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Thread: How to find Object in coordinate system

  1. #1
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    Default How to find Object in coordinate system

    Hi2all !!
    Well first for all im new to java and ive trying to get a job in a game-dev company;
    As a test ive got a task to create a puyopuyo game.
    All is goin pretty well with the development, but got some stucks.

    Ok now the question:

    Ive a scene 10px*10px (Example)
    Ive an object with x,y coordinates
    Its located at x=5 , y=5 ;
    Now ive an other object (№2) x=4 , y=5;

    The question is : How to find this object(number 2) ;
    I mean i need a method that will check is there an object in a radius of 1px away from the Object in center;
    Of course assuming that both objects are in one clollection;


  2. #2
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    Default Re: How to find Object in coordinate system

    Ok a little bit more explanation;
    The objects have one parameter with some vlaues;
    I need to find objects having same values of a variable and 1px away from each other for example x or y;

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    Default Re: How to find Object in coordinate system

    If I understand correctly, there are perhaps dozens of ways to do what you want. You can brute for it - loop through all the objects and find ones with the appropriate values, you could create a Map keyed with a custom object containing those values, you could create an adjacency matrix, you could maintain references to adjacent objects...

  4. #4
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    Default Re: How to find Object in coordinate system

    Quote Originally Posted by copeg View Post
    If I understand correctly, there are perhaps dozens of ways to do what you want. You can brute for it - loop through all the objects and find ones with the appropriate values, you could create a Map keyed with a custom object containing those values, you could create an adjacency matrix, you could maintain references to adjacent objects...
    Okay... Here is the code
    Simple PuyoPuyo GAme

    Panel.class
    import java.awt.Color;
    import java.awt.Graphics;
    import java.awt.Graphics2D;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.awt.event.KeyAdapter;
    import java.awt.event.KeyEvent;
    import java.awt.event.KeyListener;
    import java.util.ArrayList;
    import java.util.Iterator;
    import java.util.List;
     
    import javax.swing.JPanel;
    import javax.swing.Timer;
     
     
    public class Panel extends JPanel{
    	Timer timer1,timer2;
     
    	Timer inputTimer;
     
    	int [][] grid =	new int [12][7];
     
    	int vSpeed=200;
     
    	int dy=0;
     
    	List<Shape> spheres = new ArrayList<Shape>();	
     
    	ArrayList toDelete = new ArrayList<Integer>();
     
    	private boolean spawn = false;
     
    	private boolean removeVertical;
     
    	private boolean removeHorizontal;
     
    	private boolean left;
     
    	private boolean right;	
     
    	int objIndex;
     
    	int SpheresAmount;
     
     
    //----------------------- The panel constructor
    	public Panel ()  
    	{
    		//Init JPANEL 
    		setFocusable(true);
    		setBackground(Color.BLACK);
    		setDoubleBuffered(true);
    		addKeyListener(new MyKeyAdapter());
    		timer1 = new Timer(vSpeed,new ListenerTimer1());
    		timer2 = new Timer (100,new ListenerTimer2());
    		timer1.start();
    		timer2.start();
    		spheres.add(new Shape());
    	}
     
    /* ------------------  Main Method------------------*/
     
    	public void paint (Graphics g)
    	{
    		super.paint(g);
    		Graphics2D g2d= (Graphics2D) g;
    		Iterator<Shape> j = spheres.iterator();
     
    		while (j.hasNext())
    		{
    			Shape s = j.next();	
    			g.drawImage(s.getImage(),s.getY(),s.getX(),null	);
     
    		//-------Border Collision check-------//
    			if (grid[s.getGx()+1][s.getGy()]!=0||s.getGx()==10)
    			{	
    				if (!j.hasNext())
    				{
    					s.setDx(0);
    					grid[s.getGx()][s.getGy()]=s.getColor();
    					spawn=true;
     
    				}			
    			}
    		//-------3 vertical check-------//
    			if (grid[s.getGx()+1][s.getGy()]==s.getColor()&&grid[s.getGx()-1][s.getGy()]==s.getColor())
    			{
    				SpheresAmount=spheres.size();
    					removeVertical=true;
    			}
    		//-------3 horizontal check---
    			if (grid[s.getGx()][s.getGy()+1]==s.getColor()&&grid[s.getGx()][s.getGy()+2]==s.getColor())
    				removeHorizontal=true;
     
     
     
    		//--------END LOOP-------//
    		}
    			if (removeVertical)
    			{
    				deleteVertical();				
    				removeVertical=false;
    			}
     
    			if (removeHorizontal)
    			{
    				deleteHorizontal();
    				removeHorizontal=false;
    			}
     
    			if(spawn)
    			{
    				spheres.add(new Shape());
    				spawn = false;
    			}
    	}
     
     
     
    	private void deleteHorizontal()
    	{
    		Iterator<Shape> j = spheres.iterator();
    		while (j.hasNext()){
    			Shape d = j.next();
     
     
    			if (spheres.size()+2<SpheresAmount){
    				grid[d.getGx()][d.getGy()]=0;
    				grid[d.getGx()][d.getGy()+1]=0;
    				grid[d.getGx()][d.getGy()+2]=0;
    				SpheresAmount=spheres.size();
    			}
    		}
     
    	}
     
     
    	private void deleteVertical() {
    		Iterator<Shape> j = spheres.iterator();
    		while (j.hasNext()){
    			Shape d = j.next();
    			if (grid[d.getGx()+1][d.getGy()]==d.getColor()&&grid[d.getGx()+2][d.getGy()]==d.getColor()){j.remove();}
    			if (grid[d.getGx()-1][d.getGy()]==d.getColor()&&grid[d.getGx()+1][d.getGy()]==d.getColor()){j.remove();}
    			if (grid[d.getGx()-1][d.getGy()]==d.getColor()&&grid[d.getGx()-2][d.getGy()]==d.getColor()){j.remove();}
    			if (spheres.size()+2<SpheresAmount){
     
    				grid[d.getGx()][d.getGy()]=0;
    				grid[d.getGx()+1][d.getGy()]=0;
    				grid[d.getGx()+2][d.getGy()]=0;
    				SpheresAmount=spheres.size();
    			}
     
    		}
     
    	}
     
    	// ---------------- INPUT -------------------//
    	private class MyKeyAdapter extends KeyAdapter
    	{
     
    		public void keyReleased (KeyEvent e){
    			int	key = e.getKeyCode();
    			if(key==KeyEvent.VK_LEFT)left=false;
    			if(key==KeyEvent.VK_RIGHT)right=false;
     
    		}
    		public void keyPressed (KeyEvent e){
     
    			int	key = e.getKeyCode();
    			if(key==KeyEvent.VK_LEFT)left=true;
    			if(key==KeyEvent.VK_RIGHT)right=true;
     
    		}
    	}
     
    	// ------------Action Listener---------------//
    	private class ListenerTimer1 implements ActionListener
    	{
     
    		public void actionPerformed(ActionEvent arg0) 
    		{
    			Iterator <Shape> j  = spheres.iterator();
    			while (j.hasNext())
    			{
    				Shape s = j.next();
    				s.move();
    			}
     
    			repaint();
    			}
     
    	}
    	// ------------Input movement updater-----------//
    	private class ListenerTimer2 implements ActionListener
    	{
    		public void actionPerformed(ActionEvent arg0) 
    		{
     
    			Iterator <Shape> j  = spheres.iterator();
    			while (j.hasNext())
    			{
    				Shape s = j.next();	
    				if (s.dx!=0&&right==true){
    					s.moveRight();repaint();
    				}
    				if (s.dx!=0&&left==true){
    					s.moveLeft();repaint();
    				}
    			}
    		}
     
    	}
    	//-----------------------------------------------//
    }
    Shape.class
    import java.awt.Image;
    import java.awt.Rectangle;
    import java.awt.event.KeyEvent;
    import java.util.ArrayList;
    import java.util.Random;
     
    import javax.swing.ImageIcon;
     
     
    public class Shape {
     
    int x,y,gx,gy;
    int dx = 32;
    int dy;
    int i;
    int colorCode=1;
     
    Random random = new Random();
    String texture="red.png";
    Image image;
    ImageIcon ii;
     
    boolean  delete ;
     
    /* --------------- Constructor -------------------*/
    	public Shape ()
    	{
    		//colorGen ();
    		ii = new ImageIcon(getClass().getResource(texture));
    		image = ii.getImage();
    	}
     
    	//------The random color generator----
    	public void colorGen ()
    	{
    	int ran = random.nextInt(4);
    		switch (ran){
    		case 0: texture = "red.png";colorCode=1;break;
    		case 1 :texture = "green.png";colorCode=2;break;
    		case 2 : texture = "blue.png";colorCode=3;break;
    		case 3 : texture = "yellow.png";colorCode=4;break;
    		}
    	}
     
    	//-------------Movement-------------
    	public void keyPressed (KeyEvent e){
    	int	key = e.getKeyCode();
    		if(dx!=0&&key==KeyEvent.VK_LEFT)dy=-32;
    		if(dx!=0&&key==KeyEvent.VK_RIGHT)dy=32;
    		System.out.println(dy);
    	}
    	public void keyReleased (KeyEvent e){
    		int	key = e.getKeyCode();
    		if(key==KeyEvent.VK_LEFT)dy=0;
    		if(key==KeyEvent.VK_RIGHT)dy=0;
    	}
    	//-----------------------------------
     
    	public Image getImage ()
    	{
    		return image;
    	}
     
    	public void move () 
    	{ 
    		x+=dx;
    	}
    	public void moveLeft(){
    		y-=32;
    		if (y<=0)y=0;
    	}
    	public void moveRight(){
    		y+=32;
    		if (y>=160)y=160;
    	}
     
    	public void setDx (int dx)
    	{
    		this.dx = dx;
    	}
    	public void setDy (int dy)
    	{
    		this.dy = dy;
    	}
     
    	public void setX(int x)
    	{
    		this.x=x;
    	}
    	public void setY(int y)
    	{
    		this.y=y;
    	}
    	public void setDelete(boolean delete){
    		this.delete=delete;
    	}
    	public boolean getDelete(){
    		return delete;
    	}
    	public int getX(){
    		return x;
    	}
    	public int getY(){
    		return y;
    	}
    	public int getGx(){
    		return gx=x/32;
    	}
    	public int getGy (){
    		return gy=y/32;
    	}
    	public int getColor () {
    		return colorCode;
    	}
     
    }

    Well i know that im doing something terrible wrong but i just cant see it maybe some one can give a fresh look at this situtation or maybe what would be the best aproach in this case to find this spheres.

  5. #5
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    Default Re: How to find Object in coordinate system

    Quote Originally Posted by Eldarmk2 View Post
    Hi2all !!
    Well first for all im new to java and ive trying to get a job in a game-dev company;
    As a test ive got a task to create a puyopuyo game.
    All is goin pretty well with the development, but got some stucks.

    Ok now the question:

    Ive a scene 10px*10px (Example)
    Ive an object with x,y coordinates
    Its located at x=5 , y=5 ;
    Now ive an other object (№2) x=4 , y=5;

    The question is : ...
    This presents a moral dilemma for us. If this is a test, should you be soliciting help here online? Should we be helping you?

  6. The Following User Says Thank You to Fubarable For This Useful Post:

    copeg (July 9th, 2012)

  7. #6
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    Default Re: How to find Object in coordinate system

    Well im allowed to use any source of information to get the test done.
    Im not allowed to copy existing code.

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