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| /**
* File Name: Simulator.cs
*
* Date: 06/01/2006
*
* Copyright (c) 2006 Michael LaLena. All rights reserved. (www.lalena.com)
* Permission to use, copy, modify, and distribute this Program and its documentation,
* if any, for any purpose and without fee is hereby granted, provided that:
* (i) you not charge any fee for the Program, and the Program not be incorporated
* by you in any software or code for which compensation is expected or received;
* (ii) the copyright notice listed above appears in all copies;
* (iii) both the copyright notice and this Agreement appear in all supporting documentation; and
* (iv) the name of Michael LaLena or lalena.com not be used in advertising or publicity
* pertaining to distribution of the Program without specific, written prior permission.
*/
package Flock;
import java.awt.*;
import java.applet.*;
import java.util.Vector;
/**
* This class
*
* @author Michael LaLena
* @version 1.0
*/
public class Simulator extends java.applet.Applet implements Runnable {
// This class holds the birds and controls their movement.
Flock flock;
// Thread for moving the birds
Thread thread;
// Canvas that displays the birds moving around
SimulatorCanvas canvas;
// Panel containing all the sliders that control the birds
Panel controls;
// These are the upper limits for the sliders
final int MAXIMUM_BIRDS = 50;
final int MAXIMUM_SPEED = 30;
final int MAXIMUM_HUNGER = 10;
final int MAXIMUM_DISTANCE = 200;
// These are the default values for the sliders, also used for a reset
int DEFAULT_NUMBER_GREEN = 10;
int DEFAULT_NUMBER_BLUE = 15;
int DEFAULT_NUMBER_RED = 3;
int DEFAULT_GREEN_THETA = 15;
int DEFAULT_BLUE_THETA = 10;
int DEFAULT_RED_THETA = 20;
int DEFAULT_GREEN_SPEED = 5;
int DEFAULT_BLUE_SPEED = 6;
int DEFAULT_RED_SPEED = 7;
int DEFAULT_RED_HUNGER = 3;
int DEFAULT_OBSTACLE_SEPARATE = 30;
int DEFAULT_OBSTACLE_DETECT = 60;
// These are the values set by the sliders
int numberOfGreenBirds;
int numberOfBlueBirds;
int numberOfRedPredators;
int greenBirdSpeed;
int blueBirdSpeed;
int redPredatorSpeed;
int greenBirdMaxTheta;
int blueBirdMaxTheta;
int redPredatorMaxTheta;
int redPredatorHunger;
int separateDistance;
int detectDistance;
// These are the scrollbar sliders themselves
Scrollbar greenNumberBirdsScrollbar = new Scrollbar(Scrollbar.HORIZONTAL);
Scrollbar blueNumberBirdsScrollbar = new Scrollbar(Scrollbar.HORIZONTAL);
Scrollbar redNumberPredatorsScrollbar = new Scrollbar(Scrollbar.HORIZONTAL);
Scrollbar greenMaxThetaScrollbar = new Scrollbar(Scrollbar.HORIZONTAL);
Scrollbar blueMaxThetaScrollbar = new Scrollbar(Scrollbar.HORIZONTAL);
Scrollbar redMaxThetaScrollbar = new Scrollbar(Scrollbar.HORIZONTAL);
Scrollbar greenSpeedScrollbar = new Scrollbar(Scrollbar.HORIZONTAL);
Scrollbar blueSpeedScrollbar = new Scrollbar(Scrollbar.HORIZONTAL);
Scrollbar redSpeedScrollbar = new Scrollbar(Scrollbar.HORIZONTAL);
Scrollbar redHungerScrollbar = new Scrollbar(Scrollbar.HORIZONTAL);
Scrollbar detectScrollbar = new Scrollbar(Scrollbar.HORIZONTAL);
Scrollbar separateScrollbar = new Scrollbar(Scrollbar.HORIZONTAL);
// Top Title Bar
Label titleLabel = new Label( "Flocking Simulator by Michael LaLena (www.lalena.com)" );
// These are the labels on the sliders
Label controlsLabel = new Label( "Controls" );
Label blueLabel = new Label( "Blue Birds" );
Label greenLabel = new Label( "Green Birds" );
Label redLabel = new Label( "Red Predators" );
Label speedLabel = new Label( "Speed" );
Label turnLabel = new Label( "Max Turn" );
Label numberBirdsLabel = new Label( "Number Birds" );
Label redHungerLabel = new Label( "Predator Hunger" );
Label detectLabel = new Label( "Detection Distance" );
Label separateLabel = new Label( "Separate To Avoid Dist" );
// The reset button
Button resetButton = new Button( "Reset" );
// Checking this checkbox will show the detect and separation ranges for each bird
Checkbox showRangesCheckbox = new Checkbox( "Show Dist Ranges" );
/**
* This is the java init function.
* This creates the canvas, the sliders, and the flock of birds.
*/
public void init() {
this.resize(500, 500);
canvas = new SimulatorCanvas();
canvas.simulator = this;
controls = new Panel();
addControls();
resetValues();
setLayout(new BorderLayout());
titleLabel.setAlignment(Label.CENTER);
add("Center", canvas);
add("South", titleLabel);
add("North", controls);
canvas.requestFocus();
Bird.setMapSize(canvas.getSize()); // set swarm boundaries
Flock.setMapSize(canvas.getSize());
}
/**
* This will reset the user configurable parameters that control the birds.
* It will reset the slider values and the flock object.
*/
public void resetValues() {
numberOfGreenBirds = DEFAULT_NUMBER_GREEN;
numberOfBlueBirds = DEFAULT_NUMBER_BLUE;
numberOfRedPredators = DEFAULT_NUMBER_RED;
greenBirdMaxTheta = DEFAULT_GREEN_THETA;
blueBirdMaxTheta = DEFAULT_BLUE_THETA;
redPredatorMaxTheta = DEFAULT_RED_THETA;
greenBirdSpeed = DEFAULT_GREEN_SPEED;
blueBirdSpeed = DEFAULT_BLUE_SPEED;
redPredatorSpeed = DEFAULT_RED_SPEED;
redPredatorHunger = DEFAULT_RED_HUNGER;
separateDistance = DEFAULT_OBSTACLE_SEPARATE;
detectDistance = DEFAULT_OBSTACLE_DETECT;
setControlValues();
Bird.SeparationRange = separateDistance;
Bird.DetectionRange = detectDistance;
flock = new Flock();
Flock.SeparationRange = separateDistance;
Flock.DetectionRange = detectDistance;
for (int i=0; i < numberOfGreenBirds; i++) {
Bird bird = new Bird(Color.green);
bird.setSpeed( greenBirdSpeed );
bird.setMaxTurnTheta( greenBirdMaxTheta );
flock.addBird(bird);
}
for (int i=0; i < numberOfBlueBirds; i++) {
Bird bird = new Bird(Color.blue);
bird.setSpeed( blueBirdSpeed );
bird.setMaxTurnTheta( blueBirdMaxTheta );
flock.addBird(bird);
}
for (int i=0; i < numberOfRedPredators; i++) {
Predator bird = new Predator();
bird.setSpeed( redPredatorSpeed );
bird.setMaxTurnTheta( redPredatorMaxTheta );
bird.setHunger( redPredatorHunger );
flock.addBird(bird);
}
}
/**
* This is the java applet start function.
* It starts the thread that controls the brids.
*/
public void start() {
if (thread == null) {
thread = new Thread(this);
thread.start();
}
}
/**
* This is the java applet stop function.
* It stops the thread that controls the brids.
*/
public void stop() {
if (thread != null) {
thread.stop();
thread = null;
}
}
/**
* This is the java applet run function.
* It loops forever moving the birds and predators, and controls the logic
* when a bird or predator is removed.
*/
public void run() {
while (true) {
Bird.setMapSize(canvas.getSize());
Flock.setMapSize(canvas.getSize());
Vector removedBirds = flock.move();
for ( int i = 0; i < removedBirds.size(); i++ ) {
Bird bird = (Bird)removedBirds.elementAt(i);
if ( bird.getColor().equals( Color.red )) {
numberOfRedPredators = redNumberPredatorsScrollbar.getValue() - 1;
redNumberPredatorsScrollbar.setValue( numberOfRedPredators );
}
else if ( bird.getColor().equals( Color.blue )) {
numberOfBlueBirds = blueNumberBirdsScrollbar.getValue() - 1;
blueNumberBirdsScrollbar.setValue( numberOfBlueBirds );
}
else if ( bird.getColor().equals( Color.green )) {
numberOfGreenBirds = greenNumberBirdsScrollbar.getValue() - 1;
greenNumberBirdsScrollbar.setValue( numberOfGreenBirds );
}
}
canvas.validate();
canvas.setVisible(true);
canvas.repaint();
canvas.invalidate();
invalidate();
repaint();
this.repaint( canvas.getLocation().x, canvas.getLocation().y, canvas.getSize().width, canvas.getSize().height);
try {
Thread.sleep(20); // interval between steps
} catch (InterruptedException e) {}
}
}
/**
* This event is fired when a user changes one of the panel parameters.
*
* @param ev The event parameters
*/
public boolean handleEvent(Event ev) { // check for control panel actions
if (ev.target == greenNumberBirdsScrollbar) {
if (greenNumberBirdsScrollbar.getValue() < numberOfGreenBirds ) {
for ( int i = 0; i < numberOfGreenBirds - greenNumberBirdsScrollbar.getValue(); i++ ) {
flock.removeBird(Color.green);
}
}
else {
for ( int i = 0; i < greenNumberBirdsScrollbar.getValue() - numberOfGreenBirds; i++ ) {
Bird b = new Bird(Color.green);
b.setSpeed( greenBirdSpeed );
b.setMaxTurnTheta( greenBirdMaxTheta );
flock.addBird(b);
}
}
numberOfGreenBirds = greenNumberBirdsScrollbar.getValue();
}
else if (ev.target == blueNumberBirdsScrollbar) {
if (blueNumberBirdsScrollbar.getValue() < numberOfBlueBirds ) {
for ( int i = 0; i < numberOfBlueBirds - blueNumberBirdsScrollbar.getValue(); i++ ) {
flock.removeBird(Color.blue);
}
}
else {
for ( int i = 0; i < blueNumberBirdsScrollbar.getValue() - numberOfBlueBirds; i++ ) {
Bird b = new Bird(Color.blue);
b.setSpeed( blueBirdSpeed );
b.setMaxTurnTheta( blueBirdMaxTheta );
flock.addBird(b);
}
}
numberOfBlueBirds = blueNumberBirdsScrollbar.getValue();
}
else if (ev.target == redNumberPredatorsScrollbar) {
if (redNumberPredatorsScrollbar.getValue() < numberOfRedPredators ) {
for ( int i = 0; i < numberOfRedPredators - redNumberPredatorsScrollbar.getValue(); i++ ) {
flock.removeBird(Color.red);
}
}
else {
for ( int i = 0; i < redNumberPredatorsScrollbar.getValue() - numberOfRedPredators; i++ ) {
Predator b = new Predator();
b.setSpeed( redPredatorSpeed );
b.setMaxTurnTheta( redPredatorMaxTheta );
b.setHunger( redPredatorHunger );
flock.addBird(b);
}
}
numberOfRedPredators = redNumberPredatorsScrollbar.getValue();
}
else if ((ev.target == greenSpeedScrollbar) || (ev.target == greenMaxThetaScrollbar)) {
greenBirdSpeed = greenSpeedScrollbar.getValue();
greenBirdMaxTheta = greenMaxThetaScrollbar.getValue();
flock.setBirdParameters(Color.green, greenBirdSpeed, greenBirdMaxTheta);
return true;
}
else if ((ev.target == blueSpeedScrollbar ) || (ev.target == blueMaxThetaScrollbar )) {
blueBirdSpeed = blueSpeedScrollbar.getValue();
blueBirdMaxTheta = blueMaxThetaScrollbar.getValue();
flock.setBirdParameters(Color.blue, blueBirdSpeed, blueBirdMaxTheta);
}
else if ((ev.target == redSpeedScrollbar ) || (ev.target == redMaxThetaScrollbar ) || (ev.target == redHungerScrollbar )) {
redPredatorSpeed = redSpeedScrollbar.getValue();
redPredatorMaxTheta = redMaxThetaScrollbar.getValue();
redPredatorHunger = redHungerScrollbar.getValue();
flock.setBirdParameters(Color.red, redPredatorSpeed, redPredatorMaxTheta);
flock.setHunger(redPredatorHunger);
}
else if (ev.target == detectScrollbar) {
detectDistance = detectScrollbar.getValue();
Bird.DetectionRange = detectDistance;
Flock.DetectionRange = detectDistance;
if (detectDistance < separateDistance) {
separateDistance = detectDistance;
separateScrollbar.setValues(separateDistance, 1, 0, MAXIMUM_DISTANCE);
Bird.SeparationRange = separateDistance;
Flock.SeparationRange = separateDistance;
}
}
else if (ev.target == separateScrollbar) {
separateDistance = separateScrollbar.getValue();
Bird.SeparationRange = separateDistance;
Flock.SeparationRange = separateDistance;
if (detectDistance <separateDistance) {
detectDistance = separateDistance;
detectScrollbar.setValues(detectDistance, 1, 0, MAXIMUM_DISTANCE);
Bird.DetectionRange = detectDistance;
Flock.DetectionRange = detectDistance;
}
}
else if (ev.target == resetButton) {
resetValues();
}
else if (ev.target == showRangesCheckbox) {
Bird.showRanges = showRangesCheckbox.getState();
}
else {
return super.handleEvent(ev); // pass on unprocessed events
}
return true;
}
/**
* This event is fired when a user clicks the applet. If the click is on the
* canvas, then an obstacle is placed on the map.
*
* @param ev The event parameters
* @param x The x coordinate of the mouse click.
* @param y The y coordinate of the mouse click. This is the mouse click
* position on the whole applet, not the canvas.
*/
public boolean mouseDown(Event ev, int x, int y) {
if (ev.modifiers == ev.META_MASK ) {
if ( y > canvas.getLocation().y ) {
flock.addBird(new Food( x, y - canvas.getLocation().y ));
return true;
}
}
else {
if ( y > canvas.getLocation().y ) {
flock.addBird(new Obstacle( x, y - canvas.getLocation().y ));
return true;
}
}
return false;
}
/**
* Adds the slider and other controls to the panel.
*/
public void addControls() {
controls.setLayout( new GridLayout( 6, 4, 5, 5 ));
controls.setBackground( new Color( 224, 224, 224 ));
controlsLabel.setAlignment( Label.CENTER );
greenLabel.setAlignment( Label.CENTER );
blueLabel.setAlignment( Label.CENTER );
redLabel.setAlignment( Label.CENTER );
numberBirdsLabel.setAlignment( Label.RIGHT );
speedLabel.setAlignment( Label.RIGHT );
turnLabel.setAlignment( Label.RIGHT );
redHungerLabel.setAlignment( Label.CENTER );
detectLabel.setAlignment( Label.RIGHT );
separateLabel.setAlignment( Label.RIGHT );
controls.add(controlsLabel);
controls.add(greenLabel);
controls.add(blueLabel);
controls.add(redLabel);
controls.add( numberBirdsLabel);
controls.add(greenNumberBirdsScrollbar);
controls.add(blueNumberBirdsScrollbar);
controls.add(redNumberPredatorsScrollbar);
controls.add(speedLabel);
controls.add(greenSpeedScrollbar);
controls.add(blueSpeedScrollbar);
controls.add(redSpeedScrollbar);
controls.add(turnLabel);
controls.add(greenMaxThetaScrollbar);
controls.add(blueMaxThetaScrollbar);
controls.add(redMaxThetaScrollbar);
controls.add(resetButton);
controls.add(detectLabel);
controls.add(detectScrollbar);
controls.add(redHungerLabel);
controls.add(showRangesCheckbox);
controls.add(separateLabel);
controls.add(separateScrollbar);
controls.add(redHungerScrollbar);
}
/**
* Sets the values of the slider controls on the panel.
*/
public void setControlValues() {
greenNumberBirdsScrollbar.setValues( numberOfGreenBirds, 1, 0, MAXIMUM_BIRDS );
blueNumberBirdsScrollbar.setValues( numberOfBlueBirds, 1, 0, MAXIMUM_BIRDS );
redNumberPredatorsScrollbar.setValues( numberOfRedPredators, 1, 0, MAXIMUM_BIRDS );
greenSpeedScrollbar.setValues( redPredatorSpeed, 1, 0, MAXIMUM_SPEED );
blueSpeedScrollbar.setValues( blueBirdSpeed, 1, 0, MAXIMUM_SPEED );
redSpeedScrollbar.setValues( redPredatorSpeed, 1, 0, MAXIMUM_SPEED );
greenMaxThetaScrollbar.setValues( greenBirdMaxTheta, 1, 0, 180 );
blueMaxThetaScrollbar.setValues( blueBirdMaxTheta, 1, 0, 180 );
redMaxThetaScrollbar.setValues( redPredatorMaxTheta, 1, 0, 180 );
detectScrollbar.setValues( detectDistance, 1, 0, MAXIMUM_DISTANCE );
separateScrollbar.setValues( separateDistance, 1, 0, MAXIMUM_DISTANCE );
redHungerScrollbar.setValues( redPredatorHunger, 1, 1, MAXIMUM_HUNGER );
}
public String getAppletInfo() {
return "Flocking Simulator by Michael LaLena";
}
class SimulatorCanvas extends Canvas {
// Image Object for the canvas
Image canvasImage;
// Graphics Object for the canvas
Graphics canvasGraphics;
// Reference back to the main applet, so we can get to the flock.
Simulator simulator;
/**
* This is the java applet update function.
* It calls paint directly. No need to reset anything first.
*/
public synchronized void update(Graphics g) {
paint(g);
}
/**
* This is the java applet paint function.
* It draws the birds on the map.
*/
public synchronized void paint(Graphics g) {
if (canvas.getWidth() == 0 ) {
return;
}
if (( canvasImage == null ) ||
( canvasImage.getWidth(this) != canvas.getWidth() ) ||
( canvasImage.getHeight(this) != canvas.getHeight() )) {
if ( canvasGraphics != null ) {
canvasGraphics.dispose();
}
canvasImage = createImage(canvas.getWidth(), canvas.getHeight());
canvasGraphics = canvasImage.getGraphics();
}
if ( canvasGraphics != null ) {
canvasGraphics.setColor(Color.white);
canvasGraphics.fillRect(0, 0, canvas.getWidth(), canvas.getHeight());
simulator.flock.draw(canvasGraphics);
canvas.getGraphics().drawImage(canvasImage, 0, 0, this);
}
}
}
} |
