Pong

Controls

ws

Github

https://github.com/katpavan/pong

Ideas 

• after you hit ball, hit spacebar to change it's direction once to fool the player. it takes x amount of time to change directions and changes colors before it does
• make it a betting game. computer vs computer, characters chosen at random
  • you get some fake currency make bets and first to 3 wins. it turns into an idle game lol.

Learned/Notes

• made GameManager a singleton and called the GameManager instance ResetRound function in the Ball Start function
• inheritance
  • I made a Paddle class and extended it with a ComputerPaddle and PlayerPaddle class
• only apply force if we're moving in a direction
  • if (direction.sqrMagnitude != 0)

• Create -> 2D -> Physics Material 2D
• FixedUpdate is where you almost always do physics related logic
• wrote some AI logic for the computer paddle
  • used the ball's position to determine whether the paddle should go up or down
  • if ball is moving away from computer paddle, then computer paddle goes idle in the center
• made a 2d physics material and put it on the 2d rigid body component of the ball
  • I set friction to 0 and bounciness to 1
• get the contact point of when the ball collides with something
  •  Vector2 normal = collision.GetContact(0).normal;
    • there could be multiple contact points, so we just want the first one
•   add a force to the ball based on the contact point of collision above
  • ball.AddForce(-normal * this.bounceStrength);
    • we do negative here because we need to add the force in the opposite direction
• Reset ball position and vector after a score
  •         _rigidbody.position = Vector3.zero;
            _rigidbody.velocity = Vector3.zero;

to detect if the ball went into a scoring zone, I used EventTrigger and put the script as a component onto the left and right walls of the game.

• using UnityEngine.EventSystems;
• public EventTrigger.TriggerEvent scoreTrigger;
• use the following inside OnCollisionEnter2D
  • BaseEventData eventData = new BaseEventData(EventSystem.current);
  • this.scoreTrigger.Invoke(eventData);
    • when the ball collides with our scoring zone, we trigger an event

• used TextMeshPro for the text
  • using TMPro;
  • [SerializeField] TextMeshProUGUI computerScore;
  • computerScore.text = _computerScore.ToString();