# Mapping Node

The *Mapping* node transforms the input vector by applying translation, rotation, and scaling.

## 輸入

The inputs of the node are dynamic. In particular, the *Location* input is only available in
the *Texture* and *Point* vector types.

- Vector
The vector to be transformed.

- Location
The amount of translation along each axis.

- Rotation
The amount of rotation along each axis. XYZ order.

- Scale
The amount of scaling along each axis.

## 屬性

- Vector Type
The node applies the transformation differently depending on the semantic type of the input vector.

- Point:
For this vector type, the node performs a straightforward transformation.

Transforming a texture coordinates is analogous to transforming a UV map. For instance, translating the texture coordinates along the

**positive**X axis would result in the evaluated texture to move in the**negative**X axis, much like if one translated a UV map. Similarly, scaling the texture coordinates**up**would result in the evaluated texture to scale**down**. So transforming the texture coordinates would appear to have the opposite effect on the evaluated texture.The order of transformation is: Scale --> Rotate --> Translate, which means:

Translation moves the input along the local rotation axis.

Rotation rotates the input around the origin of the space.

Scaling scales the input along the global axis.

- Texture:
For this vector type, the node performs an inverse transformation.

Inverse transforming a texture coordinates would, as opposed to the

*Point*type, transform the evaluated texture itself. For instance, translating the texture coordinates along the positive X axis would result in the evaluated texture to move in the positive X axis, as one would expected. Similarly, scaling the texture coordinates up would result in the evaluated texture to scale up, as one would expect.The order of transformation is: Translate --> Rotate --> Scale, which means:

Translation moves the input along the global axis.

Rotation rotates the input around the translation vector.

Scaling scales the input along the local rotation axis.

- Vector:
For this vector type, a

*Point*transformation is performed, but with zero translation.- Normal:
For this vector type, the node performs the inverse transpose of the transformation and normalize the result. Such transformation ensures correct normals after non-uniform scaling. So this type should be used when transforming normals.

## 輸出

- Vector
The input vector after transformation.