Question Jump Rigidbody while moving

Hello,

I'm making a basic FPS controller, I do make the player move using the following code inside a Move() method called regularly from FixedUpdate():



Then, I also have this Jump() method called from FixedUpdate before the Move() method:



the code works correctly when the player isn't moving.

However, when the player is moving forward: it's just not working - the rigidbody barely make any movements.

I do not understand why. what am I missing?

 

That is a lot of logic to move a Rigidbody... looks like you are mixing a PD controller for horizontal motion with some type of transient timed force function for vertical jumping.

I'm not even sure how I would begin to understand such a setup, except perhaps to instrument it and feed it known inputs and study what it does with those known inputs.

All you really need is to drive X and Z velocity (WITHOUT touching the Y velocity!) based upon the move controls, then set the Y velocity (WITHOUT touching X,Z velocity!) based upon jump controls and let the physics system do everything else.

If you want gradual stop / start, just do the velocity target tweening yourself to mimic the PD controller's feel. I like to use this pattern:

Smoothing movement between any two particular values:

https://forum.unity.com/threads/beginner-need-help-with-smoothdamp.988959/#post-6430100

You have currentQuantity and desiredQuantity.
- only set desiredQuantity
- the code always moves currentQuantity towards desiredQuantity
- read currentQuantity for the smoothed value

Works for floats, Vectors, Colors, Quaternions, anything continuous or lerp-able.

The code: https://gist.github.com/kurtdekker/fb3c33ec6911a1d9bfcb23e9f62adac4