Is OnTriggerEnter with ScreenPointToRay completely broken?

Unity Engine
1

Object 1: Mesh Sphere with a Sphere Collider set to Trigger
Contains script:

	void OnTriggerEnter()
	{
		Debug.Log("Do Something");
	}
	
	void OnTriggerExit()
	{
		Debug.Log("Do Something Else");
	}

Object 2: Camera
Contains script:

	void Update()	
	{
		RaycastHit hitObj;
		Ray ayanami = Camera.main.ScreenPointToRay(Input.mousePosition);
		bool didHit = Physics.Raycast(ayanami, out hitObj);
		if(didHit)
		{
			Debug.Log("I hit: " + hitObj.collider.gameObject.name);
		}	
	}

This is the simplest implementation possible but I’m getting nothing back from the sphere collider. Is there some ongoing bug with OnTriggerEnter or am I completely using this wrong?

2

OnTriggerEnter won’t execute if a Ray touches the sphere. If you need that behaviour, you could do this:

    void OnRayHit(Vector3 point)
    {
        Debug.Log("I was hit by a ray at: "+point);
    }

void Update()
    {
        RaycastHit hitInfo;
        Ray cameraRay = Camera.main.ScreenPointToRay(Input.mousePosition);

        if(Physics.Raycast(cameraRay , out hitInfo))
        {
            Debug.Log("I hit: " + hitInfo.collider.gameObject.name);
            hitInfo.collider.gameObject.SendMessage("OnRayHit", hitInfo.point);
        }
    }

Also, a Ray stops when it hits something, so you can’t get information on where it would have come out, at least not as easily.

3

That’s ultimately what I need though. Its a hover selection script in 3d space. I’ll try it though and see if I can make it work. Thanks f.cherchi

Edit: I’m so stupid, I found a workaround. Monobehavior.OnMouseEnter and OnMouseExit work perfectly on an object with a Raycast.

4

Does anyone know how I can achieve a smooth progressive fade from this point?

void OnMouseEnter()
	{
		if(navitasPlayer.Instance.mode == "Sector"  selected == 0)
		{
			LerpColor(off, on, 1.0f);
			selected = 1;
		}
	}
	
	void OnMouseExit()
	{
		if(selected == 1)
		{
			LerpColor(on, off, 1.0f);
			//current = Color.Lerp(on, off, 10.0f);
			//renderer.material.color = current;
			selected = 0;
		}
	}
	
	void LerpColor(Color startCol, Color endCol, float time)
	{
		for(float i = 0.0f; i < 255.0f; i++)
		{
			current = Color.Lerp(startCol,endCol,time);
			renderer.material.color = current;
		}
	}