OnGUI messes with update(). How do i solve it?

Unity Engine
1

Lo there… Ima Unity noob in need of help.

In my update() i have some code wich enables me to drag and drop items across the scene using RayCastHit.
I recently added a OnGUI() function and suddenly i got alot of problems with my draging and dropping

Even if my OnGUI funciton is empty, i get these problems. I tried to google this problem and suspects it may have something to do with the event handeling, but is there a way around this?

Also, a separate question. If i create a c# class in Unity IDE and name it “test”. How do i instansiate it from another class?

test asd = new test();

doesnt seem to do the trick… I would like to make a istance of the class so i can call funcitons in it.

Hope you guys can help a noob out. Thanks.

2

You didn’t say what the problem is.

That looks right. Is it not working? (It’s common convention to capitalize class names, but what you have there should work.)

3

Didnt describe the problem enough. Sorry =)

The problem is that if i have a OnGUI() function in the class, the object that i am draging starts jumping funny. The code in the update() looks like this:

if (Input.GetMouseButtonDown(0))
        {
            activeCard = null;
            RaycastHit hit = new RaycastHit();
            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
            if (Physics.Raycast (ray, out hit))
            {
                activeCard = hit.collider;
                mouseOffset = new Vector3(activeCard.transform.position.x, activeCard.transform.position.y, activeCard.transform.position.z) - Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, CAMERA_HEIGHT));
            }
        }
        else if (Input.GetMouseButton(0))
        {   
            if (activeCard != null)
            {
                Vector3 mousePos = Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, CAMERA_HEIGHT - Mathf.Min(activeCard.transform.position.y + 0.2f, 1)));
                activeCard.transform.position = mousePos + mouseOffset;
            }
        }
        else if (Input.GetMouseButtonUp(0))
        {
            activeCard = null;
        }

When i start draging the object, i draw it closer to the camera so it looks like im picking it up. But when i have OnGUI() in my class, it constantly jumps up and down (closer and further fromt he camera) as im draging the object.

4

Your test() problem is probably to do with namespace.

If test() isn’t in the same script, it would need to be scriptname.test() or add “using scriptname”

5

Ok…So after doing some digging, i found that my problem was NOT in the update() function at all.

The Objects that are dragable have a OnMouseEnter() funciton that tweens their scale value so that they become bigger when you hover them. It also has a OnMouseExit() that tweens the size down again.

When i add the OnGUI() function, these two functions gets called repeatedly as if the mouse enters and exits them constantly… Why?

6

It’s a bug.

–Eric