/// <summary>
/// 设置相机的参数看向目标包围盒
/// </summary>
public void SetCameraLookToTarget()
{
//相机旋转朝向目标对象
Bounds bounds = targetRenderer.bounds;
Vector3 boundsCenter = bounds.center;
targetCamera.transform.LookAt(boundsCenter);
//包围盒角点
Vector3[] points = FuncUtil.GetBoundsCorners(boundsCenter, bounds.extents);
//所有角点投射到平面
Vector3 planeNormal = boundsCenter - targetCamera.transform.position;
FuncUtil.WorldPointsToPlane(points, points.Length, planeNormal);
//平面中心
Vector3 planeCenter = Vector3.ProjectOnPlane(boundsCenter, planeNormal);
//取平面上各个点与平面中心的最大距离作为相机的视野矩形框大小
float halfHeight = GetMaxDistanceToPlaneCenter(points, points.Length, planeCenter);
//相机与包围盒中心的距离(世界坐标为单位)
float distance = Vector3.Distance(boundsCenter, targetCamera.transform.position);
//得到视野大小
targetCamera.fieldOfView = Mathf.Atan2(halfHeight, distance) * Mathf.Rad2Deg * 2;
}