22 lines
955 B
Markdown
22 lines
955 B
Markdown
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# Bitangent Node
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## Description
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Provides access to the mesh vertex or fragment's **Bitangent Vector**, depending on the effective [Shader Stage](Shader-Stage.md) of the graph section the [Node](Node.md) is part of.
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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.
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You can select the coordinate space of the output with the **Space** dropdown parameter.
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## Ports
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| Name | Direction | Type | Binding | Description |
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|:------------ |:-------------|:-----|:---|:---|
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| Out | Output | Vector 3 | None | **Bitangent Vector** for the Mesh Vertex/Fragment. |
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## Controls
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| Name | Type | Options | Description |
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|:------------ |:-------------|:-----|:---|
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| Space | Dropdown | Object, View, World, Tangent | Selects coordinate space of **Bitangent Vector** to output. |
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