# Keyframe

> Create a keyframe.

## Definition

* **Type:** Constructor
* **Namespace:** [UnityEngine](/engine/6000.0/script-reference/unityengine.md)
* **Assembly:** UnityEngine.CoreModule

## Keyframe(float, float)

Create a keyframe.

```csharp
public Keyframe(float time, float value)
```

### Parameters

**** (\[float]\(https\://learn.microsoft.com/dotnet/api/system.single)): **** (\[float]\(https\://learn.microsoft.com/dotnet/api/system.single)): 

### Examples

```csharp
using UnityEngine;

public class Example : MonoBehaviour
{
    // Make a GameObject follow a sine function.
    // Over the X and Y axis.

    AnimationCurve anim;
    Keyframe[] ks;

    void Start()
    {
        ks = new Keyframe[50];
        for (var i = 0; i < ks.Length; i++)
        {
            ks[i] = new Keyframe(i, Mathf.Sin(i));
        }
        anim = new AnimationCurve(ks);
    }

    void Update()
    {
        transform.position = new Vector3(Time.time, anim.Evaluate(Time.time), 0);
    }
}
```

## Keyframe(float, float, float, float)

Create a keyframe.

```csharp
public Keyframe(float time, float value, float inTangent, float outTangent)
```

### Parameters

**** (\[float]\(https\://learn.microsoft.com/dotnet/api/system.single)): **** (\[float]\(https\://learn.microsoft.com/dotnet/api/system.single)): **** (\[float]\(https\://learn.microsoft.com/dotnet/api/system.single)): **** (\[float]\(https\://learn.microsoft.com/dotnet/api/system.single)):&#x20;

### Examples

```csharp
using UnityEngine;

public class Example : MonoBehaviour
{
    // Make a GameObject follow a sine function.
    // Over the X and Y axis.

    AnimationCurve anim;
    Keyframe[] ks;

    void Start()
    {
        ks = new Keyframe[50];
        for (var i = 0; i < ks.Length; i++)
        {
            ks[i] = new Keyframe(i, Mathf.Sin(i), 90, 90);
        }
        anim = new AnimationCurve(ks);
    }

    void Update()
    {
        transform.position = new Vector3(Time.time, anim.Evaluate(Time.time), 0);
    }
}
```

## Keyframe(float, float, float, float, float, float)

Create a keyframe.

```csharp
public Keyframe(float time, float value, float inTangent, float outTangent, float inWeight, float outWeight)
```

### Parameters

**** (\[float]\(https\://learn.microsoft.com/dotnet/api/system.single)): **** (\[float]\(https\://learn.microsoft.com/dotnet/api/system.single)): **** (\[float]\(https\://learn.microsoft.com/dotnet/api/system.single)): **** (\[float]\(https\://learn.microsoft.com/dotnet/api/system.single)): **** (\[float]\(https\://learn.microsoft.com/dotnet/api/system.single)): **** (\[float]\(https\://learn.microsoft.com/dotnet/api/system.single)):&#x20;

### Examples

```csharp
using UnityEngine;

public class Example : MonoBehaviour
{
    // Make a GameObject follow a sine function.
    // Over the X and Y axis.

    AnimationCurve anim;
    Keyframe[] ks;

    void Start()
    {
        ks = new Keyframe[50];
        for (var i = 0; i < ks.Length; i++)
        {
            ks[i] = new Keyframe(i, Mathf.Sin(i), 0, 0, 0, 0);
        }
        anim = new AnimationCurve(ks);
    }

    void Update()
    {
        transform.position = new Vector3(Time.time, anim.Evaluate(Time.time), 0);
    }
}
```