47 lines
2.3 KiB
Markdown
47 lines
2.3 KiB
Markdown
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# Smoothstep
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Menu Path : **Operator > Math > Arithmetic > Smoothstep**
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The **Smoothstep** Operator calculates the linear interpolation of a value between two border values with smoothing at the limits.
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This Operator returns a value between **X** and **Y**. Where this value is between **X** and **Y** depends on the value of **S**:
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- If **S** is greater than 1, the result is **Y**.
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- If **S** is less than 0 the result is **X.**
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- If **S** is between 0 and 1 then the result is a smooth transition between **X** and **Y**. The result = (Y - X) * ( 3S2 - 2S3 ) + **X**
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This Operator accepts input values of various types. For the list of types this Operator can use, see [Available Types](#available-types). The **X** and **Y** input are always of the same type. **S** changes to be the same type as **X** and **Y**.
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## Operator properties
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| **Input** | **Type** | **Description** |
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| --------- | --------------------------------------- | ------------------------------------------------------------ |
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| **X** | [Configurable](#operator-configuration) | The value to interpolate from. |
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| **Y** | [Configurable](#operator-configuration) | The value to interpolate to. |
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| **S** | [Configurable](#operator-configuration) | A value for the interpolation. An input of either float type or the same type as **X**. |
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| **Output** | **Type** | **Description** |
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| ---------- | ----------- | ------------------------------------------------------------ |
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| **Out** | Output Port | The linear interpolation of **S** between **X** and **Y** with smoothing at the limits.<br/>The **Type** changes to match the type of **X** and **Y**. |
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## Operator configuration
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To view the **Smoothstep** Operator’s configuration, click the **cog** icon in the Operator’s header. **X** and **Y** must be the same type among [Available Types](#available-types). If **S** is a vector type, Unity calculates the interpolation value by value.
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### Available types
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You can use the following types for your **input** ports:
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- **float**
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- **Vector**
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- **Vector2**
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- **Vector3**
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- **Vector4**
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- **Position**
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- **Direction**
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