collision_sign_by = 1#标识为1 elif self.ball_y > self.brick_y + self.brick_wide: self.closestpoint_by = self.brick_y + self.brick_wide self.collision_sign_by = 2#标识为2 else: self.closestpoint_by = self.ball_y self.collision_sign_by = 3#标识为3 # 定义砖块到圆心最近点与圆心的距离（两点距离公式，根号下横纵坐标差的平方和） self.distanceb = math.sqrt( math.pow(self.closestpoint_bx - self.ball_x, 2) + math.pow(self.closestpoint_by - self.ball_y, 2)) # 球在砖块上左、上中、上右3种情况的碰撞检测 这个跟球在球拍的上左，上中，上右是一样的类似解析，这就不概述了 if self.distanceb < self.radius and self.collision_sign_by == 1 and ( self.collision_sign_bx == 1 or self.collision_sign_bx == 2): if self.collision_sign_bx == 1 and self.move_x > 0: self.move_x = - self.move_x self.move_y = - self.move_y if self.collision_sign_bx == 1 and self.move_x < 0: self.move_y = - self.move_y if self.collision_sign_bx == 2 and self.move_x < 0: self.move_x = - self.move_x self.move_y = - self.move_y if self.collision_sign_bx == 2 and self.move_x > 0: self.move_y = - self.move_y if self.distanceb < self.radius and self.collision_sign_by == 1 and self.collision_sign_bx == 3: self.move_y = - self.move_y # 球在砖块下左、下中、下右3种情况的碰撞检测 跟球在球拍的三个方向类似解析，不清楚可以看球在球拍的这三个方向解析 if self.distanceb < self.radius and self.collision_sign_by == 2 and ( self.collision_sign_bx == 1 or self.collision_sign_bx == 2): if self.collision_sign_bx == 1 and self.move_x > 0: self.move_x = - self.move_x self.move_y = - self.move_y if self.collision_sign_bx == 1 and self.move_x < 0: self.move_y = - self.move_y if self.collision_sign_bx == 2 and self.move_x < 0: self.move_x = - self.move_x self.move_y = - self.move_y if self.collision_sign_bx == 2 and self.move_x > 0: self.move_y = - self.move_y if self.distanceb < self.radius and self.collision_sign_by == 2 and self.collision_sign_bx == 3: self.move_y = - self.move_y # 球在砖块左、右两侧中间的碰撞检测 if self.distanceb < self.radius and self.collision_sign_by == 3: self.move_x = -