Unity 3D模型展示之生成标注
1.效果图
2.生成标注
标注生成要求：
1.指定元件生成标注。
2.生成标注出现位置可以设置。
根据标注生成的要求，可以在元件添加脚本时将这些信息读取并进行实现。控制标注生成在元件的位置，生成标注的距离。
-
创建标注预制体，分别在标注预制体中设置8个连接点
-
在MSwitchParts增加属性来保存标注出现位置信息，并提供方法进行信息的设置。
MSwitchParts中的代码片段
public MSwitchParts(int id, string partName, string objName, string details, string inFopostion = "Bottom0", float infoDis = 1, float infoAngle = 45, int pId = 0, List<int> pIds = null)
{
this.Id = id;
this.PartName = partName;
this.ObjName = objName;
this.Details = details;
this.PId = pId;
this.InFopostion = inFopostion;
this.InfoDis = infoDis;
this.InfoAngle = infoAngle;
this.pIds = pIds;
}
在SwitchOperation初始化数据，参数为连接点、距离、角度。
- 这里根据设置距离、角度，需要进行生成点位置的计算
public Vector3 GetEndPointByTrigonometric(float angle, Vector3 StartPoint, float distance)
{
Vector3 EndPoint = Vector3.zero;
//角度转弧度
var radian = (angle * Math.PI) / 180;
Debug.Log(Math.Cos(radian));
//计算新坐标 r 就是两者的距离
EndPoint.x = StartPoint.x + float.Parse((distance * Math.Cos(radian)).ToString());
EndPoint.y = StartPoint.y + float.Parse((distance * Math.Sin(radian)).ToString());
EndPoint.z = StartPoint.z;
return EndPoint;
}
- 已知起始坐标(元件的坐标)与计算出的终点坐标，需要画上一根线连接起来。新建MyLine脚本。
using UnityEngine;
[RequireComponent(typeof(LineRenderer))]
public class MyLine : MonoBehaviour
{
[SerializeField]
private Transform TransformA;
[SerializeField]
public Transform TransformB;
public LineRenderer LineRender;
[System.Obsolete]
void Start()
{
TransformA = this.transform;
LineRender = this.GetComponent<LineRenderer>();
if (LineRender != null)
{
LineRender.sharedMaterial = SwitchOperation.Instance.lineColormaterial;
LineRender.generateLightingData = true;
LineRender.SetWidth(0.008f, 0.008f);
//LineRender.enabled = false;
}
}
void Update()
{
if (LineRender && TransformB)
{
LineRender.SetPosition(0, TransformA.position);
LineRender.SetPosition(1, TransformB.position);
}
}
}
- 修改SwitchOperation脚本实现功能。主要代码。
//获取终点坐标
var objPointPostion = GetEndPointByTrigonometric(tempModel.InfoAngle, t.position, tempModel.InfoDis);
var infoRotation = t.rotation;
//生成标注
GameObject infoTemp = Instantiate(infoPrefabs, objPointPostion, infoRotation);
//生成标注 命名
infoTemp.name = "info" + t.name;
//infoTemp.tag = "Info";
var tempText = infoTemp.transform.Find("info").transform.Find("btnInfo").transform.Find("Text").GetComponent<Text>();
tempText.text = tempModel.PartName;
MyLine line = t.gameObject.AddComponent<MyLine>();
if (tempModel.InFopostion != "")
{
line.TransformB = infoTemp.transform.Find(tempModel.InFopostion).transform;
}
else
{
line.TransformB = infoTemp.transform;
}
- SwitchOperation完整代码
using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Serialization;
using UnityEngine.UI;
public class SwitchOperation : MonoBehaviour
{
public static SwitchOperation Instance;
private List<MSwitchParts> list = new List<MSwitchParts>();
[FormerlySerializedAs("infoPrefabs")]
[Tooltip("Prefab of the object. Prefab must have a infoPrefabs component. May be an empty game object or a full avatar.")]
public GameObject infoPrefabs;
public int currentIndex = 0;
public Material lineColormaterial;
private void Awake()
{
Instance = this;
}
// Start is called before the first frame update
void Start()
{
InitData();
}
public List<MSwitchParts> GetSwitchParts()
{
return list;
}
/// 3.效果展示
标注显示效果不理想。这时我们在添加一个脚本使得标注总是看向主摄像机。
添加脚本LookCamera。
using UnityEngine;
public class LookCamera : MonoBehaviour
{
Transform m_Camera;
public Camera myCamera;
void Start()
{
if (myCamera != null)
{
m_Camera = myCamera.transform;
}
else
{
m_Camera = Camera.main.transform;
}
}
// Update is called once per frame
void LateUpdate()
{
// 这里我的角色朝向和UI朝向是相反的，如果直接用LookAt()还需要把每个UI元素旋转过来。
// 为了简单，用了下面这个方法。它实际上是一个反向旋转，可以简单理解为“负负得正”吧
transform.rotation = Quaternion.LookRotation(transform.position - m_Camera.position);
}
}
最终效果