Main Class LWJGL Project

package se.wouix.voxel;

import org.lwjgl.*;
import org.lwjgl.opengl.*;
import org.lwjgl.util.glu.GLU;

import se.wouix.voxel.gamestatemanager.GameStateManager;

public class VoxelEngine implements Runnable {

    public static int HEIGHT = 800;
    public static int WIDTH = 900;

    public static double UPS = 60.0;

    public static final DisplayMode DISPLAY_MODE = new DisplayMode(WIDTH, HEIGHT);
    public static final String TITLE = "Voxel Tech Test";

    public void init() throws LWJGLException {
        Display.setDisplayMode(DISPLAY_MODE);
        Display.setTitle(TITLE);
        Display.setResizable(true);
        Display.create();


        GL11.glClearColor(0.1f, 0.4f, 0.9f, 1.0f);

        GL11.glEnable(GL11.GL_DEPTH_TEST);
        GL11.glEnable(GL11.GL_COLOR_MATERIAL);

        GL11.glMatrixMode(GL11.GL_PROJECTION);
        GLU.gluPerspective(45f, DISPLAY_MODE.getWidth()/DISPLAY_MODE.getHeight(), 0.1f, 1000f);

        GL11.glMatrixMode(GL11.GL_MODELVIEW);
    }

    public void run() {
        try {
            init();
        } catch (LWJGLException e) {
            System.err.println("LWJGL Failed to load");
        }

        GameStateManager gsm = new GameStateManager();
        Timer timer = new Timer(UPS);

        while (!Display.isCloseRequested()) {
            timer.updateTimer();

            while (timer.rightTime()) {
                gsm.update();
            }
            Display.update();

            {
                GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
                GL11.glLoadIdentity();

                GL11.glPushMatrix();
                {
                    gsm.render();
                }
                GL11.glPopMatrix();
            }

            timer.afterSecond();
        }
    }

    public static void main(String[] args) {
        new Thread(new VoxelEngine()).start();
    }

}