Package microsim.space.turtle
Class Turtle
- java.lang.Object
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- microsim.space.SpacePosition
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- microsim.space.turtle.AbstractTurtle
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- microsim.space.turtle.Turtle
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- All Implemented Interfaces:
java.io.Serializable
,java.lang.Comparable<SpacePosition>
@MappedSuperclass public class Turtle extends AbstractTurtle
An agent able to move itself upon an object grid. It has got some specific instruction for movement. Each turtle has an heading expressed in degrees. It can make steps, turn right or left, measure the distance from another position on the grid. Each turtle has a color and it is able to draw itself on a grid drawing layer.Title: JAS
Description: Java Agent-based Simulation library
Copyright (C) 2002 Michele Sonnessa
This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.- Author:
- Michele Sonnessa
- See Also:
- Serialized Form
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Nested Class Summary
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Nested classes/interfaces inherited from class microsim.space.turtle.AbstractTurtle
AbstractTurtle.Direction, AbstractTurtle.MoveMode
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Constructor Summary
Constructors Constructor Description Turtle()
Turtle(ObjectSpace grid)
Create a turtle with a given identifier on the given grid at position (0,0).Turtle(ObjectSpace grid, int x, int y)
Create a turtle with a given identifier on the given grid at the given position.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
forward(int steps)
Make some steps forward, according the current heading.int
getHeading()
Return the current heading of the turtle.int
getNextX(int steps)
Return the new x coordinate walking the current heading direction for given steps.int
getNextY(int steps)
Return the new y coordinate walking the current heading direction for given steps.boolean
leap(int steps)
Make some steps forward, but moves only if the target position is empty.void
setCardinalHeading(AbstractTurtle.Direction directionType)
Set the turtle's heading using a constant for cardinal points.void
setHeading(int heading)
Set the current heading.void
setRandomHeading()
Randomize the turtle's heading.void
setXY(int x, int y)
Set a new position.void
turnCardinalLeft(int steps)
void
turnCardinalRight(int steps)
void
turnLeft(int degrees)
Change the current heading rotating it to the left.void
turnRight(int degrees)
Change the current heading rotating it to the right.-
Methods inherited from class microsim.space.turtle.AbstractTurtle
forward, getDistanceFrom, getGrid, getMovingType, getNextX, getNextY, getPosition, getWorldHeight, getWorldWidth, getX, getY, leap, setGrid, setIfEmptyXY, setMovingType, setX, setY
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Methods inherited from class microsim.space.SpacePosition
compareTo, equals, toString
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Constructor Detail
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Turtle
public Turtle()
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Turtle
public Turtle(ObjectSpace grid)
Create a turtle with a given identifier on the given grid at position (0,0).- Parameters:
id
- The identifier for turtle.grid
- The grid upon the turtle moves.
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Turtle
public Turtle(ObjectSpace grid, int x, int y)
Create a turtle with a given identifier on the given grid at the given position.- Parameters:
id
- The identifier for turtle.x
- The initial x coordinate of the turtle.y
- The initial y coordinate of the turtle.grid
- The grid upon the turtle moves.
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Method Detail
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getHeading
public int getHeading()
Description copied from class:AbstractTurtle
Return the current heading of the turtle.- Specified by:
getHeading
in classAbstractTurtle
- Returns:
- The current heading.
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setRandomHeading
public void setRandomHeading()
Randomize the turtle's heading. It gets a random number from 0 to 359 degrees. The random generator is synchronized with JAS randomizer.- Specified by:
setRandomHeading
in classAbstractTurtle
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setCardinalHeading
public void setCardinalHeading(AbstractTurtle.Direction directionType)
Set the turtle's heading using a constant for cardinal points.- Specified by:
setCardinalHeading
in classAbstractTurtle
- Parameters:
directionType
- One of DIR_NORTH, DIR_NORTH_EAST, ... constant.
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setHeading
public void setHeading(int heading)
Set the current heading.- Specified by:
setHeading
in classAbstractTurtle
- Parameters:
heading
- The new heading.
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turnCardinalLeft
public void turnCardinalLeft(int steps)
- Specified by:
turnCardinalLeft
in classAbstractTurtle
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turnCardinalRight
public void turnCardinalRight(int steps)
- Specified by:
turnCardinalRight
in classAbstractTurtle
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turnRight
public void turnRight(int degrees)
Change the current heading rotating it to the right.- Specified by:
turnRight
in classAbstractTurtle
- Parameters:
degrees
- The number of degrees to rotate the heading.
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turnLeft
public void turnLeft(int degrees)
Change the current heading rotating it to the left.- Specified by:
turnLeft
in classAbstractTurtle
- Parameters:
degrees
- The number of degrees to rotate the heading.
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forward
public void forward(int steps)
Make some steps forward, according the current heading.- Specified by:
forward
in classAbstractTurtle
- Parameters:
steps
- The number of steps the turtle has to make.
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leap
public boolean leap(int steps)
Make some steps forward, but moves only if the target position is empty.- Specified by:
leap
in classAbstractTurtle
- Parameters:
steps
- The number of steps the turtle has to make.- Returns:
- True only if the turtle has moved.
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setXY
public void setXY(int x, int y)
Set a new position.- Overrides:
setXY
in classAbstractTurtle
- Parameters:
x
- The new x coordinate.y
- The new y coordinate.
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getNextX
public int getNextX(int steps)
Return the new x coordinate walking the current heading direction for given steps. It uses the grid bound checking methods according to the turtle's current moving type.- Specified by:
getNextX
in classAbstractTurtle
- Parameters:
steps
- The number of steps to move forward.- Returns:
- The candidate x coordinate.
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getNextY
public int getNextY(int steps)
Return the new y coordinate walking the current heading direction for given steps. It uses the grid bound checking methods according to the turtle's current moving type.- Specified by:
getNextY
in classAbstractTurtle
- Parameters:
steps
- The number of steps to move forward.- Returns:
- The candidate y coordinate.
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