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| build/ | ||
| imgui.ini | ||
| settings.ini | ||
| .vscode/ | ||
| CMakeSettings.json | ||
| out/ | ||
| .vs/ |
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| ### Version 2.3.0 | ||
| - Polygon creation now computes the convex hull. Vertices no longer need to be ordered. | ||
| - The convex hull code will merge vertices closer than dm_linearSlop. This may lead to failure on very small polygons. | ||
| - Added b2MotorJoint. | ||
| - Bug fixes. |
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| MIT License | ||
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| Copyright (c) 2019 Erin Catto | ||
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| Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| of this software and associated documentation files (the "Software"), to deal | ||
| in the Software without restriction, including without limitation the rights | ||
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| copies of the Software, and to permit persons to whom the Software is | ||
| furnished to do so, subject to the following conditions: | ||
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| The above copyright notice and this permission notice shall be included in all | ||
| copies or substantial portions of the Software. | ||
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| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| SOFTWARE. |
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|  | ||
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| # Build Status | ||
| [](https://travis-ci.org/erincatto/box2d) | ||
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| # Box2D | ||
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| Box2D is a 2D physics engine for games. | ||
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| ## Contributing | ||
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| Please do not submit pull requests with new features or core library changes. Instead, please file an issue first for discussion. For bugs, I prefer detailed bug reports over pull requests. | ||
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| ## Features | ||
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| ### Collision | ||
| - Continuous collision detection | ||
| - Contact callbacks: begin, end, pre-solve, post-solve | ||
| - Convex polygons and circles | ||
| - Multiple shapes per body | ||
| - One-shot contact manifolds | ||
| - Dynamic tree broadphase | ||
| - Efficient pair management | ||
| - Fast broadphase AABB queries | ||
| - Collision groups and categories | ||
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| ### Physics | ||
| - Continuous physics with time of impact solver | ||
| - Persistent body-joint-contact graph | ||
| - Island solution and sleep management | ||
| - Contact, friction, and restitution | ||
| - Stable stacking with a linear-time solver | ||
| - Revolute, prismatic, distance, pulley, gear, mouse joint, and other joint types | ||
| - Joint limits, motors, and friction | ||
| - Momentum decoupled position correction | ||
| - Fairly accurate reaction forces/impulses | ||
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| ### System | ||
| - Small block and stack allocators | ||
| - Centralized tuning parameters | ||
| - Highly portable C++ with no use of STL containers | ||
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| ### Testbed | ||
| - OpenGL with GLFW | ||
| - Graphical user interface with imgui | ||
| - Extensible test framework | ||
| - Support for loading world dumps | ||
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| ## Building | ||
| - Install [CMake](https://cmake.org/) | ||
| - Ensure CMake is in the user `PATH` | ||
| - Visual Studio: run `build.bat` from the command prompt | ||
| - Otherwise: run `build.sh` from a bash shell | ||
| - Results are in the build sub-folder | ||
| - On Windows you can open box2d.sln | ||
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| ## Building Box2D - Using vcpkg | ||
| You can download and install Box2D using the [vcpkg](https://github.com/Microsoft/vcpkg) dependency manager: | ||
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| - git clone https://github.com/Microsoft/vcpkg.git | ||
| - cd vcpkg | ||
| - ./bootstrap-vcpkg.sh | ||
| - ./vcpkg integrate install | ||
| - ./vcpkg install box2d | ||
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| The Box2D port in vcpkg is kept up to date by Microsoft team members and community contributors. If the version is out of date, please [create an issue or pull request](https://github.com/Microsoft/vcpkg) on the vcpkg repository. | ||
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| Note: vcpkg support is not provided by the Box2D project | ||
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| ## Building for Xcode | ||
| - Install [CMake](https://cmake.org) | ||
| - Add Cmake to the path in .zprofile (the default Terminal shell is zsh) | ||
| - export PATH="/Applications/CMake.app/Contents/bin:$PATH" | ||
| - mkdir build | ||
| - cd build | ||
| - cmake -G Xcode .. | ||
| - open box2d.xcodeproj | ||
| - Select the testbed scheme | ||
| - Edit the scheme to set a custom working directory, make this be in box2d/testbed | ||
| - You can now build and run the testbed | ||
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| ## Documentation | ||
| - [Manual](https://box2d.org/documentation/) | ||
| - [reddit](https://www.reddit.com/r/box2d/) | ||
| - [Discord](https://discord.gg/NKYgCBP) | ||
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| ## License | ||
| Box2D is developed by Erin Catto, and uses the [MIT license](https://en.wikipedia.org/wiki/MIT_License). | ||
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| ## Sponsorship | ||
| Support development of Box2D through [Github Sponsors](https://github.com/sponsors/erincatto) |
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| // MIT License | ||
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| // Copyright (c) 2019 Erin Catto | ||
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| // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| // of this software and associated documentation files (the "Software"), to deal | ||
| // in the Software without restriction, including without limitation the rights | ||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| // copies of the Software, and to permit persons to whom the Software is | ||
| // furnished to do so, subject to the following conditions: | ||
|
|
||
| // The above copyright notice and this permission notice shall be included in all | ||
| // copies or substantial portions of the Software. | ||
|
|
||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| // SOFTWARE. | ||
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| #ifndef B2_BLOCK_ALLOCATOR_H | ||
| #define B2_BLOCK_ALLOCATOR_H | ||
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| #include "box2d/b2_settings.h" | ||
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| const int32 b2_blockSizeCount = 14; | ||
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| struct b2Block; | ||
| struct b2Chunk; | ||
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| /// This is a small object allocator used for allocating small | ||
| /// objects that persist for more than one time step. | ||
| /// See: http://www.codeproject.com/useritems/Small_Block_Allocator.asp | ||
| class b2BlockAllocator | ||
| { | ||
| public: | ||
| b2BlockAllocator(); | ||
| ~b2BlockAllocator(); | ||
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| /// Allocate memory. This will use b2Alloc if the size is larger than b2_maxBlockSize. | ||
| void* Allocate(int32 size); | ||
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| /// Free memory. This will use b2Free if the size is larger than b2_maxBlockSize. | ||
| void Free(void* p, int32 size); | ||
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| void Clear(); | ||
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| private: | ||
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| b2Chunk* m_chunks; | ||
| int32 m_chunkCount; | ||
| int32 m_chunkSpace; | ||
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| b2Block* m_freeLists[b2_blockSizeCount]; | ||
| }; | ||
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| #endif |
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