Need help with ground check when jumping

Unity Engine
, , ,
1

No guide or anything has been able to help me so far. They keep bringing in new issues that take much more effort to fix. Currently I can jump mid air and I need to fix that. Another issue I have is that it sometimes randomly makes me fly high up into the sky when I press jump, way more than it should.

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

public class Character_jump :  MonoBehaviour
{
    public float jumpforce = 10f;
    Rigidbody rb;

    void Start()
    {
        rb = GetComponent<Rigidbody>();
    }

    void FixedUpdate()
    {
        if (Input.GetKeyDown(KeyCode.Space))
        {
            
            rb.AddForce(Vector3.up * jumpforce, ForceMode.Impulse);

        }

    }


}
2

You can’t use GetKeyDown in FixedUpdate.

Try this:

	void FixedUpdate()
	{
		if (Input.GetButton("Jump"))
			if (Physics.SphereCast(transform.position,0.5f,-transform.up,out RaycastHit hit,0.51f)) // something below?
				rb.AddForce(Vector3.up*(jumpforce-rb.velocity.y),ForceMode.Impulse);
	}
3

I don’t know if I have raycast set up and IDK how to do raycast.

4

Thank you so much, I got it working and now I don’t fly up into the sky and I can now not jump mid-air.