【Unity,C#】控制方向光模拟昼夜变化的脚本

【Unity,C#】控制方向光模拟昼夜变化的脚本

Unity.C#.模拟昼夜变化的脚本

效果

如何实现

创建TextPro用于实时显示时间

简单配置

创建空对象

加入脚本

脚本代码

using System;using TMPro;using UnityEngine;public class TimeController : MonoBehaviour{ ///

/// 显示24小时制时间 ///

[SerializeField] private TextMeshProUGUI txtTime; ///

/// 定向光 ///

[SerializeField] private Light sunLight; ///

/// 时间的增长步长 ///

[SerializeField] private float timeStep = 1000; ///

/// 起始小时 ///

[SerializeField] private int startHour = 12; ///

/// 日升小时 ///

[SerializeField] private int sunriseHour = 6; ///

/// 日落小时 ///

[SerializeField] private int sunsetHour = 18; private DateTime currentTime; private TimeSpan sunriseTime; private TimeSpan sunsetTime; void Start() { currentTime = DateTime.Now.Date + TimeSpan.FromHours(startHour); sunriseTime = TimeSpan.FromHours(sunriseHour); sunsetTime = TimeSpan.FromHours(sunsetHour); } void Update() { updateTime(); updateDirectionLight(); } ///

/// 更新光照角度 ///

private void updateDirectionLight() { float lightDegree = 0f; if (currentTime.TimeOfDay > sunriseTime && currentTime.TimeOfDay < sunsetTime)//白天 { TimeSpan sunrise2SunsetInterval = getTimeInterval(sunriseTime, sunsetTime); TimeSpan sunrise2CurrentInterval = getTimeInterval(sunriseTime, currentTime.TimeOfDay); //算出比率:当前时间差和总时间 double percentage = sunrise2CurrentInterval.TotalMilliseconds / sunrise2SunsetInterval.TotalMilliseconds; lightDegree = Mathf.Lerp(0, 180, (float)percentage); } else//夜晚 { TimeSpan sunset2SunriseInterval = getTimeInterval(sunsetTime, sunriseTime); TimeSpan sunset2CurrentInterval = getTimeInterval(sunsetTime, currentTime.TimeOfDay); //算出比率:当前时间差和总时间 double percentage = sunset2CurrentInterval.TotalMilliseconds / sunset2SunriseInterval.TotalMilliseconds; lightDegree = Mathf.Lerp(180, 360, (float)percentage); } //根据当前时间, 将表示日光的定向光旋转到对应的角度,围绕X轴旋转 sunLight.transform.rotation = Quaternion.AngleAxis(lightDegree, Vector3.right); } ///

/// 计算时间差 ///

/// /// /// private TimeSpan getTimeInterval(TimeSpan firstTime, TimeSpan secondTime) { TimeSpan interval = secondTime - firstTime; if (interval.TotalSeconds < 0) { interval += TimeSpan.FromHours(24); } return interval; } ///

/// 更新时间 ///

private void updateTime() { currentTime = currentTime.AddSeconds(Time.deltaTime * timeStep); if (txtTime != null) { txtTime.text = currentTime.ToString("HH:mm"); } }}

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