Main Class - Virtual Pet

package com.anim8.engine;


/*
 * public static int windowWidth = 427;
    public static int windowHeight = 640;
        public static String gameName = "Burch-A-Gotchi";
                        gameState.render();


 */
import org.lwjgl.LWJGLException;
import org.lwjgl.Sys;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.DisplayMode;
import org.lwjgl.opengl.GL11;

public class main {

    public enum State {
        OPENING_CREDITS, MAIN_MENU, GAME,
    }
    private static State state = State.GAME;

    public static int windowWidth = 427;
    public static int windowHeight = 640;
    public static String gameName = "Burch-A-Gotchi";


    /** time at last frame */
    long lastFrame;

    /** frames per second */
    int fps;
    /** last fps time */
    long lastFPS;

    public void start() {
        try {
            Display.setDisplayMode(new DisplayMode(windowWidth, windowHeight));
            Display.create();
        } catch (LWJGLException e) {
            e.printStackTrace();
            System.exit(0);
        }

        initGL(); // init OpenGL
        getDelta(); // call once before loop to initialise lastFrame
        lastFPS = getTime(); // call before loop to initialise fps timer

        while (!Display.isCloseRequested()) {

            int delta = getDelta();

            switch(state){
            case OPENING_CREDITS:

                break;
            case MAIN_MENU:
                break;
            case GAME:
                gameState.render();
                break;
        }

            update();

            glFlush();
            Display.update();
            Display.sync(60); // cap fps to 60fps
        }

        Display.destroy();
    }

    private void glFlush() {
        // TODO Auto-generated method stub

    }

    public void update() {

        updateFPS(); // update FPS Counter
    }

    /**
     * Calculate how many milliseconds have passed
     * since last frame.
     *
     * @return milliseconds passed since last frame
     */
    public int getDelta() {
        long time = getTime();
        int delta = (int) (time - lastFrame);
        lastFrame = time;

        return delta;
    }

    /**
     * Get the accurate system time
     *
     * @return The system time in milliseconds
     */
    public long getTime() {
        return (Sys.getTime() * 1000) / Sys.getTimerResolution();
    }

    /**
     * Calculate the FPS and set it in the title bar
     */
    public void updateFPS() {
        if (getTime() - lastFPS > 1000) {
            Display.setTitle(gameName + " | FPS: " + fps);
            fps = 0;
            lastFPS += 1000;
        }
        fps++;
    }

    public void initGL() {
        GL11.glMatrixMode(GL11.GL_PROJECTION);
        GL11.glLoadIdentity();
        GL11.glOrtho(0, windowWidth, windowHeight, 0,  1, -1);
        GL11.glMatrixMode(GL11.GL_MODELVIEW);
        GL11.glEnable(GL11.GL_TEXTURE_2D);
        GL11.glEnable(GL11.GL_BLEND);
        GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
    }


    public static void main(String[] argv) {
        main main = new main();
        main.start();
    }
}