ContactFilter2D 接触筛选器的副本，已设置为不筛选任何 ContactPoint2D。
将接触筛选器设置为不筛选任何 ContactPoint2D。
When you are using a function that requires a ContactFilter2D, but you don't want to perform any filtering, then use this function to return a ContactFilter2D that turns off any filtering.
调用此函数，以便将接触筛选器设置为 layerMask = Physics2D.AllLayers、minDepth = Mathf.Infinity、maxDepth = Mathf.Infinity、minNormalAngle = Mathf.Infinity 和 maxNormalAngle = Mathf.Infinity。