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Adam Graham edited this page Jan 18, 2022 · 26 revisions

FAQs

The ball keeps slowing down

This usually is an indication that the ball has drag which causes it to slow down over time. If you want your ball to maintain the same velocity and not slow down, set the Linear Drag property on the Rigidbody component to zero.

If the ball slows down when hitting a wall, it is because of the friction between the two objects colliding. To prevent this friction, add a Physics Material to your ball's collider component with the Friction value set to zero.

The AI keeps missing the ball

Try changing the Mass and Linear Drag on the Rigidbody component of your AI paddle. Reducing these values allow the paddle to more easily switch directions, which will help it to be in the right place at the right time to hit the ball. Be careful though, because you can create the opposite problem where the paddle never misses. Adjust the numbers to your preference. You can also change the speed property that we added to the paddle script to make it faster or slower overall.

There are no functions available to select for the score trigger

A common mistake here is dragging the GameManager.cs file into the field rather than the "Game Manager" object in your scene. After dragging in the scene object, you should see the functions available on each component attached to that object, including the functions made available in our script.

The other common mistake is not marking your functions as public in your code. Only public functions are available in the menu. If you don't explicitly set them to be public, then they will default to private.

public void PlayerScores()
{
    //...
}

Script variables are not showing up in the editor

There are two ways for a field to show up in the editor. It can be marked public:

public float speed;

Or you can use a special attribute:

[SerializeField] private float speed;

If the variable still does not show up, this might be an indication that you have a compiler error. Your code must successfully compile before any new fields will display in the editor. Check your console for any potential errors.

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