Rasagar/Library/PackageCache/com.unity.shadergraph/Documentation~/Log-Node.md

Log Node

Description

Returns the logarithm of input In. Log is the inverse operation to the Exponential Node.

For example, the result of a base-2 Exponential using an input value of 3 is 8.

Therefore the result of a base-2 Log using an input value of 8 is 3.

The logarithmic base can be switched between base-e, base-2 and base-10 from the Base dropdown on the node.

Ports

Name	Direction	Type	Description
In	Input	Dynamic Vector	Input value
Out	Output	Dynamic Vector	Output value

Controls

Name	Type	Options	Description
Base	Dropdown	BaseE, Base2, Base10	Selects the logarithmic base

Generated Code Example

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

Base E

void Unity_Log_float4(float4 In, out float4 Out)
{
    Out = log(In);
}

Base 2

void Unity_Log2_float4(float4 In, out float4 Out)
{
    Out = log2(In);
}

Base 10

void Unity_Log10_float4(float4 In, out float4 Out)
{
    Out = log10(In);
}