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# Vector3.Lerp

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public static function Lerp(a: Vector3, b: Vector3, t: float): Vector3;
public static Vector3 Lerp(Vector3 a, Vector3 b, float t);

## Description

Linearly interpolates between two vectors.

Interpolates between the vectors `a` and `b` by the interpolant `t`. The parameter `t` is clamped to the range [0, 1]. This is most commonly used to find a point some fraction of the way along a line between two endpoints (e.g. to move an object gradually between those points).

When `t` = 0 returns `a`. When `t` = 1 returns `b`. When `t` = 0.5 returns the point midway between `a` and `b`.

```	// Transforms to act as start and end markers for the journey.
var startMarker: Transform;
var endMarker: Transform;

// Movement speed in units/sec.
var speed = 1.0;

// Time when the movement started.
private var startTime: float;

// Total distance between the markers.
private var journeyLength: float;

function Start() {
// Keep a note of the time the movement started.
startTime = Time.time;

// Calculate the journey length.
journeyLength = Vector3.Distance(startMarker.position, endMarker.position);
}

// Follows the target position like with a spring
function Update () {
// Distance moved = time * speed.
var distCovered = (Time.time - startTime) * speed;

// Fraction of journey completed = current distance divided by total distance.
var fracJourney = distCovered / journeyLength;

// Set our position as a fraction of the distance between the markers.
transform.position = Vector3.Lerp(startMarker.position, endMarker.position, fracJourney);
}```
```using UnityEngine;
using System.Collections;public class ExampleClass : MonoBehaviour {
public Transform startMarker;
public Transform endMarker;
public float speed = 1.0F;
private float startTime;
private float journeyLength;
void Start() {
startTime = Time.time;
journeyLength = Vector3.Distance(startMarker.position, endMarker.position);
}
void Update() {
float distCovered = (Time.time - startTime) * speed;
float fracJourney = distCovered / journeyLength;
transform.position = Vector3.Lerp(startMarker.position, endMarker.position, fracJourney);
}
}
```