/*
* Copyright (c) 2013, Oskar Veerhoek
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those
* of the authors and should not be interpreted as representing official policies,
* either expressed or implied, of the FreeBSD Project.
*/
package episode_9;
import org.lwjgl.LWJGLException;
import org.lwjgl.Sys;
import org.lwjgl.input.Keyboard;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.DisplayMode;
import static org.lwjgl.opengl.GL11.*;
/**
* Creates the simplistic game Pong. Discontinued to to lack of popularity.
*
* @author Oskar
*/
public class PongGame {
private static final int WIDTH = 640;
private static final int HEIGHT = 480;
private static boolean isRunning = true;
private static Ball ball;
private static Bat bat;
public static void main(String[] args) {
setUpDisplay();
setUpOpenGL();
setUpEntities();
setUpTimer();
while (isRunning) {
render();
logic(getDelta());
input();
Display.update();
Display.sync(60);
if (Display.isCloseRequested()) {
isRunning = false;
}
}
Display.destroy();
System.exit(0);
}
private static void input() {
if (Keyboard.isKeyDown(Keyboard.KEY_UP)) {
bat.setDY(-.2);
} else if (Keyboard.isKeyDown(Keyboard.KEY_DOWN)) {
bat.setDY(.2);
} else {
bat.setDY(0);
}
}
private static long lastFrame;
private static long getTime() {
return (Sys.getTime() * 1000) / Sys.getTimerResolution();
}
private static int getDelta() {
long currentTime = getTime();
int delta = (int) (currentTime - lastFrame);
lastFrame = getTime();
return delta;
}
private static void setUpDisplay() {
try {
Display.setDisplayMode(new DisplayMode(WIDTH, HEIGHT));
Display.setTitle("Pong");
Display.create();
} catch (LWJGLException e) {
e.printStackTrace();
Display.destroy();
System.exit(1);
}
}
private static void setUpOpenGL() {
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, 640, 480, 0, 1, -1);
glMatrixMode(GL_MODELVIEW);
}
private static void setUpEntities() {
bat = new Bat(10, HEIGHT / 2 - 80 / 2, 10, 80);
ball = new Ball(WIDTH / 2 - 10 / 2, HEIGHT / 2 - 10 / 2, 10, 10);
ball.setDX(-.1);
}
private static void setUpTimer() {
lastFrame = getTime();
}
private static void render() {
glClear(GL_COLOR_BUFFER_BIT);
ball.draw();
bat.draw();
}
private static void logic(int delta) {
ball.update(delta);
bat.update(delta);
if (ball.getX() <= bat.getX() + bat.getWidth() && ball.getX() >= bat.getX() && ball.getY() >= bat.getY() &&
ball.getY() <= bat.getY() + bat.getHeight()) {
ball.setDX(0.3);
}
}
private static class Bat extends AbstractMovableEntity {
public Bat(double x, double y, double width, double height) {
super(x, y, width, height);
}
@Override
public void draw() {
glRectd(x, y, x + width, y + height);
}
}
private static class Ball extends AbstractMovableEntity {
public Ball(double x, double y, double width, double height) {
super(x, y, width, height);
}
@Override
public void draw() {
glRectd(x, y, x + width, y + height);
}
}
}