说明：  此处仅举出一个常规方法，即将超约束的数据约束到边界（当位置或者速度超出初始化限制时，将其拉回靠近的边界处）。当然，你不用担心他会停住不动，因为每个粒子还有惯性和其他两个参数的影响
(Only a general method is given here, that is, the data of the super constraint is constrained to the boundary (when the position or speed exceeds the initialization limit, pull it back to the close boundary). Of course, you don't have to worry about it stopping, because each particle has inertia and two other parameters.)