如何修复 Unity Rigidbody.AddForce 问题？

Question

I'm making a bounce pad (jump pad if you like it like that). I wanted do make it bounce you OnTriggerEnter, which i have done using Rigidbody.AddForce.

And my problem is that it once bounces you higher, once lower, and sometimes does not bounce at all, you just fall on it.

Here's my code :

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class BouncerBouncing : MonoBehaviour
{
    public float bounceForce;

    public Rigidbody playerRigidbody;

    void OnTriggerEnter(Collider collider)
    {
        if(collider.gameObject.tag == "Player")
        {
            playerRigidbody.AddForce(0, bounceForce, 0, ForceMode.Impulse);
        }
    }
}

Thanks for your help!

Answer 1

Applying an inpulse of force won't cancel any contrary motion. For example, if you're falling down and your Y velocity is -10, applying an impulse with a velocity of 10 upwards will give you a total of 0. If you want to replace your Y velocity, you can directly set the velocity instead of applying force.

playerRigidbody.velocity = new Vector3(playerRigidbody.velocity.x, bounceForce, playerRigidbody.velocity.z);

This line simply replaces the Y velocity with the jump force while keeping the X and Z values as they were. This way, the bounce height will remain constant.