unity3d - raycasting world space UI

Question

I need some help with raycasting UI with Daydream. As there are only a demo for gameObjects (cubes), I want to know I can handle UI elements. The UI elements should react as usual, I mean highlighted and so on. The posts in How to use Graphic Raycaster with WorldSpace UI? were helpful, but completely.

I used DrawRay to see where my pointer is actually going through and it works good. But no log message is created.

 void Update()
  {
      Quaternion ori = GvrController.Orientation;
      Vector3 vector = ori * Vector3.forward;
      Debug.DrawRay(transform.position, vector * 100000, Color.green);
      PointerEventData pointerData = new PointerEventData(null);
      pointerData.position = vector;
      Debug.Log(vector);
      List<RaycastResult> results = new List<RaycastResult>();
      EventSystem.current.RaycastAll(pointerData, results);
      if (results.Count > 0)
      {
          Debug.Log(results[0]);
      }
  }

Canvas (World Space) and Button is created as useal and not modified.

Answer 1

In your case I see two problems :

• I think you should use PointerEventData pointerData = new PointerEventData(EventSystem.current); insted of PointerEventData pointerData = new PointerEventData(null);
• Also PointerEventData.position is a Vector2 and not a Vector3 : you should try pointerData.position = new Vector2(Screen.width * 0.5f, Screen.height * 0.5f);

As a side note you can use graphicRaycaster.Raycast(pointerData, results); where graphicRaycaster is public and you assign it the GraphicRaycaster component of you Canvas .

Answer 2

这个有用的方法怎么样：

Vector3 CurrentRaycastResultWorldPosition = GvrPointerInputModule.Pointer.CurrentRaycastResult.worldPosition;         

Answer 3

根据您的问题 raycasting world space UI，如果您使用的是 google cardbard 或 daydream，那么您应该尝试将脚本 gvrgraphicphysics raycaster 附加到 UI 画布。