apps101.libgdx_demo.Game.java Source code

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Here is the source code for apps101.libgdx_demo.Game.java

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/* This file is provided under the Apache 2.0 License. Please see the LICENSE file for more details */
/**
 *  Creative Commons License Attribution for the image:
 * 
 *  File:   "Yellow Happy.jpg"
 *  Author:   Jgsho (Own work)
 *  Source:   http://commons.wikimedia.org/wiki/File%3AYellow_Happy.jpg
 *  License: [CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
 */

package apps101.libgdx_demo;

import com.badlogic.gdx.ApplicationListener;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.GL10;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.math.Rectangle;
import com.badlogic.gdx.math.Vector3;

public class Game implements ApplicationListener {

    private static final int CAMERA_WIDTH = 480;
    private static final int CAMERA_HEIGHT = 800;

    Texture smileyface;
    Rectangle rect_smiley;
    Texture helloworld;
    Rectangle rect_hello;
    OrthographicCamera camera;
    SpriteBatch batch;

    @Override
    public void create() {
        camera = new OrthographicCamera();
        camera.setToOrtho(false, CAMERA_WIDTH, CAMERA_HEIGHT); // the camera is like a window into our game world
        batch = new SpriteBatch();

        /** Instantiate smiley face image **/
        smileyface = new Texture(Gdx.files.internal("128px-Yellow_Happy.jpg"));
        rect_smiley = new Rectangle();
        rect_smiley.width = 128; // "Yellow_Happy.jpg" is 128x128 pixels
        rect_smiley.height = 128;
        rect_smiley.x = (CAMERA_WIDTH / 2) - (rect_smiley.width / 2); // center the image horizontally
        rect_smiley.y = (CAMERA_HEIGHT / 2) - (rect_smiley.height / 2); // center the image vertically

        /** Instantiate hello world image **/
        helloworld = new Texture(Gdx.files.internal("helloworld.png"));
        rect_hello = new Rectangle();
        rect_hello.width = 256; // "helloworld.png" is 256x64 pixels
        rect_hello.height = 64;
        rect_hello.x = (CAMERA_WIDTH / 2) - (rect_hello.width / 2); // center the image horizontally
        rect_hello.y = rect_smiley.y + 200; // place helloworld just above the smiley face
    }

    @Override
    public void dispose() {
        // TODO Auto-generated method stub

    }

    @Override
    public void pause() {
        // TODO Auto-generated method stub

    }

    @Override
    public void render() {
        Gdx.gl.glClearColor(0.199f, 0.398f, 0.598f, 0.4f); // OpenGL code to make the screen blue
        Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT); // OpenGL code to clear the screen
        camera.update();

        /** Render the smileyface image and helloworld image **/
        batch.setProjectionMatrix(camera.combined);
        batch.begin();
        batch.draw(smileyface, rect_smiley.x, rect_smiley.y);
        batch.draw(helloworld, rect_hello.x, rect_hello.y);
        batch.end();

        /** Simple technique to detect user input on the touch screen **/
        if (Gdx.input.isTouched()) {
            Vector3 touchPos = new Vector3();
            touchPos.set(Gdx.input.getX(), Gdx.input.getY(), 0);
            camera.unproject(touchPos);

            /** center the smiley face on the touch (x,y) coordinates **/
            rect_smiley.x = touchPos.x - 128 / 2;
            rect_smiley.y = touchPos.y - 128 / 2;
        }
    }

    @Override
    public void resize(int arg0, int arg1) {
        // TODO Auto-generated method stub

    }

    @Override
    public void resume() {
        // TODO Auto-generated method stub

    }

}