com.dgzt.core.ButtonFootballGame.java Source code

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Here is the source code for com.dgzt.core.ButtonFootballGame.java

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/*
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package com.dgzt.core;

import com.badlogic.gdx.ApplicationListener;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.glutils.ShaderProgram;

/**
 * The game listener.
 * 
 * @author Dgzt
 */
final public class ButtonFootballGame implements ApplicationListener {

    // --------------------------------------------------
    // ~ Private static members
    // --------------------------------------------------

    /** The path of the vertex shader. */
    private static String VERTEX_SHADER = "shader.vsh";

    /** The path of the fragment shader. */
    private static String FRAGMENT_SHADER = "shader.fsh";

    /** The world view for uniform matrix. */
    private static String WORLD_VIEW = "u_worldView";

    // --------------------------------------------------
    // ~ Private members
    // --------------------------------------------------

    /** The shader. */
    private ShaderProgram shader;

    /** The sprite batch for show text. */
    private SpriteBatch spriteBatch;

    /** The camera. */
    private OrthographicCamera camera;

    /** The main window. */
    private MainWindow mainWindow;

    // --------------------------------------------------
    // ~ Override methods
    // --------------------------------------------------

    /**
     * Create the objects.
     */
    @Override
    public void create() {
        camera = new OrthographicCamera();

        shader = new ShaderProgram(Gdx.files.internal(VERTEX_SHADER).readString(),
                Gdx.files.internal(FRAGMENT_SHADER).readString());
        spriteBatch = new SpriteBatch();

        if (!shader.isCompiled()) {
            Gdx.app.log(ButtonFootballGame.class.getName() + ".create",
                    "Problem loading shader: " + shader.getLog());
        } else if (!shader.getLog().isEmpty()) {
            Gdx.app.log(ButtonFootballGame.class.getName() + ".create", "Shader log: " + shader.getLog());
        }

        mainWindow = new MainWindow(shader, spriteBatch);
    }

    /**
     * Resize the objects.
     */
    @Override
    public void resize(int width, int height) {
        Gdx.app.log(ButtonFootballGame.class.getName() + ".resize",
                String.valueOf(width) + " x " + String.valueOf(height));

        camera.setToOrtho(false, width, height);
        spriteBatch.setProjectionMatrix(camera.combined);

        shader.begin();
        shader.setUniformMatrix(WORLD_VIEW, camera.combined);
        shader.end();

        float mainWindowWidth;
        float mainWindowHeight;

        final double rate = (double) width / height;

        if (MainWindow.WIDTH / MainWindow.HEIGHT > rate) {
            mainWindowWidth = width;
            mainWindowHeight = MainWindow.HEIGHT * (width / MainWindow.WIDTH);
        } else {
            mainWindowWidth = MainWindow.WIDTH * (height / MainWindow.HEIGHT);
            mainWindowHeight = height;
        }

        final float mainWindowX = (width - mainWindowWidth) / 2;
        final float mainWindowY = (height - mainWindowHeight) / 2;
        final double scale = (double) mainWindowWidth / MainWindow.WIDTH;

        mainWindow.resize(mainWindowX, mainWindowY, mainWindowWidth, scale);
    }

    /**
     * Render the objects.
     */
    @Override
    public void render() {
        camera.update();
        Gdx.gl.glClearColor(0, 0, 0, 0);
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
        ;

        shader.begin();
        mainWindow.draw();
        shader.end();
    }

    /**
     * Pause the game.
     */
    @Override
    public void pause() {
    }

    /**
     * Resume the game.
     */
    @Override
    public void resume() {
    }

    /**
     * Dispose the game.
     */
    @Override
    public void dispose() {
    }

}