# Bridge

## <img src="https://3375153115-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F5uhW8FwQpXQj8tHUULMo%2Fuploads%2FHHsyVMt1bUek2Pq80GLu%2FG6_03_SUBD_BRIDGE.png?alt=media&#x26;token=38c39deb-2550-48bb-bb46-045136013a5d" alt="" data-size="line"> Bridge <a href="#profiles" id="profiles"></a>

The Bridge command creates faces to connect two SubD/Mesh edge chains.

<div align="left"><img src="https://docs.mcneel.com/rhino/8/help/en-us/image/topic_illustrations/bridge_betweenfaces.gif" alt=""></div>

### Input

* Two naked SubD/Mesh edge chains
* Boundaries of two SubD/Mesh face groups

#### **Steps**

1. Start the command.
2. Select the first naked edge chain or face group, press Enter.
3. Select the second naked edge chain or face group, press Enter.

   The two edge chains must have the same edge number.
4. Click the bridge endpoints to adjust alignment as needed, press Enter.

### Options

#### **Edge selection mode**

* **(Default)**

  Click selects a single edge. Double-click selects an edge loop.

  Ctrl+click deselects a single edge. Ctrl+double-click deselects an edge loop.
* **EdgeLoop**

  Click an edge to select an edge loop.

  The clicked edge displays a brighter highlight than the other edges in the loop.

  Ctrl+click the same edge to deselect the loop.

#### **Segments**

The number of new faces added between the two edge chains.

<div align="left"><img src="https://docs.mcneel.com/rhino/8/help/en-us/image/topic_illustrations/bridge_segments.gif" alt=""></div>

* **Join**

  Joins the bridge into the input objects. Uncheck to create a stand-alone bridge.
* **Crease (For Join=Yes only)**

  **Enabled**

  Mesh - The bridge is joined with the input meshes.

  SubD - The bridge connects to the input SubDs with creased edges.

  **Disabled**

  Mesh - The bridge is welded with the input meshes.

  SubD - The bridge connects to the input SubDs with smooth edges.

#### **Straightness (0\~100%)**

The straight level of the bridge transition. 100% creates a straight bridge. Decreasing the value creates a smoother bridge. A smooth bridge requires more segments to achieve.

<div align="left"><img src="https://docs.mcneel.com/rhino/8/help/en-us/image/topic_illustrations/bridge_smoothness.gif" alt=""></div>

### Adjust alignment

#### **Change chain directions**

Arrowheads indicate chain directions. Chain directions are automatically detected to create a non-tangled bridge. However, you can click an endpoint of a chain to reverse the direction.

<div align="left"><img src="https://docs.mcneel.com/rhino/8/help/en-us/image/topic_illustrations/bridge_changedirection.gif" alt=""></div>

#### **Move seam location (For closed loops only)**

The seam location is selected based on the first picked edge. Click a point to move the seam location to that point. Click the seam point to reverse the chain direction.

<div align="left"><img src="https://docs.mcneel.com/rhino/8/help/en-us/image/topic_illustrations/bridge_moveseam.gif" alt=""></div>

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