Ghost.java

import javafx.application.*;
import javafx.scene.* ;
import javafx.scene.shape.* ;
import javafx.scene.layout.* ;
import javafx.scene.paint.* ;
import javafx.geometry.* ;

public class Ghost
{
	private Polygon triangle ;
	private double x1, y1, x2, y2, x3, y3 ;
	private double centerX, centerY ;				// these are the coordinates used to move the triange
	private double width, height ;
	private Color color ;
	private boolean transparent ;

	public Ghost(Pane pane, double x, double y, double width, double height)		// receive the layout, x, y coordinates and the width and height of the equilateral triangle
	{
		// store the coordinates of the triangle's center point, its height and width
		this.centerX = x ;
		this.centerY = y ;
		this.width = width ;
		this.height = height ;

		// set the 3 coordinates of the equilateral triangle
		this.x1 = x - (width/2) ;
		this.y1 = y - (height/2) ;
		this.x2 = x + (width/2) ;
		this.y2 = y - (height/2) ;
		this.x3 = x ;
		this.y3 = y + (height/2) ;
		
		// create the triangle using the 3 coordinates
		triangle = new Polygon() ;
		triangle.getPoints().addAll(new Double[]{
			x1, y1,
			x2, y2,
			x3, y3}) ;

		this.transparent = false ;
		pane.getChildren().add(triangle) ;
	}

	public void setColor(Color c)
	{
		this.color = c ;
		this.triangle.setFill(c) ;
	}


	public Color getColor()
	{
		return this.color ;
	}

	public Double getX()
	{
		return this.centerX ;
	}

	public Double getY()
	{
		return this.centerY ;
	}

	public void setX(double x_coord)
	{
		double moving = x_coord - this.centerX ;		
		
		this.x1 = this.x1 + moving ;
		this.x2 = this.x2 + moving ;
		this.x3 = this.x3 + moving ;
		this.centerX = x_coord ;

		updateCoords() ;
	}

	public void setY(double y_coord)
	{
		double moving = y_coord - this.centerY ;		
		
		this.y1 = this.y1 + moving ;
		this.y2 = this.y2 + moving ;
		this.y3 = this.y3 + moving ;
		this.centerY = y_coord ;

		updateCoords() ;
	}

	private void updateCoords()
	{
		triangle.getPoints().clear() ;				// get rid of all the current coordinates
		triangle.getPoints().addAll(new Double[]{
			this.x1, this.y1,
			this.x2, this.y2,
			this.x3, this.y3}) ;		
	}

	public void setTransparent(boolean b)
	{
		this.transparent = b ;
	}

	public Boolean isTransparent()
	{
		return this.transparent ;
	}

	public Boolean caughtPacman(Circle pacman, int speed)		// will check if the ghost has caught pacman depending on the speed
	{		
		if((this.centerX-speed == pacman.getCenterX() && this.centerY == pacman.getCenterY()) || (this.centerX+speed == pacman.getCenterX() && this.centerY == pacman.getCenterY()))
			return true ;
		if((this.centerX == pacman.getCenterX() && this.centerY-speed == pacman.getCenterY()) || (this.centerX == pacman.getCenterX() && this.centerY+speed == pacman.getCenterY()))
			return true ;
		if(this.centerX == pacman.getCenterX() && this.centerY == pacman.getCenterY())
			return true ;

		return false ;
	}
}