Version: 2017.3 (switch to 2018.1b)
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# Vector3.Dot

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public static method Dot(lhs: Vector3, rhs: Vector3): float;
public static float Dot(Vector3 lhs, Vector3 rhs);

## Description

Dot Product of two vectors.

The dot product is a float value equal to the magnitudes of the two vectors multiplied together and then multiplied by the cosine of the angle between them.

For normalized vectors Dot returns 1 if they point in exactly the same direction, -1 if they point in completely opposite directions and zero if the vectors are perpendicular.

```    // 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!");

}
}
}
```

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