# `BB.LiveView.PlanarRobot`
[🔗](https://github.com/beam-bots/bb_liveview/blob/main/test/support/planar_robot.ex#L5)

A robot whose chain starts at a planar joint, for exercising the dashboard's
handling of configurations that aren't a single float.

A planar joint's configuration is a `BB.Math.Transform2D` and a floating
joint's a `BB.Math.Transform`, neither of which the browser can be handed
directly.

# `child_spec`

```elixir
@spec child_spec(Keyword.t()) :: Supervisor.child_spec()
```

Returns a child specification for starting this robot under a supervisor.

# `robot`

```elixir
@spec robot() :: BB.Robot.t()
```

Returns the optimised robot representation.

This struct is built at compile-time from the DSL definition and contains:
- All physical values converted to SI base units (floats)
- Flat maps for O(1) lookup of links, joints, sensors, and actuators
- Pre-computed topology metadata for efficient traversal

## Examples

    robot = Elixir.BB.LiveView.PlanarRobot.robot()
    {:ok, link} = BB.Robot.get_link(robot, :base_link)
    {:ok, joint} = BB.Robot.get_joint(robot, :shoulder)

# `start_link`

```elixir
@spec start_link(Keyword.t()) :: Supervisor.on_start()
```

Starts the robot's supervision tree.

## Options

All options are passed through to sensor and actuator child processes.

---

*Consult [api-reference.md](api-reference.md) for complete listing*