/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package game;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.util.TimerTask;
import java.util.Timer;
import javax.swing.JPanel;

/**
 *
 * @author chief
 */
public class Game extends javax.swing.JFrame
{ boolean b, c;
  int d0=8, d1=8, w, h;
  double a, v0, v0x, v0y, t, x=-d0, y=-d0, x_0, y_0,
    x_1=720-d1/2, y_1=383-d1/2,  dt=0.05,  g=9.8;
  Timer timer;
    /**
     * Creates new form Game
     */
    public Game() {initComponents();}

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        jPanel1 = new Panel();
        jLabel1 = new javax.swing.JLabel();
        jTextField1 = new javax.swing.JTextField();
        jTextField2 = new javax.swing.JTextField();
        jLabel2 = new javax.swing.JLabel();
        jTextField3 = new javax.swing.JTextField();
        jLabel3 = new javax.swing.JLabel();
        jTextField4 = new javax.swing.JTextField();
        jButton1 = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("Гра «Постріл гармати»");
        setAutoRequestFocus(false);

        jPanel1.setBackground(new java.awt.Color(150, 200, 255));
        jPanel1.setForeground(new java.awt.Color(150, 200, 255));

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 0, Short.MAX_VALUE)
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 423, Short.MAX_VALUE)
        );

        jLabel1.setText("Координати цілі");

        jTextField1.setText("720");

        jTextField2.setText("383");

        jLabel2.setText("Кут");

        jTextField3.setText("53");

        jLabel3.setText("Швидкість");

        jTextField4.setText("88");

        jButton1.setText("Вогонь!");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jLabel1)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(54, 54, 54)
                .addComponent(jLabel2)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(48, 48, 48)
                .addComponent(jLabel3)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(jTextField4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 148, Short.MAX_VALUE)
                .addComponent(jButton1)
                .addGap(84, 84, 84))
            .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jLabel2)
                    .addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jLabel3)
                    .addComponent(jTextField4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jButton1))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
      b = true;
      c = false;
      t = 0;
      x_1 = Float.parseFloat(jTextField1.getText())-d1/2;
      y_1 = Float.parseFloat(jTextField2.getText())-d1/2;
      a   = Float.parseFloat(jTextField3.getText());
      v0  = Float.parseFloat(jTextField4.getText());
      v0x =  v0*Math.cos(a*Math.PI/180);
      v0y = -v0*Math.sin(a*Math.PI/180);
      timer = new Timer();
      timer.schedule(new Step(), 0,50);  
    }//GEN-LAST:event_jButton1ActionPerformed
    class Step extends TimerTask
    { @Override
      public void run()
      { if (b)
        { x = x_0 + v0x*t;
          y = y_0 + v0y*t + g*t*t/2;
          c=(4*((x-x_1)*(x-x_1)+(y-y_1)*(y-y_1))<(d0+d1)*(d0+d1));
          jPanel1.repaint();
          t+=dt;
          b = (x<w) && (y<h) && (!c);
          if (c) { timer.cancel();} 
        }
        else   { timer.cancel();} 
      }
    }
public class Panel extends JPanel
{ Image boom;
  @Override
  public void paint (Graphics g)
  { Graphics2D g2 = (Graphics2D) g;
    w = getSize().width;                                 // ширина панелі
    h = getSize().height;                                // висота панелі
    if (t==0) {x_0=-d0/2; y_0=h-d0/2;}                   // початкові координати ядра 
    BufferedImage bi = (BufferedImage) createImage(w, h);// буфер зображення
    Graphics2D big = bi.createGraphics();                // і його графічний контекст
    big.setColor(new Color(150,200,255));                // колір тла
    big.fillRect(0, 0, w, h);                            // зображення тла
    if (c) { boom = getToolkit().getImage("boom.png");   // завантаження файлу зображення вибуху
             x = (x+x_1-(d0+d1)/2)/2 - 76/2;
             y = (y+y_1-(d0+d1)/2)/2 - 70/2;
             big.drawImage(boom, (int) (x+x_1-(d0+d1)/2)/2 - 38,
                                 (int) (y+y_1-(d0+d1)/2)/2 - 35, this);
             // зображення вибуху у буфері
           }
    else   { big.setColor(Color.red);                    // колір цілі
             big.fillOval( (int) x_1, (int) y_1, d1, d1);// зображення цілі
             big.setColor(Color.black);                  // колір ядра
             big.fillOval( (int) x,   (int) y,   d0, d0);// зображення ядра
           }
    g2.drawImage(bi, 0, 0, this); // вивести зображення-буфер на экран
  }
}

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(Game.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(Game.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(Game.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(Game.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Game().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton jButton1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JTextField jTextField1;
    private javax.swing.JTextField jTextField2;
    private javax.swing.JTextField jTextField3;
    private javax.swing.JTextField jTextField4;
    // End of variables declaration//GEN-END:variables
}