RobotTribes Docs
Fall 2026
API

# Lovebot

o1.robots.Lovebot
class Lovebot(`name`: String, `body`: RobotBody, val `beloved`: RobotBody) extends RobotBrain

The class `Lovebot` represents the “brains” of robots which have another robot as their “beloved”. A lovebot tries to home in on its beloved.

## Parameters

beloved

  another robot that the lovebot targets

body

  the robot body whose actions the lovebot brain will control

name

  the name of the lovebot

## Attributes

Graph
Supertypes
  trait RobotBrain
  class Object
  trait Matchable
  class Any

## Members list

### Value members

#### Concrete methods

def moveBody(): Unit

Moves the robot. A lovebot tries to home in on its beloved unless it already is in an adjacent square (diagonally adjacent is not good enough). The lovebot blindly follows its primitive urges and doesn’t know how to avoid obstacles. If there is a wall or another bot in the chosen direction, the lovebot will collide with it (as per the `moveTowards` method of its body, possibly colliding and breaking itself or another robot).

Moves the robot. A lovebot tries to home in on its beloved unless it already is in an adjacent square (diagonally adjacent is not good enough). The lovebot blindly follows its primitive urges and doesn’t know how to avoid obstacles. If there is a wall or another bot in the chosen direction, the lovebot will collide with it (as per the `moveTowards` method of its body, possibly colliding and breaking itself or another robot).

The path of movement is chosen as follows. First, the lovebot calculates its distance to its target in both the x and y dimensions. Then, it moves one square so that either the horizontal (x) or the vertical (y) distance decreases by one, choosing the one that is greater. If the distances are equal, the horizontal distance is chosen. The lovebot turns to face the direction it attempts to move in, even if that attempt fails because of a collision.

A lovebot only moves one square per turn at most. The bot does not turn or move if it is already close enough to its beloved.

This method assumes that it is called only if the robot is not broken or stuck.

## Attributes

#### Inherited methods

def advanceCarefully(): Boolean

Moves the robot one square forwards, if there is nothing there. If that square isn’t empty, the robot does not move, so this method never causes a collision.

Moves the robot one square forwards, if there is nothing there. If that square isn’t empty, the robot does not move, so this method never causes a collision.

(Note: This method only moves the robot if the square in front of it is completely empty. This method does not call mayMove and is not affected by that other method’s implementation in any way.)

## Attributes

Returns

  `true` if the move was successful and the robot is now in the next square, `false` if it was blocked

Inherited from:
  RobotBrain

def controlTurn(): Unit

Controls the robot body’s actions for a single turn. If the brain considers the robot to be stuck (see isStuck), this method does nothing. If not stuck, the brain calls its own moveBody method, which carries out the actual robot actions.

Controls the robot body’s actions for a single turn. If the brain considers the robot to be stuck (see isStuck), this method does nothing. If not stuck, the brain calls its own moveBody method, which carries out the actual robot actions.

## Attributes

Inherited from:
  RobotBrain

def facing: `CompassDir`

Returns the direction this robot is facing in.

Returns the direction this robot is facing in.

## Attributes

Inherited from:
  RobotBrain

def isStuck: Boolean

Determines whether the robot brain considers the robot to be stuck. A brain considers the robot stuck if and only if all the squares surrounding the robot contain obstacles, as defined by the mayMove method. Only four squares are considered: the nearest square in each of the four main compass directions.

Determines whether the robot brain considers the robot to be stuck. A brain considers the robot stuck if and only if all the squares surrounding the robot contain obstacles, as defined by the mayMove method. Only four squares are considered: the nearest square in each of the four main compass directions.

## Attributes

Inherited from:
  RobotBrain

def location: `GridPos`

Returns the coordinates of this robot within its robot world.

Returns the coordinates of this robot within its robot world.

## Attributes

Inherited from:
  RobotBrain

def locationInFront: `GridPos`

Returns the coordinates that point at the square that is immediately in front of this robot.

Returns the coordinates that point at the square that is immediately in front of this robot.

## Attributes

Inherited from:
  RobotBrain

def mayMove(`direction`: `CompassDir`): Boolean

Checks the square that neighbors this robot in the given direction to see if it contains something that the robot brain considers an obstacle. This method is abstract; different kinds of robot brains will have different definitions of what counts as an obstacle.

Checks the square that neighbors this robot in the given direction to see if it contains something that the robot brain considers an obstacle. This method is abstract; different kinds of robot brains will have different definitions of what counts as an obstacle.

This default implementation (which may be overriden by subtypes) does not consider anything to be an obstacle. Robots that rely on this default implementation are willing to move in any direction and never consider themselves to be stuck (see isStuck).

## Attributes

Inherited from:
  RobotBrain

def name_=(`newName`: String): Unit

Changes the robot’s name to the given one.

Changes the robot’s name to the given one.

Note to students: In Scala, a method whose name ends in an underscore and an equals sign — like this one’s — can be called using a special syntax. For instance, this method can be called either with the statement `bot.name_=("Suzy")` or simply with an assignment statement: `bot.name = "Suzy"`. You won’t find many uses for this in O1, but it’s nice to know nonetheless.

## Attributes

Inherited from:
  RobotBrain

def robotInFront: Option[RobotBrain]

Returns the brain of the robot immediately in front of this robot. The brain is returned in an `Option` wrapper; `None` is returned if there is no robot in that square or if the robot that is there has no brain.

Returns the brain of the robot immediately in front of this robot. The brain is returned in an `Option` wrapper; `None` is returned if there is no robot in that square or if the robot that is there has no brain.

## Attributes

Inherited from:
  RobotBrain

def squareInFront: Square

Returns the square that is immediately in front of this robot.

Returns the square that is immediately in front of this robot.

## Attributes

Inherited from:
  RobotBrain

override def toString: String

Returns a textual representation of the robot (which is the robot’s name).

Returns a textual representation of the robot (which is the robot’s name).

## Attributes

Definition Classes
  RobotBrain -> Any
Inherited from:
  RobotBrain

def world: RobotWorld

Returns the world that this robot is located in.

Returns the world that this robot is located in.

## Attributes

Inherited from:
  RobotBrain

#### Concrete fields

val beloved: RobotBody