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Question by Firelights · Aug 31, 2016 at 01:08 PM · c#transformscalelerpif-statements

If statement not getting called after Lerping a Scale

I have t$$anonymous$$s script where my object grows in scale and then shrinks back down when it reaches the maxScale, but when maxScale and $$anonymous$$s X Scale are the same.. it doesn't switch to the other ... I tried printing the values to see if they ever became the same and they eventually did, so why doesn't the If statement ever get called ?

 public class knockBack : MonoBehaviour
 {
     public bool growing;
 
     public float maxScale;
 
     private float minScale;
 
     public float speed;
 
     // Use t$$anonymous$$s for initialization
     void Start()
     {
         minScale = transform.localScale.x;
         growing = true;
     }
 
     void FixedUpdate()
     {
         Manager.Enemy.Knockback = true;
 
         if (growing)
         {
             transform.localScale = Vector3.Lerp(transform.localScale, new Vector3(maxScale, maxScale, 0.1f), speed);
             print(maxScale + "," + transform.localScale.x);
 
             if (maxScale <= transform.localScale.x)
             {
                 growing = false;
                 print("should stop growing!!");
             }
         }
         else
         {
             if (minScale < transform.localScale.x)
             {
                 transform.localScale = Vector3.Lerp(transform.localScale, new Vector3(minScale, minScale, 0.1f), speed);
             }
         }
     }
 }
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avatar image NoseKills · Sep 14, 2016 at 06:35 AM 0
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Have you tried printing out print(maxScale == transform.localScale.x); to see if they ACTUALLY become the same ? Numbers that you log out can always get formatted in several ways and might look the same in console but still have a fraction of difference.

If you read what Lerp actually does, you'll see that condition should not become true unless speed is 1 at some point (or after a long while when the values get so close to eachother that floating point accuracy fails to make a difference between them):

I mean.. if an object always travels 99% of the distance to a target location, it doesn't matter how many times it does so, mathematically it will never reach the target location. It will always be 1% of previous distance away from the target.

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Answer by The-Evster · Aug 31, 2016 at 01:15 PM

The if statement is only called if growing = true and on the 29th line it is set to false and no where in the rest of the script is it being reset to true.

hope t$$anonymous$$s was helpful

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avatar image Firelights · Sep 13, 2016 at 11:32 AM 0
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growing never gets to false because that part of the code doesn't read, wich is what I want.

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