burlap.domain.singleagent.lunarlander

Class LunarLanderModel

java.lang.Object

burlap.domain.singleagent.lunarlander.LunarLanderModel

All Implemented Interfaces:

FullStateModel, SampleStateModel

public class LunarLanderModel
extends java.lang.Object
implements FullStateModel

Author:

James MacGlashan.

Nested Class Summary

Nested classes/interfaces inherited from interface burlap.mdp.singleagent.model.statemodel.FullStateModel

FullStateModel.Helper

Constructor Summary

Constructors

Constructor and Description
LunarLanderModel(LunarLanderDomain.LLPhysicsParams physParams)

Method Summary

Modifier and Type	Method and Description
protected void	incAngle(LLState s, double dir) Turns the lander in the direction indicated by the domains defined change in angle for turn actions.
State	sample(State s, Action a) Samples and returns a State from a state transition function.
java.util.List<StateTransitionProb>	stateTransitions(State s, Action a) Returns the set of possible transitions when Action is applied in State s.
protected void	updateMotion(LLState s, double thrust) Updates the position of the agent/lander given the provided thrust force that has been exerted

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

LunarLanderModel

public LunarLanderModel(LunarLanderDomain.LLPhysicsParams physParams)

Method Detail

stateTransitions

public java.util.List<StateTransitionProb> stateTransitions(State s,
                                                            Action a)

Description copied from interface: FullStateModel

Returns the set of possible transitions when Action is applied in State s. The returned list only needs to include transitions that have non-zero probability of occurring.

Specified by:

stateTransitions in interface FullStateModel

Parameters:

s - the source state

a - the action to be applied in the source state

Returns:

the probability distribution of the state transition function specified as a list of StateTransitionProb objects.

sample

public State sample(State s,
                    Action a)

Description copied from interface: SampleStateModel

Samples and returns a State from a state transition function.

Specified by:

sample in interface SampleStateModel

Parameters:

s - the source state

a - the action to be executed in the source state

Returns:

a sample State

incAngle

protected void incAngle(LLState s,
                        double dir)

Turns the lander in the direction indicated by the domains defined change in angle for turn actions.

Parameters:

s - the state in which the lander's angle should be changed

dir - the direction to turn; +1 is clockwise, -1 is counterclockwise

updateMotion

protected void updateMotion(LLState s,
                            double thrust)

Updates the position of the agent/lander given the provided thrust force that has been exerted

Parameters:

s - the state in which the agent/lander should be modified

thrust - the amount of thrust force exerted by the lander.