Could you give an example of using `lerpVectors`?

🌵 Needle Engine
1

Hi, I´m trying to move a object from left to right using lerp (like unity) but is not working as I expected:


    update(): void {
        
               const wp = getWorldPosition(this.gameObject);      
        this.gameObject.position.lerpVectors(this.gameObject.position,new Vector3(wp.x,wp.y,wp.z+5),1 )
        this.gameObject.position.lerpVectors(this.gameObject.position,new Vector3(wp.x,wp.y,wp.z-5),1 )
        console.log(this.gameObject.position);
    }

Original Post on Discord

by user 632418299711324161

2

Hey :wave: in this case you can use .lerp istead of .lerpVectors, that can reduce the length of the code.
https://threejs.org/docs/index.html#api/en/math/Vector3.lerp

Mind that you are setting world position to your local position vector. Can you make sure that the values are correct?

3

If you’re always lerping with “1” as second parameter your object will jump there immediately.

You’ll most likely want something like this:

private targetPos = new Vector3(0,0,0);

onEnable() {
  getWorldPosition(this.gameObject, targetPos);
  targetPos.z -= 5;
}

update() {
  const wp = getWorldPosition(this.gameObject);
  wp.lerp(targetPos, this.context.time.deltaTime * 2);
  setWorldPosition(this.gameObject, wp);
}
4

getWorldPosition / setWorldPosition are a bit more convoluted than in Unity but otherwise it’s the same :slightly_smiling_face:

5

Thank you :slightly_smiling_face:

by user 632418299711324161