# Flow Along Curve

### <img src="https://3375153115-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F5uhW8FwQpXQj8tHUULMo%2Fuploads%2F0BimSKQRSDsqzXiqSx3s%2FG9_10_TRANSFORMATION_FLOW_CURVE.png?alt=media&#x26;token=477facd2-20e3-4402-964a-0d5f8fa365af" alt="" data-size="line"> Flow Along Curve <a href="#profiles" id="profiles"></a>

The **Flow** command re-aligns objects from a base curve to a target curve, making it useful for mapping flat or straight shapes to curved ones.

Command-line options:

* **TargetSurface**: Uses a surface to orient objects along a target curve based on surface normals.
* **Copy**: Creates a copy of the objects during the flow operation.
* **Rigid**: Moves objects along the target curve without deforming them.
* **RigidGroups**: Applies the Rigid option to groups when enabled.
* **Line**: Defines a line as the base curve for the flow operation.
* **Local**: Defines a "tube" of influence around the input curve, affecting only objects within this tube.
* **Stretch**: Stretches or compresses objects along the target curve to match their relationship to the base curve.
* **PreserveStructure**: Maintains the knot structure of curves and surfaces during deformation.
* **Roadlike**: Uses frames to calculate 3D rotation when objects are mapped to a 3D target curve.

These options allow for versatile transformations and precise control when aligning objects to curves.

For more information, please refer to the [Rhino documentation](https://docs.mcneel.com/rhino/8/help/en-us/commands/flow.htm#\(null\)).