每次我使用 OnCollisionEnter2D 它都不起作用

Question

I want to make that the ball every time it hits the paddles increase its velocity but it does not works

ball.cs

using UnityEngine;

public class Ball : MonoBehaviour
{
    [SerializeField] private float velocityMultiplier = 1.1f;

    private void OnCollisioEnter2D(Collision2D collision)
    {
        if (collision.gameObject.CompareTag("Paddle"))
        {
            ballRb.velocity *= velocityMultiplier;
        }
    }
}

Here is the Paddle A inspector

PaddleA

and Paddle B is the same

Answer 1

Your colldier seems to be marked as Kinematic . It does not respond to colliders, and can only be moved with Scripts.

From docs:

Kinematic Rigidbody Collider

This is a GameObject with a Collider and a kinematic Rigidbody attached (ie, the IsKinematic property of the Rigidbody is enabled). You can move a kinematic rigidbody object from a script by modifying its Transform Component but it will not respond to collisions and forces like a non-kinematic rigidbody. Kinematic rigidbodies should be used for colliders that can be moved or disabled/enabled occasionally but that should otherwise behave like static colliders. An example of this is a sliding door that should normally act as an immovable physical obstacle but can be opened when necessary. Unlike a static collider, a moving kinematic rigidbody will apply friction to other objects and will “wake up” other rigidbodies when they make contact.

Source: https://docs.unity3d.com/Manual/CollidersOverview.html