arenos-nexus/Arenos Nexus/Library/PackageCache/com.unity.shadergraph@940512a5d7e1/Documentation~/Normal-Unpack-Node.md

Normal Unpack Node

Description

Unpacks a normal map defined by input In. This node is used to unpack a texture that is defined as a Normal Map in its Texture Import Settings when it is sampled as if it were a default texture.

Data is stored in textures from 0 to 1. But vectors need to be from -1 to 1. Unpacking the normal means to expand its range from the original range to a range of -1 to 1, so you can use it as a vector.

Note that in most cases this node is unnecessary as the normal map should be sampled as such by setting its Type parameter to Normal when it is sampled using a Sample Texture 2D or Triplanar node.

Ports

Name	Direction	Type	Binding	Description
In	Input	Vector 4	None	Input value
Out	Output	Vector 3	None	Output value

Controls

Name	Type	Options	Description
Space	Dropdown	Tangent, Object	Sets the coordinate space of the input normal.

Generated Code Example

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

Tangent

void Unity_NormalUnpack_float(float4 In, out float3 Out)
{
    Out = UnpackNormalMapRGorAG(In);
}

Object

void Unity_NormalUnpackRGB_float(float4 In, out float3 Out)
{
    Out = UnpackNormalmapRGB(In);
}