142 lines
5.1 KiB
C
142 lines
5.1 KiB
C
/*
|
|
* 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
|
|
|
|
#define B2_NOT_USED(x) ((void)(x))
|
|
#define b2Assert(A) jassert(A)
|
|
|
|
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(juce::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
|
|
{
|
|
juce::int32 major; ///< significant changes
|
|
juce::int32 minor; ///< incremental changes
|
|
juce::int32 revision; ///< bug fixes
|
|
};
|
|
|
|
/// Current version.
|
|
extern b2Version b2_version;
|
|
|
|
#endif
|