Now I get the following message in JCreator:
java.lang.NoClassDefFoundError
at Game.cleanup(Game.java:105)
at Game.main(Game.java:40)
Exception in thread "main"
Process completed.
here’s the code:
import org.lwjgl.Sys;
import org.lwjgl.input.Keyboard;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.GL11;
/**
* Basic game
*
* @author Name <email>
* @version 1.0
*/
public class Game {
/** Game title */
public static final String GAME_TITLE = "My Game";
/** Desired frame time */
private static final int FRAMERATE = 60;
/** Exit the game */
private static boolean finished;
/** Angle of rotating square */
private static float angle;
/**
* Application init
* @param args Commandline args
*/
public static void main(String[] args) {
boolean fullscreen = (args.length == 1 && args[0].equals("-fullscreen"));
try {
init(fullscreen);
run();
} catch (Exception e) {
e.printStackTrace(System.err);
Sys.alert(GAME_TITLE, "An error occured and the game will exit.");
} finally {
cleanup();
}
System.exit(0);
}
/**
* Initialise the game
* @throws Exception if init fails
*/
private static void init(boolean fullscreen) throws Exception {
// Create a fullscreen window with 1:1 orthographic 2D projection (default)
Display.setTitle(GAME_TITLE);
Display.setFullscreen(fullscreen);
// Enable vsync if we can (due to how OpenGL works, it cannot be guarenteed to always work)
Display.setVSyncEnabled(true);
// Create default display of 640x480
Display.create();
}
/**
* Runs the game (the "main loop")
*/
private static void run() {
while (!finished) {
// Always call Window.update(), all the time - it does some behind the
// scenes work, and also displays the rendered output
Display.update();
// Check for close requests
if (Display.isCloseRequested()) {
finished = true;
}
// The window is in the foreground, so we should play the game
else if (Display.isActive()) {
logic();
render();
Display.sync(FRAMERATE);
}
// The window is not in the foreground, so we can allow other stuff to run and
// infrequently update
else {
try {
Thread.sleep(100);
} catch (InterruptedException e) {
}
logic();
// Only bother rendering if the window is visible or dirty
if (Display.isVisible() || Display.isDirty()) {
render();
}
}
}
}
/**
* Do any game-specific cleanup
*/
private static void cleanup() {
// Close the window
Display.destroy();
}
/**
* Do all calculations, handle input, etc.
*/
private static void logic() {
// Example input handler: we'll check for the ESC key and finish the game instantly when it's pressed
if (Keyboard.isKeyDown(Keyboard.KEY_ESCAPE)) {
finished = true;
}
// Rotate the square
angle += 2.0f % 360;
}
/**
* Render the current frame
*/
private static void render() {
// clear the screen
GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_STENCIL_BUFFER_BIT);
// center square according to screen size
GL11.glPushMatrix();
GL11.glTranslatef(Display.getDisplayMode().getWidth() / 2, Display.getDisplayMode().getHeight() / 2, 0.0f);
// rotate square according to angle
GL11.glRotatef(angle, 0, 0, 1.0f);
// render the square
GL11.glBegin(GL11.GL_QUADS);
GL11.glVertex2i(-50, -50);
GL11.glVertex2i(50, -50);
GL11.glVertex2i(50, 50);
GL11.glVertex2i(-50, 50);
GL11.glEnd();
GL11.glPopMatrix();
}
}
Maybe i should just try to re-install everything and clean up the mess it has turned into and then give it another try :-\
JOGL is some more official, since sun is involved in the development and LWJGL is more community driven. JOGL is “only” an OpenGL binding, while LWJGL also adds sound and input processing not available in standard JRE, like Joystick support and a more direct input response.