study/first_study/Library/PackageCache/com.unity.shadergraph@3686fafd4720/Documentation~/Bitangent-Vector-Node.md

Bitangent Node

Description

Provides access to the mesh vertex or fragment's Bitangent Vector, depending on the effective Shader Stage of the graph section the Node is part of.

The bitangent vector is derived from the normal and tangent vectors and is orthogonal to both. The three vectors provide a reference frame to perform complex light calculations, for example.

You can select the coordinate space of the output with the Space dropdown parameter.

Ports

Name	Direction	Type	Binding	Description
Out	Output	Vector 3	None	Bitangent Vector for the Mesh Vertex/Fragment.

Controls

Name	Type	Options	Description
Space	Dropdown	Object, View, World, Tangent	Selects coordinate space of Bitangent Vector to output.