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);

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