这是一个关于射线类碰撞的例子，是一个外国网站上搜到的，里面还运用了贴图动画，感觉不错，做射击类游戏是需要射线碰撞的!-This is a type of ray collisions example is a foreign websites found on the inside also use a map animation, it feels pretty good, so shooting game is needed ray collisions!