> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ntop.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Boundary Polycurves from Open Mesh

Chain the free edges of an open surface mesh into ordered boundary loops and return each loop as a Polycurve. Returns an empty list for closed (watertight) meshes.

### Inputs

| Name | Type | Description |
| - | - | - |
| Mesh | [Mesh](../../../../block-documentation/types/mesh) | Open surface mesh to extract boundary loops from. |

### Outputs

| Type |
| - |
| [Polycurve List](../../../../block-documentation/types/polycurve) |


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