﻿ Unity - スクリプティング API: Vector3.Dot

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## スクリプト言語

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# Vector3.Dot

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public static function Dot(lhs: Vector3, rhs: Vector3): float;
public static float Dot(Vector3 lhs, Vector3 rhs);
public static def Dot(lhs as Vector3, rhs as Vector3) as float

## Description

2つのベクトルの内積

```	// detects if other transform is behind this object

var other : Transform;
function Update() {
if (other) {
var forward = transform.TransformDirection(Vector3.forward);
var toOther = other.position - transform.position;
if (Vector3.Dot(forward,toOther) < 0)
print ("The other transform is behind me!");
}
}
```
```using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
public Transform other;
void Update() {
if (other) {
Vector3 forward = transform.TransformDirection(Vector3.forward);
Vector3 toOther = other.position - transform.position;
if (Vector3.Dot(forward, toOther) < 0)
print("The other transform is behind me!");

}
}
}
```
```import UnityEngine
import System.Collections

public class ExampleClass(MonoBehaviour):

public other as Transform

def Update() as void:
if other:
forward as Vector3 = transform.TransformDirection(Vector3.forward)
toOther as Vector3 = (other.position - transform.position)
if Vector3.Dot(forward, toOther) < 0:
print('The other transform is behind me!')

```