Vector3.lerp teleporting instead of lerp?

Questions & Answers
1

I have some clouds in my game wich i want to move left and right. I have the following code:

	private Vector3 startPos;
	private Vector3 endPos;
	void Start () {
		startPos = transform.position;
		endPos = new Vector3(startPos.x + 10f,startPos.y,startPos.z);
	}
	
	// Update is called once per frame
	void Update () {
		transform.position =  Vector3.Lerp(startPos,endPos,1f);
	
	}
}

For some reason the cloud is not lerping. But teleporting to the destination instead
Before I run the game the cloud is positioned here: alt text

after its positioned here: alt text

I know a speed of 1 could be fast but any number isnt working at all. I tried from 0.1-1
What am I doing wrong?

Cheers

2

hehe, 1 is as fast as you can possibly get

i’ll try to explain lerp to you

lerp has 3 components

a start point for the line

an end point for th line

and a third number which is 0 to 1

this third number can be viewed as this

“given a line with start point X and end point Y, give me the position Z percent distance along that line”

so a Z of 0 is the start, a Z of 1 is the end and a Z of .5 is the dead middle of the line

a speed of even .1 actaully would only take 10 frames to complete which is 1/6th of a second. In this case we actually need a special value.

This value is the time since the last frame, its referenced by typing time.deltatime

the proper way to use lerp in update is this

cloud.transform.position =   vector3.lerp(cloud.transform.position, finalposition, speed * time.deltatime);

good luck!

3

You could accumulate the last argument:

double lerpProgress = 0d;
Vector3 start;
//...........
void Awake()
{
  start = transform.position;
}
//...........
void Update()
{
  lerpProgress += speed * time.deltatime;
  cloud.transform.position = vector3.lerp(start, finalposition, lerpProgress);
  if(lerpProgress >= 1)
  {
    //Cloud Reached Destination, Do something....
    lerpProgress = 0;
  }
}