Smoothstep

Menu Path : Operator > Math > Arithmetic > Smoothstep

The Smoothstep Operator calculates the linear interpolation of a value between two border values with smoothing at the limits.

This Operator returns a value between X and Y. Where this value is between X and Y depends on the value of S:

• If S is greater than 1, the result is Y.

• If S is less than 0 the result is X.

• 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

This Operator accepts input values of various types. For the list of types this Operator can use, see Available Types. The X and Y input are always of the same type. S changes to be the same type as X and Y.

Operator properties

Input	Type	Description
X	Configurable	The value to interpolate from.
Y	Configurable	The value to interpolate to.
S	Configurable	A value for the interpolation. An input of either float type or the same type as X.

Output	Type	Description
Out	Output Port	The linear interpolation of S between X and Y with smoothing at the limits. The Type changes to match the type of X and Y.

Operator configuration

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. If S is a vector type, Unity calculates the interpolation value by value.

Available types

You can use the following types for your input ports:

• float
• Vector
• Vector2
• Vector3
• Vector4
• Position
• Direction