# Sandbox.Gizmo.GizmoHitbox.AddPotentialLine

```csharp
void AddPotentialLine(in Vector3 p0, in Vector3 p1, float thickness)
```

If we're in a hitbox linescope we'll distance this test vs the current ray. If
not, we'll return immediately.
This is automatically called when rendering lines

### Parameters

- `in p0` (`Vector3`)
- `in p1` (`Vector3`)
- `thickness` (`float`)

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