How to use same method for changing float value up/down ?

Unity Engine
1 
IEnumerator ChangeSpeed(float v_start, float v_end, float duration)
    {
        float elapsed = 0.0f;
        while (elapsed < duration)
        {
            speed = Mathf.Lerp(v_start, v_end, elapsed / duration);
            animator.SetFloat("Walk", speed);
            elapsed += Time.deltaTime;
            yield return null;
        }
        speed = v_end;
    }

Its working first time when changing to up :

private void Update()
    {
        var distance = Vector3.Distance(crate.position, player.position);
        if (distance < 1.7f && crateOpenOnce == false && unlockCrate.HasOpened())
        {
            rb.isKinematic = false;
            crateOpenOnce = true;
        }

        if(startSpeedUp)
        {
            if (playonce == false)
            {
                animator.Play("Walking");
                playonce = true;
            }

            StartCoroutine(ChangeSpeed(0, 1, 3f));


            var lookPos = target.position - player.position;
            lookPos.y = 0;
            var rotation = Quaternion.LookRotation(-lookPos);
            player.rotation = Quaternion.Slerp(player.rotation, rotation,
                Time.deltaTime * rotationSpeed);

            float playertargetdistane = Vector3.Distance(player.position, target.position);

            if(playertargetdistane < 1f && startSlow && animator.GetFloat("Walk") == 1f)
            {
                StartCoroutine(ChangeSpeed(1, 0, 3f));

                startSlow = false;
                startSpeedUp = false;
            }

        }
    }

First time I’m starting the coroutine like this :

StartCoroutine(ChangeSpeed(0, 1, 3f));

Its working fine than I’m starting the coroutine again this time from 1 to 0 :

StartCoroutine(ChangeSpeed(1, 0, 3f));

The first problem is how do I know if the coroutine ended first time before starting it again ? In this case I’m checking if the float value is 1 already but I’m not sure if this is the correct way to find if the coroutine ended and starting it again ?

The second problem is that when I start the coroutine second time from 1 to 0 it’s not changing it to 0 it keep staying on value 1.

2

Hi,

If you don’t check for already running coroutines, a new one will be launched in parallel everytime you call StartCoroutine(ChangeSpeed) in the Update loop (or even two times in the same loop). And all of them are messing with the same variable speed, and the Animator.Float(“Walk”, speed). That’s probably not the intention.