Write IEnumerator for Movement - unity3d

Question

I want to write an IEnumerator to move at the desire distance at a specified time. I have tried to write the code for this but this is running a different way.
float moveDistance=1f;
float moveSpeed=5f;
float elapsedDistance = 0f;
while (elapsedDistance <= moveDistance)
{
elapsedDistance += Time.deltaTime * moveSpeed;
Vector3 cubeLocalPosition = transform.localPosition;
cubeLocalPosition.y += Time.deltaTime * moveDistance;
transform.localPosition = cubeLocalPosition;
yield return null;
}
Through this code, Object can't able to travel 1 unit distance. How can I correct this code?

Answer 1

Your while loop condition uses elapsedDistance which is increasing with moveSpeed. That latter is 5 so it will be 1 in 1/5 of a second. Your object is likely only moving 0.2unit.
you should use Mathf.Lerp or MoveTowards
float distance = 1f;
float time = 0f;
float period = 1f; // how long in second to do the whole movement
yield return new WaitUntil(()=>
{
time += Time.deltaTime / period;
float movement = Mathf.Lerp(0f, distance, time);
Vector3 cubeLocalPosition = transform.localPosition;
cubeLocalPosition.y += movement;
transform.localPosition = cubeLocalPosition;
return time >= 1f;
});

Answer 2

Following your own rotation, you calculate the finalpoint to go
and after,
you could use Vector3.Lerp or Vector.Slerp to move in the specified time..So the moving speed adapt itself following the time desired
var endpoint = transform.position + transform.forward.normalized * distance;
StartCoroutine(MoveToPosition(transform, endpoint, 3f)
:
:
public IEnumerator MoveToPosition(Transform transform, Vector3 positionToGO, float timeToMove)
{
var currentPos = transform.position;
var t = 0f;
while (t < 1f)
{
t += Time.deltaTime / timeToMove;
transform.position = Vector3.Lerp(currentPos, positionToGO, t);
yield return null;
}
transform.position = positionToGO;
}