摄像机的视野（以度为单位）。
此为垂直视野；水平
FOV 随视口宽高比的变化而改变。
如果是正交摄像机，则忽略视野（请参阅 orthographic）。
某些 VR SDK 具有用于 VR 摄像机的固定视野值。使用这些 SDK 启用 VR 时，该属性将始终返回来自 SDK 的值。如果您尝试设置该属性，则会在记录中看到一条警告，并且该值会被忽略。
另请参阅：摄像机组件。
//Attach this script to an empty GameObject.
//This script creates a Slider that allows you to manipulate the Camera's field of view. Place GameObjects in the Scene to show the full effect.
using UnityEngine;
public class CameraFieldOfViewExample : MonoBehaviour
{
//This is the field of view that the Camera has
float m_FieldOfView;
void Start()
{
//Start the Camera field of view at 60
m_FieldOfView = 60.0f;
}
void Update()
{
//Update the camera's field of view to be the variable returning from the Slider
Camera.main.fieldOfView = m_FieldOfView;
}
void OnGUI()
{
//Set up the maximum and minimum values the Slider can return (you can change these)
float max, min;
max = 150.0f;
min = 20.0f;
//This Slider changes the field of view of the Camera between the minimum and maximum values
m_FieldOfView = GUI.HorizontalSlider(new Rect(20, 20, 100, 40), m_FieldOfView, min, max);
}
}