UV Pin options

In the Animation or Rigging menu set: Constrain > UV Pin >

UV Pin derives its positions from simple UV coordinates, where Proximity pin derives its positions using a input matrices from transforms.

This topic covers the options in the UV Pin window. To create a UV pin node, see Create a UV pin.

Note: There are additional controls for the UV Pin constraint in the Attribute Editor UV Pin tab. They are described in this topic, after the Connections and Coordinate System sections.

Connections

The Connections area lets you specify how pin locations on the target geometry are determined and how the output matrices are connected.

Pin locations

Select where pin locations are derived from:

Components: derived from location of the selected component
Transforms: derived from the closest points on the surface to the selected transforms.

Output

Specifies how the output matrices are connected. You can see the connections in the Node Editor.

Existing Transform	Uses the selected transforms and connects them to the uvPin's output. (This is the default.)
New Transform	Creates new transforms at the specified UV coordinates and connects them to the nodes output.
New Locator	Creates new locators at the specified UV coordinates and connects them to the nodes output.
Matrix	Creates but does not connect any output plugs on the node, leaving the connection available.

Coordinate System

This section determines how the outputs are aligned to the coordinate system of the surface as derived from the surface normal and UV coordinates. Because the UV Pin node is procedural, you can continue to edit these settings in Attribute Editor after creation, including the ability to create extra Inputs and Outputs.

Normal Axis: Specifies what axis of the coordinate system of the outputs should align with the surface normal. Cannot be the same as Tangent axis.
Tangent Axis: Specifies what axis of the coordinate system of the outputs to align with the surface tangent. Cannot be the same as Normal axis.
UV Set: If you have multiple UV sets in the scene, select the set you want to use.
Normalize Isoparms: Note: This option applies to NURBs only.; Because coordinate values for NURBs may be parameterized differently, activate this setting to use absolute values.

Attribute Editor options

The Attribute Editor UV Pin tab contains extra settings that are not covered in the Connections and Coordinate System sections.

Normal Override: Set Normal Override to Rail to let you connect the UV Pin constraint to Rail Curve geometry.