Introduction - If you have any usage issues, please Google them yourself
Android instantiate the object scope of the physical world, traversing Body, by world.getBodyCount () to get the number of loops through the Body, the proportion of final float RATE = 30 //screen to the real world 30px: 1m World world //declare a physical world objects AABB aabb //declare a range of physical world objects Vec2 gravity //declare a gravity vector objects float timeStep = 1f/60f //physical world simulation frequency int iterations = 10 //iteration values, The larger the more accurate simulation iterations, but the lower the performance