Version: 2019.4

# Vector3.Lerp

マニュアルに切り替える
public static Vector3 Lerp (Vector3 a, Vector3 b, float t);

## 説明

Linearly interpolates between two points.

Interpolates between the points `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).

The value returned equals (b - a) * t. When `t` = 0 returns `a`. When `t` = 1 returns `b`. When `t` = 0.5 returns the point midway between `a` and `b`.

```using UnityEngine;
using System.Collections;public class ExampleClass : MonoBehaviour
{
// Transforms to act as start and end markers for the journey.
public Transform startMarker;
public Transform endMarker;    // Movement speed in units per second.
public float speed = 1.0F;    // Time when the movement started.
private float startTime;    // Total distance between the markers.
private float journeyLength;    void Start()
{
// Keep a note of the time the movement started.
startTime = Time.time;        // Calculate the journey length.
journeyLength = Vector3.Distance(startMarker.position, endMarker.position);
}    // Move to the target end position.
void Update()
{
// Distance moved equals elapsed time times speed..
float distCovered = (Time.time - startTime) * speed;        // Fraction of journey completed equals current distance divided by total distance.
float fractionOfJourney = distCovered / journeyLength;        // Set our position as a fraction of the distance between the markers.
transform.position = Vector3.Lerp(startMarker.position, endMarker.position, fractionOfJourney);
}
}
```