简单相机自适应

/// <summary>
/// 相机自适应类
/// </summary>
public class CameraAuto : MonoBehaviour
{
    public float camInitSize;// 初始化视口大小
    public float screne_width;// 初始化宽
    public float screne_height;//初始化高
    private float auto_size;//实际视口大小
    private float auto_width;// 实际宽
    private float auto_height;//实际高 
    // Start is called before the first frame update
    void Start()
    {
        auto_width = Screen.width;
        auto_height = Screen.height;
        //正交相机自适应宽 公式：  实际视口 = 初始化视口大小 * 初始宽高比 / 实际宽高比
        auto_size = (camInitSize * (screne_width / screne_height)) / (auto_width / auto_height);
        GetComponent<Camera>().orthographicSize = auto_size;  
    } 
}