# Sandbox.PhysicsJointBuilderExtensions.WithFrame1

```csharp
static T WithFrame1(T b, Transform v)
```

Sets the joint frame in the first body's local space.

### Parameters

- `b` (`T`): The joint builder.
- `v` (`Transform`): The local joint frame.

### Returns

`T`: The joint builder.

Declared in [Sandbox.PhysicsJointBuilderExtensions](/api/Sandbox.PhysicsJointBuilderExtensions).
Assembly: `Sandbox.Engine`.