Ball wont go faster

Questions & Answers
1

Hello unity newbie here. I have a problem with one of my scripts. I´m trying to make a simple pong game where the ball will go faster everytime it hits one of the players.
But the ball only goes slower! Here is my script:

using UnityEngine;
using System.Collections;

public class Ball : MonoBehaviour {
	public int ballSpeed;
	
	void Start () {
		rigidbody.AddForce(new Vector3(Random.Range(-100.0F, 100.0F), 0, 0) * ballSpeed * Time.deltaTime);
	}
	
	void OnCollisionEnter (Collision col)
	{
		if(col.gameObject.name == "Player01")
		{
			float X = Random.Range(-5.0F, -15.0F);
			float Y = Random.Range(6.0F, -6.0F);
			ballSpeed += 100;
			rigidbody.AddForce(new Vector3(X, Y, 0) * ballSpeed * Time.deltaTime);
		}
		else if(col.gameObject.name == "Player02")
		{
			float X = Random.Range(5.0F, 15.0F);
			float Y = Random.Range(6.0F, -6.0F);
			ballSpeed += 100;
			rigidbody.AddForce(new Vector3(X, Y, 0) * ballSpeed * Time.deltaTime);
		}
	}
}
2

Two comments:

  • Firstly, I’d make ballSpeed a float. (i.e. public float ballSpeed; and ballSpeed += 100f;)

  • I don’t know why you’re multiplying the force by Time.deltaTime, but I’d be almost certain that you don’t want to, so try removing that from the force assignment. Time.deltaTime is generally used for changing values in a frame-independent manner, but it’s not applicable here since AddForce is an instantaneous event. When you do remove this term, you’ll probably need to adjust the scale of the other values, since you’re currently multiplying the force by an arbitrary small number that’s probably around 0.02.

3

Do you know about colliders and triggers? Try putting a a collider on the paddles and the ball, then check “is trigger”. I’m not sure if this will work. You’ll have to add a tag to each of the paddles.

`using UnityEngine;
using System.Collections;

public class Collider : MonoBehaviour

{

void OnTriggerEnter(Collider other)
{
	if (other gameObject.tag == "Paddle")
	{
		rigidbody.AddForce(10, 10, 0);
   }
 }

}`