koobas.hobune.stream
What is wrong with this script ? if duration is 10 why the transform is moving in 11 seconds and not 10 ?
The main goal is to move the transform to a target then from the target back. Using lerp and make ease in out for both sides when moving to the target and when moving back.
I also want to display the seconds the transform passed in the ui text variable durationText but when it's moving to the target it's counting more then 5 and then back more then 10 more 11.
If i display in the durationText the Time.time then in the end i see 21 but it should be 20. If the duration is 10 i want the transform to move to the target in 10 seconds and back in 10 seconds overall 20 seconds.
I'm also not sure this two lines are correct and if i should change them or to make one line of movement instead of two ? The transform.position lines :
if (t < 0.5)
{
transform.position = Vector3.Lerp(originPosition, target, curve.Evaluate(t * 2));
}
else
{
transform.position = Vector3.Lerp(parent.transform.position, target, curve.Evaluate((1 - t) * 2));
}
The full script :
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class MovingTest : MonoBehaviour
{
public AnimationCurve curve = AnimationCurve.EaseInOut(0.0f, 0.0f, 1.0f, 1.0f);
public Transform pos1;
public Transform pos2;
public float duration;
public Text durationText;
private void Start()
{
durationText.text = "0";
}
void Update()
{
if (Input.GetKeyDown(KeyCode.G))
{
StartCoroutine(GoAndReturn(pos1.position, duration * 2));
}
}
IEnumerator GoAndReturn(Vector3 target, float duration)
{
var parent = this.transform.parent;
this.transform.parent = null;
var originPosition = this.transform.position;
var startTime = Time.time;
var t = 0f;
while (t <= 1)
{
t = (float)((Time.time - startTime) / duration);
durationText.text = t.ToString();
if (t < 0.5)
{
transform.position = Vector3.Lerp(originPosition, target, curve.Evaluate(t * 2));
}
else
{
transform.position = Vector3.Lerp(parent.transform.position, target, curve.Evaluate((1 - t) * 2));
}
yield return null;
}
this.transform.parent = parent;
this.transform.localPosition = Vector3.zero;
}
}
It seems fine though. It's just that you're printing text after adding to t variable, so it is possible to slightly exceed 20f (something like 20.05f is possible, depends on your framerate tbh). If you restructure your while loop, you'll be able to be more accurate:
while (t <= 1)
{
durationText.text = t.ToString();
if (t < 0.5)
{
transform.position = Vector3.Lerp(originPosition, target, curve.Evaluate(t * 2));
}
else
{
transform.position = Vector3.Lerp(parent.transform.position, target, curve.Evaluate((1 - t) * 2));
}
t = (float)((Time.time - startTime) / duration);
yield return null;
}
so addition goes after the operations are performed. This way operations will only be performed if t
