Time.deltaTime problems?

[AndreasX12]

Hello, I can understand that the Time.deltaTime is very important when moving something at a constant speed (in this case, a rigidbody), but I can’t get it to work.

With this code it work’s good, but I guess it won’t work well on slower computers.

	public int speed = 100;
	
	void FixedUpdate () {
		rigidbody.AddForce(transform.forward * speed);
	}

But with the Time.deltaTime it only moves very very slowly (barely noticeable) and it doesn’t work to set a higher speed value. (It doesn’t show any error’s in the Console)

	public int speed = 100;
	
	void FixedUpdate () {
		rigidbody.AddForce(transform.forward * speed * Time.deltaTime);
	}

Can you understand what the error is here?

Thanks, Andreas

[Nidre]

This " rigidbody.AddForce(transform.forward * speed);" adds 100 x of forward every frame so when you have 60 fixed frame per second it would mean 60 * 100 units of force.

But when you do this “rigidbody.AddForce(transform.forward * speed * Time.deltaTime);” it adds 100 units of force in 1 second.

So to compare
First example adds 60.000 in 1 second.
And the second example add 100 in 1 second.

İf you want to achieve the same speed like first example try setting the speed value to soemthing around 60.000.

That would work similiarly.