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Unity SKFramework框架(十九)、POI 兴趣点/信息点
2022-07-02 09:45:00 【CoderZ1010】
目录
一、简介
POI可以理解为场景中的一些有意义的点,例如车站、商场、医院、监控等等,该功能通常用于数字孪生项目,主要目的是将代表这些点位的二维图标与三维目标位置进行“绑定”,实质内容就是世界坐标转屏幕坐标。如下例所示,我们将一个监控点的图标与模型位置进行绑定:

该工具已经上传至我的框架SKFramework中的开发工具箱,如图所示。


框架已经在Github开源,地址:GitHub - 136512892/SKFramework: Unity SKFramework开发框架

二、使用说明
1.二维与三维的匹配
通过Match函数将POI图标与三维目标进行匹配,其中flag参数表示匹配的标识符,系统会将标识符相同的RectTransform与GameObject进行匹配。
/// <summary>
/// 根据标识符进行匹配
/// </summary>
/// <param name="flag">标识符</param>
/// <param name="rectTransform">RectTransform组件</param>
public void Match(string flag, RectTransform rectTransform);
/// <summary>
/// 根据标识符进行匹配
/// </summary>
/// <param name="flag">标识符</param>
/// <param name="target">三维目标</param>
public void Match(string flag, GameObject target);2.移除
通过Delete函数移除一个POI点,移除后将不再进行世界坐标转屏幕坐标的计算。
/// <summary>
/// 根据标识符移除
/// </summary>
/// <param name="flag">标识符</param>
/// <returns>移除成功返回true 否则返回false</returns>
public bool Delete(string flag);3.UI分辨率
代码中默认认为UI使用的分辨率为1920*1080,需要根据实际进行更改

4.Camera相机
世界坐标与屏幕坐标的转换是通过Camera类中的WorldToScreenPoint函数实现的,因此系统中需要一个Camera主相机,系统初始化时会首先获取场景中Tag标签为MainCamera的相机,如果不存在再通过FindObjectOfType函数查找相机。

三、Example 示例
using UnityEngine;
using SK.Framework;
public class Example : MonoBehaviour
{
[SerializeField] private RectTransform rt;
[SerializeField] private GameObject target;
private void Start()
{
POI.Match("监控1", rt);
POI.Match("监控1", target);
}
}
运行后如图所示:

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