Class BaseBot

Abstract bot class that takes care of communication between the bot and the server, and sends notifications through the event handlers. Most bots can inherit from this class to get access to basic methods.

Inheritance

object

BaseBot

Bot

Implements

IBaseBot

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: Robocode.TankRoyale.BotApi

Assembly: api.dll

Syntax

public abstract class BaseBot : IBaseBot

Constructors

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BaseBot()

Constructor for initializing a new instance of the BaseBot class. This constructor should be used when both BotInfo and server URL is provided through environment variables, i.e., when starting up the bot using a booter. These environment variables must be set to provide the server URL and bot information, and are automatically set by the booter tool for Robocode.

Declaration

protected BaseBot()

Examples

Example of how to set the predefined environment variables used for connecting to the server:

SERVER_URL=ws://localhost:7654
SERVER_SECRET=xzoEeVbnBe5TGjCny0R1yQ

Example of how to set the environment variables that covers the BotInfo:

BOT_NAME=MyBot
BOT_VERSION=1.0
BOT_AUTHORS=John Doe
BOT_DESCRIPTION=Short description
BOT_HOMEPAGE=https://somewhere.net/MyBot
BOT_COUNTRY_CODES=us
BOT_GAME_TYPES=melee,1v1
BOT_PLATFORM=.Net 6.0
BOT_PROG_LANG=C# 10.0
BOT_INITIAL_POS=50,70, 270

These environment variables must be set prior to using this constructor:

BOT_NAME
BOT_VERSION
BOT_AUTHORS

These value can take multiple values separated by a comma:

BOT_AUTHORS, e.g. "John Doe, Jane Doe"
BOT_COUNTRY_CODES, e.g. "se, no, dk"
BOT_GAME_TYPES, e.g. "classic, melee, 1v1"

The BOT_INITIAL_POS variable is optional and should only be used for debugging.

The SERVER_SECRET must be set if the server requires a server secret for the bots trying to connect. Otherwise, the bot will be disconnected as soon as it attempts to connect to the server.

If the SERVER_URL is not set, then this default URL is used: ws://localhost:7654

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BaseBot(BotInfo)

Constructor for initializing a new instance of the BaseBot class. This constructor assumes the server URL and secret is provided by the environment variables SERVER_URL and SERVER_SECRET.

Declaration

protected BaseBot(BotInfo botInfo)

Parameters

Type	Name	Description
BotInfo	botInfo	Is the bot info containing information about your bot.

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BaseBot(BotInfo, Uri)

Constructor for initializing a new instance of the BaseBot class.

Declaration

protected BaseBot(BotInfo botInfo, Uri serverUrl)

Parameters

Type	Name	Description
BotInfo	botInfo	Is the bot info containing information about your bot.
Uri	serverUrl	Is the server URL

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BaseBot(BotInfo, Uri, string)

Constructor for initializing a new instance of the BaseBot class.

Declaration

protected BaseBot(BotInfo botInfo, Uri serverUrl, string serverSecret)

Parameters

Type	Name	Description
BotInfo	botInfo	Is the bot info containing information about your bot.
Uri	serverUrl	Is the server URL
string	serverSecret	Is the server secret for bots

Properties

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AdjustGunForBodyTurn

Sets the gun to adjust for the bot´s turn when setting the gun turn rate. So the gun behaves like it is turning independent of the bot´s turn.

Ok, so this needs some explanation: The gun is mounted on the bot´s body. So, normally, if the bot turns 90 degrees to the right, then the gun will turn with it as it is mounted on top of the bot´s body. To compensate for this, you can adjust the gun for the body turning. When this is set, the gun will turn independent of the body turning.

note

This property is additive until you reach the maximum the gun can turn MaxGunTurnRate. The "adjust" is added to the amount, you set for turning the bot by the turn rate, then capped by the physics of the game.

The gun compensating this way does count as "turning the gun".

Declaration

public bool AdjustGunForBodyTurn { get; set; }

Property Value

Type	Description
bool	`true` if the gun is set to adjust for the body turning; `false` otherwise (default).

AdjustRadarForBodyTurn

Sets the radar to adjust for the body's turn when setting the radar turn rate. So the radar behaves like it is turning independent of the body's turn.

Ok, so this needs some explanation: The radar is mounted on the gun, and the gun is mounted on the bot´s body. So, normally, if the bot turns 90 degrees to the right, the gun turns, as does the radar. Hence, if the bot turns 90 degrees to the right, then the gun and radar will turn with it as the radar is mounted on top of the gun. To compensate for this, you can adjust the radar for the body turn. When this is set, the radar will turn independent of the body's turn.

note

This property is additive until you reach the maximum the radar can turn MaxRadarTurnRate. The "adjust" is added to the amount, you set for turning the body by the body turn rate, then capped by the physics of the game.

The radar compensating this way does count as "turning the radar".

Declaration

public bool AdjustRadarForBodyTurn { get; set; }

Property Value

Type	Description
bool	`true` if the radar is set to adjust for the body turning; `false` otherwise (default).

AdjustRadarForGunTurn

Sets the radar to adjust for the gun's turn when setting the radar turn rate. So the radar behaves like it is turning independent of the gun's turn.

Ok, so this needs some explanation: The radar is mounted on the gun. So, normally, if the gun turns 90 degrees to the right, then the radar will turn with it as it is mounted on top of the gun. To compensate for this, you can adjust the radar for the gun turn. When this is set, the radar will turn independent of the gun turning.

note

This property is additive until you reach the maximum the radar can turn MaxRadarTurnRate. The "adjust" is added to the amount, you set for turning the gun by the gun turn rate, then capped by the physics of the game.

When the radar compensates this way it counts as "turning the radar", even when it is not explicitly turned by calling a method for turning the radar.

note

This method automatically disables fire assistance when set to true, and automatically enables fire assistance when set to false. This is not the case for AdjustGunForBodyTurn and AdjustRadarForBodyTurn. Read more about fire assistance with the SetFireAssist(bool) method.

Declaration

public bool AdjustRadarForGunTurn { get; set; }

Property Value

Type	Description
bool

ArenaHeight

Height of the arena measured in unit.

First available when the game has started.

Declaration

public int ArenaHeight { get; }

Property Value

Type	Description
int	The arena height measured in units

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ArenaWidth

Width of the arena measured in unit.

First available when the game has started.

Declaration

public int ArenaWidth { get; }

Property Value

Type	Description
int	The arena width measured in units

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BodyColor

The color of the body. Colors can (only) be changed each turn.

Declaration

public Color? BodyColor { get; set; }

Property Value

Type	Description
Color?	Is the color of the body or `null` if the bot must use the default color.

Examples

BodyColor = Color.RED; // the red color BodyColor = new Color(255, 0, 0); // also the red color

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BulletColor

The color of the fired bullets. Colors can (only) be changed each turn.

Note that a fired bullet will not change is color when it has been fired. But new bullets fired after setting the bullet color will get the new color.

Declaration

public Color? BulletColor { get; set; }

Property Value

Type	Description
Color?	Is the color of the fired bullets or `null` if the bot must use the default color.

Examples

BulletColor = Color.RED; // the red color BulletColor = new Color(255, 0, 0); // also the red color

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BulletStates

Current bullet states. Keeps track of all the bullets fired by the bot, which are still active on the arena.

Declaration

public IEnumerable<BulletState> BulletStates { get; }

Property Value

Type	Description
IEnumerable<BulletState>	The current bullet states.

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Direction

Current driving direction of the bot in degrees.

Declaration

public double Direction { get; }

Property Value

Type	Description
double	The current driving direction of the bot.

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EnemyCount

Number of enemies left in the current round.

Declaration

public int EnemyCount { get; }

Property Value

Type	Description
int

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Energy

Current energy level. When the energy level is positive, the bot is alive and active. When the energy level is 0, the bot is still alive but disabled. If the bot becomes disabled it will not be able to move or take any action. If negative, the bot has been defeated.

Declaration

public double Energy { get; }

Property Value

Type	Description
double	The current energy level.

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Events

an ordered list containing all events currently in the bot's event queue. You might, for example, call this while processing another event.

Declaration

public IList<BotEvent> Events { get; }

Property Value

Type	Description
IList<BotEvent>	an ordered list containing all events currently in the bot's event queue.

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Firepower

The firepower.

Declaration

public double Firepower { get; }

Property Value

Type	Description
double	The firepower

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GameType

Game type, e.g. "melee" or "1v1".

First available when the game has started.

Declaration

public string GameType { get; }

Property Value

Type	Description
string	The game type

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Graphics

Graphics object that the bot can paint debug information to.

Declaration

public virtual IGraphics Graphics { get; }

Property Value

Type	Description
IGraphics	A graphics canvas to use for painting graphical objects making debugging easier.

Examples

var g = Graphics; g.FillRectangle(Brushes.Blue, 50, 50, 100, 100);

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GunColor

The color of the gun. Colors can (only) be changed each turn.

Declaration

public Color? GunColor { get; set; }

Property Value

Type	Description
Color?	Is the color of the gun or `null` if the bot must use the default color.

Examples

GunColor = Color.RED; // the red color GunColor = new Color(255, 0, 0); // also the red color

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GunCoolingRate

Gun cooling rate. The gun needs to cool down to a gun heat of zero before the gun can fire. The gun cooling rate determines how fast the gun cools down. That is, the gun cooling rate is subtracted from the gun heat each turn until the gun heat reaches zero.

First available when the game has started.

Declaration

public double GunCoolingRate { get; }

Property Value

Type	Description
double	The gun cooling rate

GunDirection

Current direction of the gun in degrees.

Declaration

public double GunDirection { get; }

Property Value

Type	Description
double	The current gun direction of the bot.

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GunHeat

Current gun heat. When the is fired it gets heated and will not be able to fire before it has been cooled down. The gun is cooled down when the gun heat is zero.

When the gun has fired the gun heat is set to 1 + (firepower / 5) and will be cooled down by the gun cooling rate.

Declaration

public double GunHeat { get; }

Property Value

Type	Description
double	The current gun heat.

GunTurnRate

Set or get the turn rate of the gun, which can be positive and negative. The gun turn rate is measured in degrees per turn. The turn rate is added to the current turn direction of the gun. But it is also added to the current direction of the radar. This is because the radar is mounted on the gun, and hence moves with the gun. You can compensate for the turn rate of the gun by subtracting the turn rate of the gun from the turn rate of the radar. But be aware that the turn limits defined for the radar cannot be exceeded.

The gun turn rate is truncated to MaxGunTurnRate if the gun turn rate exceeds this value.

If this property is set multiple times, the last value set before Go() counts.

Declaration

public virtual double GunTurnRate { get; set; }

Property Value

Type	Description
double	The turn rate of the gun.

Interruptible

Set this property during an event handler to control continuing or restarting the event handler, when a new event occurs again for the same event handler while processing an earlier event.

Declaration

public bool Interruptible { set; }

Property Value

Type	Description
bool	`true` if the event handler should be interrupted and hence restart when a new event of the same event type occurs again; `false` otherwise where the event handler will continue processing.

Examples

Example:

public void OnScannedBot(ScannedBotEvent e)
{
    Fire(1);
    Interruptible = true;
    Forward(100); // When a new bot is scanned while moving forward this handler will restart
                  // from the top as this event handler has been set to be interruptible
                  // right after firing. Without Interruptible = true, new scan events
                  // would not be triggered while moving forward.
    // We'll only get here if we do not see a robot during the move.
    Console.WriteLine("No bots were scanned");
}

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IsDebuggingEnabled

Flag indicating if graphical debugging is enabled and hence if Graphics can be used for debug painting.

Declaration

public virtual bool IsDebuggingEnabled { get; }

Property Value

Type	Description
bool	`true` if the graphics debugging is enabled; `false` otherwise.

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IsDisabled

Specifies if the bot is disabled, i.e., when the energy is zero. When the bot is disabled, it is not able to take any action like movement, turning, and firing.

Declaration

public bool IsDisabled { get; }

Property Value

Type	Description
bool	`true` if the bot is disabled; `false` otherwise

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IsStopped

Checks if the movement has been stopped.

Declaration

public bool IsStopped { get; }

Property Value

Type	Description
bool	`true` if the movement has been stopped by by Stop() or SetStop(); `false` otherwise.

MaxGunTurnRate

Sets or gets the maximum turn rate which applies to turn the gun to the left or right. The maximum turn rate must be an absolute value from 0 to MaxGunTurnRate, both values are included. If the input turn rate is negative, the max turn rate will be cut to zero. If the input turn rate is above MaxGunTurnRate, the max turn rate will be set to MaxGunTurnRate.

If for example the max gun turn rate is set to 5, then the gun will be able to turn left or right with a turn rate down to -5 degrees per turn when turning right and up to 5 degrees per turn when turning left.

This method will first be executed when Go() is called making it possible to call other set methods before execution. This makes it possible to set the bot to move, turn the body, radar, gun, and also fire the gun in parallel in a single turn when calling Go(). But notice that this is only possible to execute multiple methods in parallel by using setter methods only prior to calling Go().

If this method is called multiple times, the last call before Go() is executed, counts.

Declaration

public double MaxGunTurnRate { get; set; }

Property Value

Type	Description
double	The maximum turn rate of the gun.

MaxInactivityTurns

The maximum number of inactive turns allowed the bot will become zapped by the game for being inactive. Inactive means that the bot has taken no action in several turns in a row.

First available when the game has started.

Declaration

public int? MaxInactivityTurns { get; }

Property Value

Type	Description
int?	The maximum number of allowed inactive turns.

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MaxRadarTurnRate

Sets or gets the maximum turn rate which applies to turn the radar to the left or right. The maximum turn rate must be an absolute value from 0 to MaxRadarTurnRate, both values are included. If the input turn rate is negative, the max turn rate will be cut to zero. If the input turn rate is above MaxRadarTurnRate, the max turn rate will be set to MaxRadarTurnRate.

If for example the max radar turn rate is set to 5, then the radar will be able to turn left or right with a turn rate down to -5 degrees per turn when turning right and up to 5 degrees per turn when turning left.

If this method is called multiple times, the last call before Go() is executed, counts.

Declaration

public double MaxRadarTurnRate { get; set; }

Property Value

Type	Description
double	The maximum turn rate of the radar.

MaxSpeed

Sets or gets the maximum speed which applies when moving forward and backward. The maximum speed must be an absolute value from 0 to MaxSpeed, both values are included. If the input speed is negative, the max speed will be cut to zero. If the input speed is above MaxSpeed, the max speed will be set to MaxSpeed.

If for example the maximum speed is set to 5, then the bot will be able to move backwards with a speed down to -5 units per turn and up to 5 units per turn when moving forward.

If this method is called multiple times, the last call before Go() is executed, counts.

Declaration

public double MaxSpeed { get; set; }

Property Value

Type	Description
double	The maximum speed.

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MaxTurnRate

Sets or gets the maximum turn rate which applies to turn the bot to the left or right. The maximum turn rate must be an absolute value from 0 to MaxTurnRate, both values are included. If the input turn rate is negative, the max turn rate will be cut to zero. If the input turn rate is above MaxTurnRate, the max turn rate will be set to MaxTurnRate.

If for example the max turn rate is set to 5, then the bot will be able to turn left or right with a turn rate down to -5 degrees per turn when turning right, and up to 5 degrees per turn when turning left.

If this method is called multiple times, the last call before Go() is executed, counts.

Declaration

public double MaxTurnRate { get; set; }

Property Value

Type	Description
double	The maximum turn rate of the bot.

MyId

Unique id of this bot, which is available when the game has started.

Declaration

public int MyId { get; }

Property Value

Type	Description
int	The unique id of this bot.

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NumberOfRounds

The number of rounds in a battle.

First available when the game has started.

Declaration

public int NumberOfRounds { get; }

Property Value

Type	Description
int	The number of rounds in a battle.

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RadarColor

The color of the radar. Colors can (only) be changed each turn.

Declaration

public Color? RadarColor { get; set; }

Property Value

Type	Description
Color?	Is the color of the radar or `null` if the bot must use the default color.

Examples

RadarColor = Color.RED; // the red color RadarColor = new Color(255, 0, 0); // also the red color

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RadarDirection

Current direction of the radar in degrees.

Declaration

public double RadarDirection { get; }

Property Value

Type	Description
double	The current radar direction of the bot.

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RadarTurnRate

Set or get the turn rate of the radar, which can be positive and negative. The radar turn rate is measured in degrees per turn. The turn rate is added to the current direction of the radar. Note that besides the turn rate of the radar, the turn rates of the bot and gun are also added to the radar direction, as the radar moves with the gun, which is mounted on the gun that moves with the body. You can compensate for the turn rate of the gun by subtracting the turn rate of the bot and gun from the turn rate of the radar. But be aware that the turn limits defined for the radar cannot be exceeded.

The radar turn rate is truncated to MaxRadarTurnRate if the radar turn rate exceeds this value.

If this property is set multiple times, the last value set before Go() counts.

Declaration

public virtual double RadarTurnRate { get; set; }

Property Value

Type	Description
double	The turn rate of the radar.

RoundNumber

Current round number.

Declaration

public int RoundNumber { get; }

Property Value

Type	Description
int	The current round number.

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ScanColor

The color of the scan arc. Colors can (only) be changed each turn.

Declaration

public Color? ScanColor { get; set; }

Property Value

Type	Description
Color?	Is the color of the scan arc or `null` if the bot must use the default color.

Examples

ScanColor = Color.RED; // the red color ScanColor = new Color(255, 0, 0); // also the red color

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Speed

The current speed measured in units per turn. If the speed is positive, the bot moves forward. If negative, the bot moves backward. Zero speed means that the bot is not moving from its current position.

Declaration

public double Speed { get; }

Property Value

Type	Description
double	The current speed.

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TargetSpeed

Set or get the target speed for the bot in units per turn. The target speed is the speed you want to achieve eventually, which could take one to several turns depending on the current speed. For example, if the bot is moving forward with max speed, and then must change to move backward at full speed, the bot will have to first decelerate/brake its positive speed (moving forward). When passing speed of zero, it will then have to accelerate back to achieve max negative speed.

note

Acceleration is 1 unit per turn and deceleration/braking is faster than acceleration as it is -2 unit per turn. Deceleration is negative as it is added to the speed and hence needs to be negative when slowing down.

note

The target speed is truncated to MaxSpeed if the target speed exceeds this value.

If this property is set multiple times, the last value set before Go() counts.

Declaration

public double TargetSpeed { get; set; }

Property Value

Type	Description
double	The target speed.

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TeammateIds

Returns the ids of all teammates.

Declaration

public ICollection<int> TeammateIds { get; }

Property Value

Type	Description
ICollection<int>	The ids of all teammates if the bot is participating in a team or an empty collection if the bot is not in a team.

TimeLeft

The number of microseconds left of this turn before the bot will skip the turn. Make sure to call Go() before the time runs out.

Declaration

public int TimeLeft { get; }

Property Value

Type	Description
int	The amount of time left in microseconds.

TracksColor

The color of the tracks. Colors can (only) be changed each turn.

Declaration

public Color? TracksColor { get; set; }

Property Value

Type	Description
Color?	Is the color of the tracks or `null` if the bot must use the default color.

Examples

TracksColor = Color.RED; // the red color TracksColor = new Color(255, 0, 0); // also the red color

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TurnNumber

Current turn number.

Declaration

public int TurnNumber { get; }

Property Value

Type	Description
int	The current turn number.

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TurnRate

Set or get the turn rate of the bot, which can be positive and negative. The turn rate is measured in degrees per turn. The turn rate is added to the current direction of the bot. But it is also added to the current direction of the gun and radar. This is because the gun is mounted on the body, and hence turns with the body. The radar is mounted on the gun and hence moves with the gun. You can compensate for the turn rate of the bot by subtracting the turn rate of the bot from the turn rate of the gun and radar. But be aware that the turn limits defined for the gun and radar cannot be exceeded.

The turn rate is truncated to MaxTurnRate if the turn rate exceeds this value.

If this property is set multiple times, the last value set before Go() counts.

Declaration

public virtual double TurnRate { get; set; }

Property Value

Type	Description
double	The turn rate of the bot

TurnTimeout

Turn timeout in microseconds (1 / 1,000,000 second). The turn timeout is important as the bot needs to take action by calling Go() before the turn timeout occurs. As soon as the TickEvent is triggered, i.e. when OnTick(TickEvent) is called, you need to call Go() to take action before the turn timeout occurs. Otherwise, your bot will skip a turn and receive a OnSkippedTurn(SkippedTurnEvent) for each turn where Go() is called too late.

First available when the game has started.

Declaration

public int TurnTimeout { get; }

Property Value

Type	Description
int	The turn timeout in microseconds.

TurretColor

The color of the gun turret. Colors can (only) be changed each turn.

Declaration

public Color? TurretColor { get; set; }

Property Value

Type	Description
Color?	Is the color of the gun turret or `null` if the bot must use the default color.

Examples

TurretColor = Color.RED; // the red color TurretColor = new Color(255, 0, 0); // also the red color

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Variant

The game variant, which is "Tank Royale".

Declaration

public string Variant { get; }

Property Value

Type	Description
string	The game variant of Robocode.

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Version

Game version, e.g. "1.0.0".

Declaration

public string Version { get; }

Property Value

Type	Description
string	The game version.

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X

Current X coordinate of the center of the bot.

Declaration

public double X { get; }

Property Value

Type	Description
double	Current X coordinate of the bot.

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Y

Current Y coordinate of the center of the bot.

Declaration

public double Y { get; }

Property Value

Type	Description
double	Current Y coordinate of the bot.

Methods

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AddCustomEvent(Condition)

Adds a event handler that will be automatically triggered OnCustomEvent(CustomEvent) when the Test() returns true.

Declaration

public bool AddCustomEvent(Condition condition)

Parameters

Type	Name	Description
Condition	condition	Is the condition that must be met to trigger the custom event.

Returns

Type	Description
bool

BearingTo(double, double)

Calculates the bearing (delta angle) between the bot´s coordinates and direction and the direction to the point x,y.

Declaration

public virtual double BearingTo(double x, double y)

Parameters

Type	Name	Description
double	x	Is the x coordinate of the point.
double	y	Is the y coordinate of the point.

Returns

Type	Description
double	The bearing to the point x,y in the range [-180,180[

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BroadcastTeamMessage(object)

Broadcasts a message to all teammates.

When the message is send, it is serialized into a JSON representation, meaning that all public fields, and only public fields, are being serialized into a JSON representation as a DTO (data transfer object).

The maximum team message size limit is defined by TeamMessageMaxSize. This size is the size of the message when it is serialized into a JSON representation.

The maximum number of messages that can be send/broadcast per turn is defined by MaxNumberOfTeamMessagesPerTurn.

Declaration

public void BroadcastTeamMessage(object message)

Parameters

Type	Name	Description
object	message	The message to broadcast.

Exceptions

Type	Condition
ArgumentException	if the size of the message exceeds the size limit.

CalcBearing(double)

Calculates the bearing (delta angle) between the input direction and the direction of this bot.

Declaration

public virtual double CalcBearing(double direction)

Parameters

Type	Name	Description
double	direction	Is the input direction to calculate the bearing from.

Returns

Type	Description
double	A bearing (delta angle) between the input direction and the direction of this bot. The bearing is a normalized angle in the range [-180,180[

CalcBulletSpeed(double)

Calculates the bullet speed given a fire power.

Declaration

public virtual double CalcBulletSpeed(double firepower)

Parameters

Type	Name	Description
double	firepower	Is the firepower.

Returns

Type	Description
double	The bullet speed determined by the given firepower.

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CalcDeltaAngle(double, double)

Calculates the difference between two angles, i.e. the number of degrees from a source angle to a target angle. The delta angle will be in the range [-180,180]

Declaration

public virtual double CalcDeltaAngle(double targetAngle, double sourceAngle)

Parameters

Type	Name	Description
double	targetAngle	Is the target angle.
double	sourceAngle	Is the source angle.

Returns

Type	Description
double	The delta angle between a source angle and target angle.

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CalcGunBearing(double)

Calculates the bearing (delta angle) between the input direction and the direction of the gun.

Declaration

public virtual double CalcGunBearing(double direction)

Parameters

Type	Name	Description
double	direction	Is the input direction to calculate the bearing from.

Returns

Type	Description
double	A bearing (delta angle) between the input direction and the direction of the gun. The bearing is a normalized angle in the range [-180,180[

CalcGunHeat(double)

Calculates gun heat after having fired the gun.

Declaration

public virtual double CalcGunHeat(double firepower)

Parameters

Type	Name	Description
double	firepower	Is the firepower used when firing the gun.

Returns

Type	Description
double	The gun heat produced when firing the gun with the given firepower.

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CalcMaxTurnRate(double)

Calculates the maximum turn rate for a specific speed.

Declaration

public double CalcMaxTurnRate(double speed)

Parameters

Type	Name	Description
double	speed	Is the speed.

Returns

Type	Description
double	The maximum turn rate determined by the given speed.

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CalcRadarBearing(double)

Calculates the bearing (delta angle) between the input direction and the direction of the radar.

Declaration

public virtual double CalcRadarBearing(double direction)

Parameters

Type	Name	Description
double	direction	Is the input direction to calculate the bearing from.

Returns

Type	Description
double	A bearing (delta angle) between the input direction and the direction of the radar. The bearing is a normalized angle in the range [-180,180[

ClearEvents()

Clears out any pending events in the bot's event queue immediately.

Declaration

public void ClearEvents()

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DirectionTo(double, double)

Calculates the direction (angle) from the bot´s coordinates to a point x,y.

Declaration

public virtual double DirectionTo(double x, double y)

Parameters

Type	Name	Description
double	x	Is the x coordinate of the point.
double	y	Is the y coordinate of the point.

Returns

Type	Description
double	The direction to the point x,y in the range [0,360[

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DistanceTo(double, double)

Calculates the distance from the bot´s coordinates to a point x,y.

Declaration

public virtual double DistanceTo(double x, double y)

Parameters

Type	Name	Description
double	x	Is the x coordinate of the point.
double	y	Is the y coordinate of the point.

Returns

Type	Description
double	The distance to the point x,y.

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GetEventPriority(Type)

Returns the event priority for a specific event class.

Declaration

public virtual int GetEventPriority(Type eventType)

Parameters

Type	Name	Description
Type	eventType	Event type to get the event priority for.

Returns

Type	Description
int	The event priority for a specific event class.

Examples

Example:

int scannedBotEventPriority = GetPriority(ScannedBotEvent.GetType());

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Go()

Commits the current commands (actions), which finalizes the current turn for the bot.

This method must be called once per turn to send the bot actions to the server and must be called before the turn timeout occurs. A turn timer is started when the GameStartedEvent and TickEvent occurs. If the Go() method is called too late,a turn timeout will occur and the SkippedTurnEvent will occur, which means that the bot has skipped all actions for the last turn. In this case, the server will continue executing the last actions received. This could be fatal for the bot due to loss of control over the bot. So make sure that Go() is called before the turn ends.

The commands executed when Go() is called are set by setting these properties prior to calling the Go() method: TurnRate, GunTurnRate, RadarTurnRate, TargetSpeed, and SetFire(double).

Declaration

public void Go()

GunBearingTo(double, double)

Calculates the bearing (delta angle) between the bot´s gun and direction and the direction to the point x,y.

Declaration

public virtual double GunBearingTo(double x, double y)

Parameters

Type	Name	Description
double	x	Is the x coordinate of the point.
double	y	Is the y coordinate of the point.

Returns

Type	Description
double	The bearing to the point x,y in the range [-180,180[

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IsTeammate(int)

Checks if the provided bot id is a teammate or not.

Declaration

public bool IsTeammate(int botId)

Parameters

Type	Name	Description
int	botId	The id of the bot to check for

Returns

Type	Description
bool	`true` if the provided is id an id of a teammate; `false` otherwise.

Examples

Example:

public override void OnScannedBot(ScannedBotEvent e)
{
    if (IsTeammate(e.ScannedBotId)
    {
        return; // don't do anything by leaving
    }
    Fire(1);
}

NormalizeAbsoluteAngle(double)

Normalizes an angle to an absolute angle into the range [0,360[

Declaration

public virtual double NormalizeAbsoluteAngle(double angle)

Parameters

Type	Name	Description
double	angle	Is the angle to normalize.

Returns

Type	Description
double	The normalized absolute angle.

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NormalizeRelativeAngle(double)

Normalizes an angle to an relative angle into the range [-180,180[

Declaration

public virtual double NormalizeRelativeAngle(double angle)

Parameters

Type	Name	Description
double	angle	Is the angle to normalize.

Returns

Type	Description
double	The normalized relative angle.

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OnBotDeath(BotDeathEvent)

The event handler triggered when another bot has died.

Declaration

public virtual void OnBotDeath(BotDeathEvent botDeathEvent)

Parameters

Type	Name	Description
BotDeathEvent	botDeathEvent	Event details from the game.

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OnBulletFired(BulletFiredEvent)

The event handler triggered when the bot has fired a bullet.

Declaration

public virtual void OnBulletFired(BulletFiredEvent bulletFiredEvent)

Parameters

Type	Name	Description
BulletFiredEvent	bulletFiredEvent	Event details from the game.

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OnBulletHit(BulletHitBotEvent)

The event handler triggered when the bot has hit another bot with a bullet.

Declaration

public virtual void OnBulletHit(BulletHitBotEvent bulletHitBotEvent)

Parameters

Type	Name	Description
BulletHitBotEvent	bulletHitBotEvent	Event details from the game.

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OnBulletHitBullet(BulletHitBulletEvent)

The event handler triggered when a bullet fired from the bot has collided with another bullet.

Declaration

public virtual void OnBulletHitBullet(BulletHitBulletEvent bulletHitBulletEvent)

Parameters

Type	Name	Description
BulletHitBulletEvent	bulletHitBulletEvent	Event details from the game.

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OnBulletHitWall(BulletHitWallEvent)

The event handler triggered when a bullet has hit a wall.

Declaration

public virtual void OnBulletHitWall(BulletHitWallEvent bulletHitWallEvent)

Parameters

Type	Name	Description
BulletHitWallEvent	bulletHitWallEvent	Event details from the game.

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OnConnected(ConnectedEvent)

The event handler triggered when connected to the server.

Declaration

public virtual void OnConnected(ConnectedEvent connectedEvent)

Parameters

Type	Name	Description
ConnectedEvent	connectedEvent	Event details from the game.

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OnConnectionError(ConnectionErrorEvent)

The event handler triggered when a connection error occurs.

Declaration

public virtual void OnConnectionError(ConnectionErrorEvent connectionErrorEvent)

Parameters

Type	Name	Description
ConnectionErrorEvent	connectionErrorEvent	Event details from the game.

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OnCustomEvent(CustomEvent)

The event handler triggered when some condition has been met. Use the Name of the condition when you need to differentiate between different types of conditions received with this event handler.

Declaration

public virtual void OnCustomEvent(CustomEvent customEvent)

Parameters

Type	Name	Description
CustomEvent	customEvent	Event details from the game.

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OnDeath(DeathEvent)

The event handler triggered when this bot has died.

Declaration

public virtual void OnDeath(DeathEvent botDeathEvent)

Parameters

Type	Name	Description
DeathEvent	botDeathEvent

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OnDisconnected(DisconnectedEvent)

The event handler triggered when disconnected from the server.

Declaration

public virtual void OnDisconnected(DisconnectedEvent disconnectedEvent)

Parameters

Type	Name	Description
DisconnectedEvent	disconnectedEvent	Event details from the game.

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OnGameEnded(GameEndedEvent)

The event handler triggered when the game has ended.

Declaration

public virtual void OnGameEnded(GameEndedEvent gameEndedEvent)

Parameters

Type	Name	Description
GameEndedEvent	gameEndedEvent	Event details from the game.

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OnGameStarted(GameStartedEvent)

The event handler triggered when the game has started.

Declaration

public virtual void OnGameStarted(GameStartedEvent gameStatedEvent)

Parameters

Type	Name	Description
GameStartedEvent	gameStatedEvent	Event details from the game.

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OnHitBot(HitBotEvent)

The event handler triggered when the bot has collided with another bot.

Declaration

public virtual void OnHitBot(HitBotEvent botHitBotEvent)

Parameters

Type	Name	Description
HitBotEvent	botHitBotEvent	Event details from the game.

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OnHitByBullet(HitByBulletEvent)

The event handler triggered when the bot has been hit by a bullet.

Declaration

public virtual void OnHitByBullet(HitByBulletEvent bulletHitBotEvent)

Parameters

Type	Name	Description
HitByBulletEvent	bulletHitBotEvent

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OnHitWall(HitWallEvent)

The event handler triggered when the bot has hit a wall.

Declaration

public virtual void OnHitWall(HitWallEvent botHitWallEvent)

Parameters

Type	Name	Description
HitWallEvent	botHitWallEvent	Event details from the game.

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OnRoundEnded(RoundEndedEvent)

The event handler triggered when a round has ended.

Declaration

public virtual void OnRoundEnded(RoundEndedEvent roundEndedEvent)

Parameters

Type	Name	Description
RoundEndedEvent	roundEndedEvent	Event details from the game.

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OnRoundStarted(RoundStartedEvent)

The event handler triggered when a new round has started.

Declaration

public virtual void OnRoundStarted(RoundStartedEvent roundStatedEvent)

Parameters

Type	Name	Description
RoundStartedEvent	roundStatedEvent

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OnScannedBot(ScannedBotEvent)

The event handler triggered when the bot has scanned another bot.

Declaration

public virtual void OnScannedBot(ScannedBotEvent scannedBotEvent)

Parameters

Type	Name	Description
ScannedBotEvent	scannedBotEvent	Event details from the game.

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OnSkippedTurn(SkippedTurnEvent)

The event handler triggered when the bot has skipped a turn. This event occurs if the bot did not take any action in a specific turn. That is, Go() was not called before the turn timeout occurred for the turn. If the bot does not take action for multiple turns in a row, it will receive a SkippedTurnEvent for each turn where it did not take action. When the bot is skipping a turn, the server did not receive the message from the bot, and the server will use the newest received instructions for target speed, turn rates, firing, etc.

Declaration

public virtual void OnSkippedTurn(SkippedTurnEvent skippedTurnEvent)

Parameters

Type	Name	Description
SkippedTurnEvent	skippedTurnEvent	Event details from the game.

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OnTeamMessage(TeamMessageEvent)

The event handler triggered when the bot has received a message from a teammate.

Declaration

public virtual void OnTeamMessage(TeamMessageEvent teamMessageEvent)

Parameters

Type	Name	Description
TeamMessageEvent	teamMessageEvent	Event details from the game.

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OnTick(TickEvent)

The event handler triggered when a game tick event occurs, i.e., when a new turn in a round has started. When this handler is triggered, your bot must figure out the next action to take and call Go() when it needs to commit the action to the server.

Declaration

public virtual void OnTick(TickEvent tickEvent)

Parameters

Type	Name	Description
TickEvent	tickEvent	Event details from the game.

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OnWonRound(WonRoundEvent)

The event handler triggered when the bot has won a round.

Declaration

public virtual void OnWonRound(WonRoundEvent wonRoundEvent)

Parameters

Type	Name	Description
WonRoundEvent	wonRoundEvent	Event details from the game.

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RadarBearingTo(double, double)

Calculates the bearing (delta angle) between the bot´s radar and direction and the direction to the point x,y.

Declaration

public virtual double RadarBearingTo(double x, double y)

Parameters

Type	Name	Description
double	x	Is the x coordinate of the point.
double	y	Is the y coordinate of the point.

Returns

Type	Description
double	The bearing to the point x,y in the range [-180,180[

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RemoveCustomEvent(Condition)

Removes triggering an custom event handler for a specific condition that was previously added with AddCustomEvent(Condition).

Declaration

public bool RemoveCustomEvent(Condition condition)

Parameters

Type	Name	Description
Condition	condition	is the condition that was previously added with AddCustomEvent(Condition)

Returns

Type	Description
bool

SendTeamMessage(int, object)

Sends a message to a specific teammate.

The maximum team message size limit is defined by TeamMessageMaxSize. This size is the size of the message when it is serialized into a JSON representation.

The maximum number of messages that can be send/broadcast per turn is defined by MaxNumberOfTeamMessagesPerTurn.

Declaration

public void SendTeamMessage(int teammateId, object message)

Parameters

Type	Name	Description
int	teammateId	The id of the teammate to send the message to.
object	message	The message to broadcast.

Exceptions

Type	Condition
ArgumentException	if the size of the message exceeds the size limit.

SetEventPriority(Type, int)

Changes the event priority for an event class. The event priority is used for determining which event types (classes) that must be fired and handled before others. Events with higher priorities will be handled before events with lower priorities.

Declaration

public virtual void SetEventPriority(Type eventType, int priority)

Parameters

Type	Name	Description
Type	eventType	Event type to change the event priority for.
int	priority	The new priority. Typically, a positive number from 1 to 150. The greater value, the higher priority.

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SetFire(double)

Sets the gun to fire in the direction that the gun is pointing with the specified firepower.

Firepower is the amount of energy your bot will spend on firing the gun. This means that the bot will lose power on firing the gun where the energy loss is equal to the firepower. You cannot spend more energy than available from your bot.

The bullet power must be greater than MinFirepower and the gun heat zero before the gun can fire.

If the bullet hits an opponent bot, you will gain energy from the bullet hit.When hitting another bot, your bot will be rewarded and retrieve an energy boost of 3x firepower.

The gun will only fire when the firepower is at MinFirepower or higher. If the firepower is more thanMaxFirepower the power will be truncated to the max firepower.

Whenever the gun is fired, the gun is heated and needs to cool down before it can fire again. The gun heat must be zero before the gun is able to fire (see GunHeat. The gun heat generated by firing the gun is 1 + (firepower / 5). Hence, the more firepower used the longer it takes to cool down the gun. The gun cooling rate can be read by calling GunCoolingRate.

The amount of energy used for firing the gun is subtracted from the bot´s total energy. The amount of damage dealt by a bullet hitting another bot is 4x firepower, and if the firepower is greater than 1 it will do an additional 2 x (firepower - 1) damage.

note

The gun will automatically keep firing at any turn as soon as the gun heat reaches zero. It is possible to disable the gun firing by setting the firepower to zero.

The firepower is truncated to 0 and MaxFirepower if the firepower exceeds this value.

If this property is set multiple times, the last value set before Go() counts.

Declaration

public bool SetFire(double firepower)

Parameters

Type	Name	Description
double	firepower	The new firepower.

Returns

Type	Description
bool	`true` if the cannon can fire, i.e. if there is no gun heat; `false` otherwise.

SetFireAssist(bool)

Enables or disables fire assistance explicitly. Fire assistance is useful for bots with limited aiming capabilities as it will help the bot by firing directly at a scanned bot when the gun is fired, which is a very simple aiming strategy.

When fire assistance is enabled the gun will fire directly towards the center of the scanned bot when all these conditions are met:

The gun is fired SetFire(double) and Fire(double)
The radar is scanning a bot when firing the gun (OnScannedBot(ScannedBotEvent), SetRescan(), Rescan())
The gun and radar are pointing in the exact the same direction. You can set AdjustRadarForGunTurn=false to align the gun and radar and make sure not to turn the radar beside the gun.

The fire assistance feature is provided for backwards compatibility with the original Robocode, where robots that are not an AdvancedRobot got fire assistance per default as the gun and radar cannot be moved independently of each other. (The AdvancedRobot allows the body, gun, and radar to move independent of each other).

Declaration

public void SetFireAssist(bool enable)

Parameters

Type	Name	Description
bool	enable	Enables fire assistance when set to `true`, and disable fire assistance otherwise.

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SetRescan()

Sets the bot to rescan with the radar. This method is useful if the radar has not turned, and hence will not automatically scan bots. The last radar direction and sweep angle will be used for scanning for bots.

Declaration

public void SetRescan()

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SetResume()

Sets the bot to scan (again) with the radar. This method is useful if the radar has not been turning and thereby will not be able to automatically scan bots. This method is useful when the bot movement has stopped, e.g. when Stop() has been called. The last radar direction and sweep angle will be used for rescanning for bots.

Declaration

public void SetResume()

SetStop()

Set the bot to stop all movement including turning the gun and radar. The remaining movement is saved for a call to SetResume(). This method has no effect, if it has already been called.

Declaration

public void SetStop()

SetStop(bool)

Set the bot to stop all movement including turning the gun and radar. The remaining movement is saved for a call to SetResume().

Declaration

public void SetStop(bool overwrite)

Parameters

Type	Name	Description
bool	overwrite	overwrite is set to `true` if the movement saved by a previous call to this method or SetStop() must be overridden with the current movement. When set to `false` this method is identical to SetStop().

Start()

The method used to start running the bot. You should call this method from the main method or similar.

Declaration

public void Start()

Examples

This sample shows how to call the Start() method.

static void Main(string[] args)
{
    // create myBot
    ...
    myBot.Start();
}

Implements

IBaseBot

Class BaseBot

Inheritance

Implements

Inherited Members

Namespace: Robocode.TankRoyale.BotApi

Assembly: api.dll

Syntax

Constructors

BaseBot()

Declaration

Examples

BaseBot(BotInfo)

Declaration

Parameters

BaseBot(BotInfo, Uri)

Declaration

Parameters

BaseBot(BotInfo, Uri, string)

Declaration

Parameters

Properties

AdjustGunForBodyTurn

note

Declaration

Property Value

See Also

AdjustRadarForBodyTurn

note

Declaration

Property Value

See Also

AdjustRadarForGunTurn

note

note

Declaration

Property Value

See Also

ArenaHeight

Declaration

Property Value

ArenaWidth

Declaration

Property Value

BodyColor

Declaration

Property Value

Examples

BulletColor

Declaration

Property Value

Examples

BulletStates

Declaration

Property Value

Direction

Declaration

Property Value

EnemyCount

Declaration

Property Value

Energy

Declaration

Property Value

Events

Declaration

Property Value

Firepower

Declaration

Property Value

GameType

Declaration

Property Value

Graphics

Declaration

Property Value

Examples

GunColor

Declaration

Property Value

Examples