unity中摄像机跟随主角，摄像机穿墙，射线碰撞检测，摄像机穿墙跟随

这个问题，摄像机拍摄主角，当主角被墙遮蔽了视野，那么就用正上方的点和当前相机所在位置的店为起始点和终点，从二者之间再找出三个关键点进行射线检测，能看到主角的店即可作为摄像机的transform.position

Vector3[] posArray;Vector3 beginPos = player.transform.position + offset;Vector3 endPos = player.transform.position + offset.magnitude * Vector3.up;for (int i=0; i<5; i++) {Vector3 tmp = beginPos + (endPos - beginPos) / 4 * i;RaycastHit hitInfo;if (Physics.Raycast (tmp, player.transform.position - tmp, out hitInfo)) {if (hitInfo.collider.tag != Tags.Player) {continue;} else {transform.position = tmp;break;}}}transform.LookAt (player.transform.position);