summaryrefslogtreecommitdiff
path: root/ThirdParty/Box2D/Common/b2Settings.h
diff options
context:
space:
mode:
authorchai <chaifix@163.com>2020-09-10 20:30:31 +0800
committerchai <chaifix@163.com>2020-09-10 20:30:31 +0800
commit639b34294ffc20721c66db46e59e07d9100ac4b8 (patch)
tree7e1d45b536fa35e9f1559e468ea66fca99524573 /ThirdParty/Box2D/Common/b2Settings.h
*init
Diffstat (limited to 'ThirdParty/Box2D/Common/b2Settings.h')
-rw-r--r--ThirdParty/Box2D/Common/b2Settings.h155
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