Pong/GamePanel.java at main · dperry17/Pong · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;

public class GamePanel extends JPanel implements Runnable{

    static final int GAME_WIDTH = 1000;
    static final int GAME_HEIGHT = (int)(GAME_WIDTH * (5.0/9.0));
    static final Dimension SCREEN_SIZE = new Dimension(GAME_WIDTH, GAME_HEIGHT);
    static final int BALL_DIAMETER = 20;
    static final int PADDLE_WIDTH = 25;
    static final int PADDLE_HEIGHT = 100;
    Thread gameThread;
    Image image;
    Graphics graphics;
    Random rand;
    paddle paddle1;
    paddle paddle2;
    ball ball;
    score score;


    GamePanel(){
        newPaddles();
        newBall();
        score = new score(GAME_WIDTH, GAME_HEIGHT);
        this.setFocusable(true);
        this.addKeyListener(new AL());
        this.setPreferredSize(SCREEN_SIZE);

        gameThread = new Thread(this);
        gameThread.start();
    }

    public void newBall(){
        rand = new Random();

        ball = new ball((GAME_WIDTH/2)-(BALL_DIAMETER/2), (GAME_HEIGHT/2)-(BALL_DIAMETER/2), BALL_DIAMETER, BALL_DIAMETER);

    }

    public void newPaddles(){
        paddle1 = new paddle(0, (GAME_HEIGHT/2) - (PADDLE_HEIGHT/2), PADDLE_WIDTH, PADDLE_HEIGHT, 1);
        paddle2 = new paddle(GAME_WIDTH-PADDLE_WIDTH, (GAME_HEIGHT/2) - (PADDLE_HEIGHT/2), PADDLE_WIDTH, PADDLE_HEIGHT, 2);
    }

    public void paint(Graphics g){
        image = createImage(getWidth(), getHeight());
        graphics = image.getGraphics();
        draw(graphics);
        g.drawImage(image, 0, 0, this);
    }

    public void draw(Graphics g){
        ball.draw(g);
        paddle1.Draw(g);
        paddle2.Draw(g);
        score.draw(g);
        Toolkit.getDefaultToolkit().sync();
    }

    public void move(){

        paddle1.move();
        paddle2.move();
        ball.move();

    }

    public void checkCollision(){


        //bounces ball off of paddles
        if(ball.intersects(paddle1)){
            ball.xVelocity = Math.abs(ball.xVelocity);
            ball.xVelocity++;

            if(ball.yVelocity > 0){
                ball.yVelocity++;
            }
            else{
                ball.yVelocity--;
            }
            ball.setXDirection(ball.xVelocity);
            ball.setYDirection(ball.yVelocity);
        }

        if(ball.intersects(paddle2)){
            ball.xVelocity = Math.abs(ball.xVelocity);
            ball.xVelocity++;

            if(ball.yVelocity > 0){
                ball.yVelocity++;
            }
            else{
                ball.yVelocity--;
            }
            ball.setXDirection(-ball.xVelocity);
            ball.setYDirection(ball.yVelocity);
        }


        //bounce the ball off of the top
        if(ball.y <= 0){
            ball.setYDirection(-ball.yVelocity);
        }
        if(ball.y >= GAME_HEIGHT-BALL_DIAMETER){
            ball.setYDirection(-ball.yVelocity);
        }

        //bounds for paddles
        if(paddle1.y<=0){
            paddle1.y = 0;
        }
        if(paddle1.y >= (GAME_HEIGHT-PADDLE_HEIGHT)){
            paddle1.y = GAME_HEIGHT-PADDLE_HEIGHT;
        }
        if(paddle2.y<=0){
            paddle2.y = 0;
        }
        if(paddle2.y >= (GAME_HEIGHT-PADDLE_HEIGHT)){
            paddle2.y = GAME_HEIGHT-PADDLE_HEIGHT;
        }

        //gives player one point, creates new paddles and ball
        if(ball.x <= 0){
            score.player2++;
            newPaddles();
            newBall();
        }

        if(ball.x >= GAME_WIDTH-BALL_DIAMETER){
            score.player1++;
            newPaddles();
            newBall();
        }
    }

    public void run(){
        //game loop
        long lastTime = System.nanoTime();
        double amountOfTicks = 60.0;
        double ns = 1000000000 / amountOfTicks;
        double delta = 0;

        while(true){
            long now = System.nanoTime();
            delta += (now - lastTime) / ns;
            lastTime = now;
            if(delta >= 1){
                move();
                checkCollision();
                delta--;
                repaint();
            }
            if(score.player1 == 5 || score.player2 == 5)
                break;
        }
        System.exit(1);

    }

    public class AL extends KeyAdapter{
        public void keyPressed(KeyEvent e){
            paddle1.keyPressed(e);
            paddle2.keyPressed(e);
        }

        public void keyReleased(KeyEvent e){
            paddle1.keyReleased(e);
            paddle2.keyReleased(e);
        }
    }
}