com.corajr.loom.mappings

Class TurtleState

java.lang.Object

com.corajr.loom.mappings.TurtleState

public class TurtleState
extends Object

Stores both the current PositionHeading and a stack of previous PositionHeadings for a Turtle.

Author:

corajr

Field Summary

Fields

Modifier and Type	Field and Description
static PositionHeading	DEFAULT_POSITION

Constructor Summary

Constructors

Constructor and Description
TurtleState(PositionHeading positionHeading, BlockingDeque<PositionHeading> posStack) Creates a new TurtleState (immutable).

Method Summary

Modifier and Type	Method and Description
static TurtleState	defaultState() Returns a TurtleState which starts at (0,0), pointing to 0.0 radians, and has an empty PositionHeading stack.
float	getAngle() Get the current angle of the turtle in radians.
processing.core.PVector	getPosition() Get the current position of the turtle as a PVector.
TurtleState	move(float dist) Moves the turtle along the current heading by a specified distance.
TurtleState	popPositionHeading() Pop a PositionHeading off the top of the stack.
TurtleState	pushPositionHeading() Push the current PositionHeading onto the stack.
TurtleState	turn(float angle) Turns the turtle by the specified angle in radians.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_POSITION

public static final PositionHeading DEFAULT_POSITION

Constructor Detail

TurtleState

public TurtleState(PositionHeading positionHeading,
                   BlockingDeque<PositionHeading> posStack)

Creates a new TurtleState (immutable).

Parameters:

positionHeading - the position and heading to start from

posStack - a stack of positions/headings

Method Detail

getPosition

public processing.core.PVector getPosition()

Get the current position of the turtle as a PVector.

Returns:

the position

getAngle

public float getAngle()

Get the current angle of the turtle in radians.

Returns:

the angle in radians

move

public TurtleState move(float dist)

Moves the turtle along the current heading by a specified distance.

Parameters:

dist - the distance to move

Returns:

the updated state

turn

public TurtleState turn(float angle)

Turns the turtle by the specified angle in radians.

Parameters:

angle - the angle to turn by

Returns:

the updated state

pushPositionHeading

public TurtleState pushPositionHeading()

Push the current PositionHeading onto the stack.

Returns:

the updated state

popPositionHeading

public TurtleState popPositionHeading()

Pop a PositionHeading off the top of the stack.

Returns:

the updated state

defaultState

public static TurtleState defaultState()

Returns a TurtleState which starts at (0,0), pointing to 0.0 radians, and has an empty PositionHeading stack.

Returns:

a default turtle state