Lerp Node

Description

Returns the result of linearly interpolating between input A and input B by input T.

Unity calculates the output as:

A + T × (B − A)

The value of input T acts as a weight factor applied to the difference between B and A:

• When T is 0, the output equals A.
• When T is 1, the output equals B.
• When T is 0.5, the output is the midpoint between A and B.

The Lerp node uses Dynamic Vector slots, so A, B, and T always resolve to the same component count, which matches the smallest connected vector (larger vectors truncate). Scalars promote to the resolved size by duplicating their value across components.

Ports

Name	Direction	Type	Description
A	Input	Dynamic Vector	First input value
B	Input	Dynamic Vector	Second input value
T	Input	Dynamic Vector	Time value. Typical range: 0 to 1. Though you can use values outside of this range they may cause unpredictable results.
Out	Output	Dynamic Vector	Output value

Generated Code Example

The following example code represents one possible outcome of this node.

void Unity_Lerp_float4(float4 A, float4 B, float4 T, out float4 Out)
{
    Out = lerp(A, B, T);
}