【unity小技巧】unity3d环境带雾的昼夜系统变化

public class DayAndNight : MonoBehaviour
{
    [Header("雾的颜色渐变")]
    [SerializeField] private Gradient fogGradient;
    [Header("环境光颜色渐变")]
    [SerializeField] private Gradient ambientGradient; 
    [Header("太阳光颜色渐变")]
    [SerializeField] private Gradient directionLightGradient;
    [Header("天空盒色调渐变")]
    [SerializeField] private Gradient skyboxTintGradient; 

    [Header("方向光源")]
    [SerializeField] private Light directionalLight;
    [Header("天空盒材质")]
    [SerializeField] private Material skyboxMaterial;

    [Header("白天持续时间（秒）")]
    [SerializeField] private float dayDurationInSeconds = 60f; 
    [Header("天空盒旋转速度")]
    [SerializeField] private float rotationSpeed = 1f;

    private float currentTime = 0;  // 当前时间（0-1）

    private void Update()
    {
        UpdateTime();
        UpdateDayNightCycle();
        RotateSkybox();
    }

    // 更新当前时间
    private void UpdateTime()
    {
        currentTime += Time.deltaTime / dayDurationInSeconds;
        currentTime = Mathf.Repeat(currentTime, 1f);
    }

    // 更新白天黑夜循环效果
    private void UpdateDayNightCycle()
    {
        // 计算太阳的位置
        float sunPosition = Mathf.Repeat(currentTime + 0.25f, 1f);
        directionalLight.transform.rotation = Quaternion.Euler(sunPosition * 360f, 0f, 0f);

        // 更新雾、环境光、太阳光和天空盒的颜色
        RenderSettings.fogColor = fogGradient.Evaluate(currentTime);
        RenderSettings.ambientLight = ambientGradient.Evaluate(currentTime);
        directionalLight.color = directionLightGradient.Evaluate(currentTime);
        skyboxMaterial.SetColor("_Tint", skyboxTintGradient.Evaluate(currentTime));
    }

    // 旋转天空盒
    private void RotateSkybox()
    {
        float currentRotation = skyboxMaterial.GetFloat("_Rotation");
        float newRotation = currentRotation + rotationSpeed * Time.deltaTime;
        newRotation = Mathf.Repeat(newRotation, 360f);
        skyboxMaterial.SetFloat("_Rotation", newRotation);
    }

    // 在应用程序退出时重置天空盒颜色
    private void OnApplicationQuit()
    {
        skyboxMaterial.SetColor("_Tint", new Color(0.5f, 0.5f, 0.5f));
    }
}