koobas.hobune.stream
Lerp between two int vaules smoothly
Hey Unity Pros,
so ive been trying to get this work since last night and it has given me hours of headache since because i dont know what is the problem or the bug in my code.
Basically I want to lerp from one int (eg.:1000points) to another (eg.:800points) using lerp to give that smoothing effect that it makes because its displayed to the player using UI Text.
The problem is that it doesnt work correctly or the way i want it to. It does weird things when I run the function such as showing me random numbers or just staying at 999points the whole time.
Here is an example of my code:
public void startSubtracting () { //also.. this is running in Update
score = 1000;
score = (int)Mathf.Lerp (score, 800, subtractSpeed * Time.deltaTime);
scoreText.text = score.ToString ();
}
I'd highly appreciate it if you guys could help me and thanks in advance!
So after struggling for a few more hours I managed to get the results I was looking for! (yaay:D) So I decided to post the little code that worked for me if someone else will need it in the future:) Thanks for the answeres tho!:)
float lerp = 0f, duration = 2f;
public void startSubtracting () {
score = 1000;
scoreTo = 800;
lerp += Time.deltaTime / duration;
score = (int)Mathf.Lerp (score, scoreTo, lerp);
scoreText.text = score.ToString ();
}
In my case the best solution for this is using vectors
using System.Collections; //for Vector3.Lerp
using UnityEngine.UI;
Vector3 score;
Vector3 target_score;
public Text score_text;
void Start () {
score= new Vector3 (0, 0, 0);
target_score= new Vector3 (100, 0, 0); // we run score to 100 points
}
void Update () {
score=Vector3.Lerp(score,target_score,Time.deltaTime);
score_text.text=(Mathf.RoundToInt(score.x)).ToString();
}
it's simple and nicely and smooth
The third parameter in the Lerp method needs to be a float between 0 and 1.
int t=0;
public void startSubtracting () { //also.. this is running in Update
score = 1000;
score = (int)Mathf.Lerp (score, 800, t);
t += subtractSpeed * Time.deltaTime;
if(t>1)
score=800;
scoreText.text = score.ToString ();
}
For more details see example here: https://docs.unity3d.com/ScriptReference/Mathf.Lerp.html
Hey fantom642,
thanks for the answer! I have tried your solution.. so if i set the subtractSpeed to 2f than the the score will "jiggle" between the 999 and 997.. if i remove time.deltatime it goes to 800 instantly.. no smoothing:( if i set the subtractSpeed to 0.1f for example i get 980(which is the 10% of the difference between the two ints.. oh and still no smoothing):(((
It's a bit old thread, but it may help others looking for a solution. I came up with the following formula:
int IntLerp(int a, int b, float t)
{
if (t > 0.9999f)
{
return b;
}
return a + (int)(((float)b - (float)a) * t);
}
