Displaying velocity of a game object

Questions & Answers
1

Hi, I am working on to get a game object’s velocity. I got stock on displaying the values

using UnityEngine;
using System.Collections;

public class UnitDisplayScript : MonoBehaviour {

		
	void FixedUpdated() 
	{
		speed = GameObject.rigidbody.velocity.magnitude;
	}
	
	void OnGUI()
	{
		GUI.Box(new Rect(10,10,100,90), "Measurements");
		
		GUI.Label(new Rect(20,40,80,20), speed + "m/s");
	}
}

GUI does appear on the left top corner of the display. Just that velocity does not change…

If it does display will it be resultant velocity?
Also, how would I display vertical and horizontal velocity?

2

GameObject is the class where all the objects inherit from, in order to access the specific gameObject, write it with a non-capital letter. Change

GameObject.rigidbody.velocity.magnitude

to one of those alternatives

gameObject.rigidbody.velocity.magnitude
rigidbody.velocity.magnitude
GetComponent<Rigidbody>().velocity.magnitude

Note that rigidbody and GetComponent< Rigidbody>() are identical, so you better cache the rigidbody parameter in the Start Function and use that one (_rigidbody) all the time:

private Rigidbody _rigidbody;

private void Start()
{
    _rigidbody = rigidbody;
}

This may be micro optimizing, but as you plan to call this every frame it’s worth a thought.

3

im trying to do the same but it will only display 0. any ideas?

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

public class yeet : MonoBehaviour {

    private float speed;

    void FixedUpdated()
    {
        speed = GetComponent<Rigidbody>().velocity.magnitude;
    }
    void OnGUI()
    {
        GUI.Box(new Rect(10, 10, 100, 90), "Measurements");

        GUI.Label(new Rect(20, 40, 80, 20), "velocity is:" + speed );
    }
}