package animationtest;

/*
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 * and open the template in the editor.
 */



//AnimationTest program
import java.awt.*;
import javax.swing.*;
import java.util.*;
import java.awt.image.*;
import java.net.*;

/**
 *
 * @author Ольга
 */
public class AnimationTest extends JFrame implements Runnable{
    static int ScreenWidth = 640;
    static int ScreenHeight = 480;
    Thread gameloop;
    Random rand = new Random();

    //double budder objects
     BufferedImage backbuffer;
     Graphics2D g2d;
    
     //sprite variables
     Image image;
     Point pos = new Point(300,200);

     //animation variables
     int currentFrame = 0;
     //Количество фреймов в анимации
     int totalFrames = 20;
     int animationDirection = 1;
     int frameCount = 0;
     int frameDelay = 10;
     
    public static void main(String[] args) {
        new AnimationTest();
    }
    
    public AnimationTest(){
        super("Animation Test");
        setSize(ScreenWidth,ScreenHeight);
        setVisible(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //create the back buffer for smooth graphics
        backbuffer = new BufferedImage(ScreenWidth, ScreenHeight,
                BufferedImage.TYPE_INT_RGB);
        g2d = backbuffer.createGraphics();

        //load the ball animation strip
        Toolkit tk = Toolkit.getDefaultToolkit();
        image = tk.getImage(getURL("explosion.png"));

        gameloop = new Thread(this);
        gameloop.start();
    }
    private URL getURL(String filename){
        URL url = null;
        try{
            url = this.getClass().getResource(filename);
        }
        catch(Exception e){}
        return url;
    }
    public void run(){
        Thread t = Thread.currentThread();
        while(t == gameloop){
            try{
                Thread.sleep(5);
            }catch(InterruptedException e){
                e.printStackTrace();
            }
            gameUpdate();
        }
    }


    


    public void gameUpdate(){
        //clear the background
        g2d.setColor(Color.BLACK);
        g2d.fill(new Rectangle(0,0,ScreenWidth-1, ScreenHeight-1));
        //draw the current frame of animation 128 заменить на 95
        drawFrame(image, g2d, pos.x, pos.y, 6, currentFrame, 95, 95);

        g2d.setColor(Color.WHITE);
        g2d.drawString("Position: " + pos.x+","+pos.y, 10, 50);
        g2d.drawString("Animation: " + currentFrame, 10, 70);

        //see if it's time to animate
        frameCount++;
        if(frameCount > frameDelay){
            frameCount=0;
            //update the animation frame
            currentFrame+=animationDirection;
            if(currentFrame>totalFrames - 1){
                currentFrame=0;
                //Случайным образом переносит картинку
                
                    //pos.x = rand.nextInt(ScreenWidth-95);
                   // pos.y = rand.nextInt(ScreenHeight-95);
                   
                
            }
            else if(currentFrame < 0){
                currentFrame = totalFrames - 1;
            }
        }
        repaint();


    }
    public void paint(Graphics g){
        //draw the back buffer to the screen
        g.drawImage(backbuffer, 0, 0, this);
    }
    //draw a single frame of animation
    public void drawFrame(Image source, Graphics2D dest,
            int x, int y, int cols, int frame, int width, int height)
    {
        int fx = (frame % cols)*width;
        int fy = (frame / cols)*height;
        dest.drawImage(source, x, y, x+width, y+height,
                fx, fy, fx+width, fy+height, this);
    }

    

}