fr.theshark34.sharkengine.Game.java Source code

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Here is the source code for fr.theshark34.sharkengine.Game.java

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/*
 * Copyright 2015 TheShark34
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License. You may obtain a
 * copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package fr.theshark34.sharkengine;

import java.awt.image.BufferedImage;

import org.lwjgl.LWJGLException;
import org.lwjgl.input.Keyboard;
import org.lwjgl.input.Mouse;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.GL11;
import org.lwjgl.util.Color;

import fr.theshark34.sharkengine.ui.GUI;
import fr.theshark34.sharkengine.util.DisplayUtil;
import fr.theshark34.sharkengine.util.ErrorUtil;

/**
 * The main Game class
 * 
 * @author TheShark34
 * @version ALPHA 0.0.1
 */
public class Game {

    /**
     * If the Game is running
     */
    private static boolean running;

    /**
     * The Game name
     */
    private static String name;

    /**
     * The title of the Game window
     */
    private static String title;

    /**
     * The icon of the Game window
     */
    private static BufferedImage icon;

    /**
     * The current displayed {@link GUI}
     */
    private static GUI currentGUI;

    /**
     * The clear color (= background color)
     */
    private static Color clearColor;

    /**
     * Create the Game
     * 
     * @param name
     *            The name of the Game
     * @param title
     *            The title of the Game window
     * @param icon
     *            The icon of the Game window
     * @param firstGUI
     *            The first displayed GUI
     * @param clearColor
     *            The clear color (= background color)
     */
    public static void create(final String name, final String title, final BufferedImage icon, GUI firstGUI,
            Color clearColor) {
        try {
            // Setting up things
            Game.name = name;
            Game.title = title;
            Game.icon = icon;
            Game.clearColor = clearColor;
            running = true;

            // Creating the Display, the Mouse and the Keyboard
            DisplayUtil.setDisplayModeAndFullscreen();
            Display.setTitle(title);
            Display.create();
            Mouse.create();
            Keyboard.create();

            // Initializing OpenGL
            GL11.glMatrixMode(GL11.GL_PROJECTION);
            GL11.glLoadIdentity();
            GL11.glOrtho(0, Display.getWidth(), Display.getHeight(), 0, -1, 1);
            GL11.glMatrixMode(GL11.GL_MODELVIEW);

            // Displaying the first GUI
            setCurrentGUI(firstGUI);

            // Start the main loop
            while (running)
                update();

            // Destroy all
            Display.destroy();
            Mouse.destroy();
            Keyboard.destroy();
        } catch (LWJGLException e) {
            ErrorUtil.catchError(e);
        }
    }

    /**
     * The current clear color (= background color)
     * 
     * @return The current clear color
     */
    public static Color getClearColor() {
        return clearColor;
    }

    /**
     * Set a new clear color (= background color)
     * 
     * @param clearColor
     *            The new clear color
     */
    public static void setClearColor(Color clearColor) {
        Game.clearColor = clearColor;
    }

    /**
     * Update the window, called by the main loop of the create() method
     */
    private static void update() {
        // Clear all
        GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
        GL11.glClearColor((float) clearColor.getRed() / 255, (float) clearColor.getGreen() / 255,
                (float) clearColor.getBlue() / 255, (float) clearColor.getAlpha() / 255);

        // Draw the current GUI
        if (currentGUI != null)
            currentGUI.draw();

        // Check if user requested close
        if (Display.isCloseRequested())
            stop();

        // Update the Display
        Display.update();
    }

    /**
     * Stop the Game by setting running to false
     */
    public static void stop() {
        running = false;
    }

    /**
     * The Game name set in the create() method
     * 
     * @return The Game name
     */
    public static String getName() {
        return name;
    }

    /**
     * The title of the Game window set in the create() method
     * 
     * @return The title of the Game window
     */
    public static String getTitle() {
        return title;
    }

    /**
     * Set a new title for the Game window
     * 
     * @param title
     *            The new title
     */
    public static void setTitle(String title) {
        Game.title = title;
        Display.setTitle(title);
    }

    /**
     * The icon of the Game window set in the create() method
     * 
     * @return The icon of the Game window
     */
    public static BufferedImage getIcon() {
        return icon;
    }

    /**
     * If the game is running
     * 
     * @return If the game is running
     */
    public static boolean isRunning() {
        return running;
    }

    /**
     * Display a new GUI
     * 
     * @param g
     *            The new GUI to display
     */
    public static void setCurrentGUI(GUI g) {
        if (g == null)
            throw new IllegalArgumentException("g == null !");
        g.init();
        currentGUI = g;
    }

}