Control Ball velocity Angle

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#1

In similar android games, if the ball landed on either side of the paddle, the angle of the ball velocity changes.

#2

This is done at the end of the project by adjusting the shape of the collider to be angled on either side to cause it to bounce away in a non liner way.

1 Like
#3

Hello Fadi,

In addition to the info Martyn has provided, you may also want to have a look at this;

Hope this helps :slight_smile:

#4

It didn’t work, but its ok. But I\f I wanted to build the game on android and IOS, are there any changes needed to be made?

#5

Hi Fadi,

What didn’t work?

#6

The paddle impact point. I copied it and pasted onto my paddle script, but there wasn’t any noticeable change.

#7

Hello Fadi,

Did you change the name of the variable for the paddle? In the example script I linked to it is named _paddle but in your own script you may have the paddle variable called something else, paddle for example.

The script itself isn’t going to just make your ball rebound in a different direction, it’s just a starting point for you to build upon in order to achieve what you want to achieve.

#8

There is an error saying “An object reference is required to access non-static member” (referring to transform) in this line
Vector3 paddleLocalImpactPoint = Paddle.transform.InverseTransformPoint(impact.point);

#9

Could you copy/paste your code please.

#10 
using UnityEngine;
using System.Collections;
public class Paddle : MonoBehaviour {

	// Use this for initialization
	private void OnCollisionEnter2D(Collision2D collision)
{
    foreach (ContactPoint2D impact in collision.contacts)
    {
        if (collision.gameObject.name == "Paddle")
        {
            Vector3 paddleLocalImpactPoint = Paddle.transform.InverseTransformPoint(impact.point);

            Debug.Log("Paddle Impact\n\n" +
            "World: X = " + impact.point.x.ToString() + " Y = " + impact.point.y.ToString() + "\n" +
            "Local: X = " + paddleLocalImpactPoint.x + " Y = " + paddleLocalImpactPoint.y + "\n" +
            "\n-----------------------\n");
        }
    }
	}	
	// Update is called once per frame
	void Update () {
		Vector3 paddlePos= new Vector3 (0.5f, this.transform.position.y,0f);

		float mousePosInBlocks = Input.mousePosition.x / Screen.width *16;

		paddlePos.x = Mathf.Clamp(mousePosInBlocks,0.5f,15.5f);

		this.transform.position = paddlePos;
	}
}
#11

Hello Fadi,

The code is intended to go onto the Ball GameObject, as it is that which you are bouncing in a different direction.

If you don’t have a reference in code to your Paddle GameObject within Ball.cs you will need to create one and then use this variable name as mentioned earlier.

Something along the lines of;

using UnityEngine;

public class Ball : Monobehaviour
{
    private Paddle paddle;

    private void Start()
    {
        paddle = GameObject.FindObjectOfType<Paddle>();
    }

    private void OnCollisionEnter2D(Collision2D collision)
    {
        foreach (ContactPoint2D impact in collision.contacts)
        {
            if (collision.gameObject.name == "Paddle")
            {
                Vector3 paddleLocalImpactPoint = paddle.transform.InverseTransformPoint(impact.point);

                Debug.Log("Paddle Impact\n\n" +
                "World: X = " + impact.point.x.ToString() + " Y = " + impact.point.y.ToString() + "\n" +
                "Local: X = " + paddleLocalImpactPoint.x + " Y = " + paddleLocalImpactPoint.y + "\n" +
                "\n-----------------------\n");
            }
        }
    } 

    // ... the rest of the ball.cs code   
}

Also, please use the code formatting characters when copy/pasting code, it makes it a lot easier for people to read. Thanks.

See also;

#12

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#13

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