released December 13, 2019

Box2D不是一种计算机编程语言，不需要又从变量啊、数据类型啊一大堆让人头痛的基础知识学起；也不是一种游戏编程软件，不需要复杂的安装与配置。它是一个强大的开源物理游戏引擎，用来模拟2D刚体物体运动和碰撞，由Erin Catto早在2007年用C++语言开发。
Box2D集成了大量的物理力学和运动学的计算，并将物理模拟过程封装到类对象中，将对物体的操作，以简单友好的接口提供给开发者。我们只需要调用引擎中相应的对象或函数，就可以模拟现实生活中的加速、减速、抛物线运动、万有引力、碰撞反弹等等各种真实的物理运动。

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