Canvas大小

https://www.youtube.com/watch?v=OKK69bmjmJE&ab_channel=Creagines

Canvas Scaler-> 缩放模式 -> 屏幕大小缩放

解决了上次文字飞掉的问题

可以下一步啦

点击按钮

https://www.cnblogs.com/Peng18233754457/p/7792442.html

一开始事件用的是Button的onClick()

发现Event System更好用

Button上鼠标单击()里+ （其它事件可以添加组件触发）
EventTest.cs中 public void A()

Button这样就可以了

3D物体要使用，还要先给Main Camera加一个Physics Raycaster组件

点击寻路

Player监听点击实现，更改寻路

https://www.youtube.com/watch?v=wlo-ZvV3ovg&ab_channel=JasonWeimann

参考↑通过Action实现，避免到处reference

寻路转向

寻路完成后转向board

设置了一个isNavigating变量，记录状态

到达后用DOTWeen转向

寻路打断

每次有输入时，打断寻路，同时将设置成false

一个小问题是，第一次点击board时将isNavigating设成true，但同时Input.GetMouseButtonUp(0)也会为true，所以额外用了一个firstClick判断是否为第一次点击

最后相关代码：

private bool isNavigating = false;
private bool firstClick = true;
private Vector3 turnPosition;

void Update()
{
  if(Input.GetMouseButtonUp(0)){
    if(isNavigating){
      if(firstClick){
        firstClick = false;
      }else{
        isNavigating = false;
      }
    }else{
      firstClick = true; 
      // 这里可能有点点问题，isNavigating设成false之后，要下一次Update才能检测到，但是Update调得很快，基本感觉不到，所以暂时就这样写了，看着舒服些。但MARK一下，以后如果有问题，再把这里拆出去单独判断。
    }

		// ...

  }else if(Input.GetMouseButton(0)){
    isNavigating = false;

   // ...

  }else if(Input.GetAxis("Mouse ScrollWheel")!=0 || Input.GetAxis("Horizontal")!=0 || Input.GetAxis("Vertical")!=0){
    isNavigating = false;

    // ...
    }
  }
}

private void SetNewDestination(Vector3 destination, Vector3 boardPosition) {
  // set new destination
  agent.SetDestination(destination);

  // set turn destination
  turnPosition = boardPosition;
  isNavigating = true;
}

02.19 update

后续做导游时发现，点击UI寻路按钮时，事件发生的顺序是：

GetMouseButton
Set Destination
GetMouseButtonUp

而再次GetMouseButton和GetMouseButtonUp都需要打断，用之前的方法很混乱

于是改成三种状态，只能按顺序切换

GuideStatus.Static 默认状态
GuideStatus.Ready 设置寻路后，Static->Ready
GuideStatus.On
- Ready状态获取到一次GetMouseButtonUp，变成On
- On状态时，GetMouseButton或GetMouseButtonUp均会打断寻路，变成Static
- On状态到达目的地后，变成Static

测试目前没什么问题

private Vector3 turnPosition;
private GuideStatus currentGuideStatus = GuideStatus.Static;
private enum GuideStatus
{
  Static,
  Ready,
  On
}

void Update()
{
  if(Input.GetMouseButtonUp(0)){
    // if is click
    if(mouseDownCount < 2){
      if(currentGuideStatus == GuideStatus.Ready){
        currentGuideStatus = GuideStatus.On;
      }else if(currentGuideStatus == GuideStatus.On){
        currentGuideStatus = GuideStatus.Static;
        Debug.Log("[guide] disrupted by GetMouseButtonUp-Click");
      }

      // ...
    mouseDownCount = 0;

  }else if(Input.GetMouseButton(0)){
    if(currentGuideStatus==GuideStatus.On){
      currentGuideStatus = GuideStatus.Static;
      Debug.Log("[guide] disrupted by GetMouseButton");
    }

    // ...

    mouseDownCount++;

  }else if(Input.GetAxis("Mouse ScrollWheel")!=0 || Input.GetAxis("Horizontal")!=0 || Input.GetAxis("Vertical")!=0){
      if(currentGuideStatus==GuideStatus.On){
        currentGuideStatus = GuideStatus.Static;
        Debug.Log("[guide] disrupted by Movement");
      }
      
      // ...
    
  }else{
    if(currentGuideStatus==GuideStatus.On && agent.remainingDistance==0){
      Debug.Log("[guide] look at "+turnPosition);
      transform.DOLookAt(turnPosition,turnDuration,AxisConstraint.Y);
      currentGuideStatus = GuideStatus.Static;
      Debug.Log("[guide] end");
    }
  }
}

private void SetNewDestination(Vector3 destination, Vector3 destination2) {
  Debug.Log("[guide] start");
  currentGuideStatus = GuideStatus.Ready;

  // set new destination
  agent.SetDestination(destination);

  // set turn destination
  turnPosition = destination2;
}

UI遮盖Raycast

加完导航寻路的UI之后，发现raycast仍可以穿透UI，同时点击寻路

看到一种解决是用EventSystem.current.IsPointerOverGameObject()

但是Canvas是全屏大小，点击哪里都是true

Canvas Group也没有用

https://stackoverflow.com/questions/52654002/unity-not-ignoring-button-click-in-ignore-raycast-layer

最后参考这个

https://gameinstitute.qq.com/community/detail/129017

给所有的Button加了tag来判断

private bool IsPointerOverUIObject(){
    // get mouse position
    PointerEventData eventDataCurrentPosition = new PointerEventData(EventSystem.current);
    eventDataCurrentPosition.position = new Vector2(Input.mousePosition.x, Input.mousePosition.y);

    // get all raycast result
    List<RaycastResult> results = new List<RaycastResult>();
    EventSystem.current.RaycastAll(eventDataCurrentPosition, results);
    
    // check UI tag
    foreach(RaycastResult r in results){
        if(r.gameObject.tag == "UI"){
            return true;
        }
    }
    return false;
}

脚本执行顺序问题

做了导航栏之后，发现初始化顺序有点问题

导航栏要使用Board上的数字和名字，有时会为默认值

选中任意一个script，调整Inspector->Execution Order，解决