elastic collisions. Any collision with a relative linear +/// velocity below this threshold will be treated as inelastic. +#define b2_velocityThreshold 1.0f + +/// The maximum linear position correction used when solving constraints. This helps to +/// prevent overshoot. +#define b2_maxLinearCorrection 0.2f + +/// The maximum angular position correction used when solving constraints. This helps to +/// prevent overshoot. +#define b2_maxAngularCorrection (8.0f / 180.0f * b2_pi) + +/// The maximum linear velocity of a body. This limit is very large and is used +/// to prevent numerical problems. You shouldn't need to adjust this. +#define b2_maxTranslation 2.0f +#define b2_maxTranslationSquared (b2_maxTranslation * b2_maxTranslation) + +/// The maximum angular velocity of a body. This limit is very large and is used +/// to prevent numerical problems. You shouldn't need to adjust this. +#define b2_maxRotation (0.5f * b2_pi) +#define b2_maxRotationSquared (b2_maxRotation * b2_maxRotation) + +/// This scale factor controls how fast overlap is resolved. Ideally this would be 1 so +/// that overlap is removed in one time step. However using values close to 1 often lead +/// to overshoot. +#define b2_baumgarte 0.2f +#define b2_toiBaugarte 0.75f + + +// Sleep + +/// The time that a body must be still before it will go to sleep. +#define b2_timeToSleep 0.5f + +/// A body cannot sleep if its linear velocity is above this tolerance. +#define b2_linearSleepTolerance 0.01f + +/// A body cannot sleep if its angular velocity is above this tolerance. +#define b2_angularSleepTolerance (2.0f / 180.0f * b2_pi) + +// Memory Allocation + +/// Implement this function to use your own memory allocator. +void* b2Alloc(int32 size); + +/// If you implement b2Alloc, you should also implement this function. +void b2Free(void* mem); + +/// Logging function. +void b2Log(const char* string, ...); + +/// Version numbering scheme. +/// See http://en.wikipedia.org/wiki/Software_versioning +struct b2Version +{ + int32 major; ///< significant changes + int32 minor; ///< incremental changes + int32 revision; ///< bug fixes +}; + +/// Current version. +extern b2Version b2_version; + +#endif |