Basic Files

core/src/com/game/Game.java

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+package com.game;
+
+import com.badlogic.gdx.ApplicationAdapter;
+import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.graphics.GL20;
+import com.badlogic.gdx.graphics.OrthographicCamera;
+import com.badlogic.gdx.graphics.Texture;
+import com.badlogic.gdx.graphics.g2d.SpriteBatch;
+import com.game.Misc.Vars;
+import com.game.States.StateManager;
+
+public class Game extends ApplicationAdapter {
+
+	private float accum;
+
+	private SpriteBatch sb;
+	private OrthographicCamera cam;
+	private OrthographicCamera hudCam;
+
+	private StateManager sm;
+
+	@Override
+	public void create () {
+		sb = new SpriteBatch();
+
+		cam = new OrthographicCamera();
+		cam.setToOrtho(false, Vars.SCREEN_WIDTH, Vars.SCREEN_HEIGHT);
+
+		hudCam = new OrthographicCamera();
+		hudCam.setToOrtho(false, Vars.SCREEN_WIDTH, Vars.SCREEN_HEIGHT);
+
+		sm = new StateManager(this);
+	}
+
+	@Override
+	public void resize (int width, int height) {
+	}
+
+	@Override
+	public void render () {
+		accum += Gdx.graphics.getDeltaTime();
+		while (accum >= Vars.STEP) {
+			accum -= Vars.STEP;
+			sm.update(Vars.STEP);
+			sm.render();
+		}
+	}
+
+	@Override
+	public void pause () {
+	}
+
+	@Override
+	public void resume () {
+	}
+
+	@Override
+	public void dispose () {
+		sm.dispose();
+	}
+
+	public SpriteBatch getSpriteBatch() { return sb; }
+	public OrthographicCamera getCam() { return cam; }
+	public OrthographicCamera getHudCam() { return hudCam; }
+}

core/src/com/game/Misc/Vars.java

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+package com.game.Misc;
+
+/**
+ * Created by Ash on 08/02/2016.
+ */
+public class Vars {
+    // Application related
+    public static final String TITLE = "Group Project";
+    public static final int SCREEN_WIDTH = 1280;
+    public static final int SCREEN_HEIGHT = 720;
+    public static final boolean RESIZABLE = false;
+    public static final float FRAMERATE = 60f;
+
+    // Physics related
+    public static final float STEP =  1 / FRAMERATE;
+}

core/src/com/game/States/Menu.java

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+package com.game.States;
+
+/**
+ * Created by Ash on 08/02/2016.
+ */
+public class Menu extends State {
+
+    public Menu(StateManager sm) {
+        super(sm);
+    }
+
+    @Override
+    public void init() {
+
+    }
+
+    @Override
+    public void update(float dt) {
+
+    }
+
+    @Override
+    public void render() {
+
+    }
+
+    @Override
+    public void handleInput() {
+
+    }
+
+    @Override
+    public void dispose() {
+
+    }
+}

core/src/com/game/States/Play.java

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+package com.game.States;
+
+import com.badlogic.gdx.graphics.Texture;
+
+/**
+ * Created by Ash on 08/02/2016.
+ */
+public class Play extends State {
+
+    Texture img;
+
+    public Play(StateManager sm) {
+        super(sm);
+    }
+
+    @Override
+    public void init() {
+        img = new Texture("badlogic.jpg");
+    }
+
+    @Override
+    public void update(float dt) {
+
+    }
+
+    @Override
+    public void render() {
+        sb.setProjectionMatrix(cam.combined);
+        sb.begin();
+        sb.draw(img, 0, 0);
+        sb.end();
+    }
+
+    @Override
+    public void handleInput() {
+
+    }
+
+    @Override
+    public void dispose() {
+        img.dispose();
+    }
+}

core/src/com/game/States/State.java

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+package com.game.States;
+
+import com.badlogic.gdx.graphics.OrthographicCamera;
+import com.badlogic.gdx.graphics.g2d.SpriteBatch;
+import com.game.Game;
+
+/**
+ * Created by Ash on 08/02/2016.
+ */
+public abstract class State {
+    protected StateManager sm;
+    protected Game game;
+
+    protected SpriteBatch sb;
+    protected OrthographicCamera cam;
+    protected OrthographicCamera hudCam;
+
+    public State (StateManager sm)
+    {
+        this.sm = sm;
+        game = sm.game();
+        sb = game.getSpriteBatch();
+        cam = game.getCam();
+        hudCam = game.getHudCam();
+    }
+
+    public abstract void init();
+    public abstract void update(float dt);
+    public abstract void render();
+    public abstract void handleInput();
+    public abstract void dispose();
+
+}

core/src/com/game/States/StateManager.java

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+package com.game.States;
+
+import com.game.Game;
+
+import java.util.HashMap;
+import java.util.Stack;
+
+/**
+ * Created by Ash on 08/02/2016.
+ */
+public class StateManager {
+    private Game game;
+
+    //private Stack<State> states;
+    private HashMap<States, State> states = new HashMap<States, State>();
+
+    private States currentState;
+    public enum States
+    {
+        MENU,
+        PAUSE,
+        PLAY,
+    }
+
+    public StateManager(Game game)
+    {
+        this.game = game;
+        states.put(States.MENU, new Menu(this));
+        states.put(States.PLAY, new Play(this));
+        setState(States.PLAY); // TODO, set to MENU
+    }
+
+    public void update(float dt)
+    {
+        states.get(currentState).update(dt);
+    }
+
+    public void render()
+    {
+        states.get(currentState).render();
+    }
+
+    public void handleInput()
+    {
+        states.get(currentState).handleInput();
+    }
+
+    public void dispose()
+    {
+        states.get(currentState).dispose();
+    }
+
+    // Accessors
+    public Game game() { return game; }
+
+    // Mutators
+    public void setState(States state)
+    {
+        currentState = state;
+        System.out.println("Setting state: " + currentState.name());
+        states.get(currentState).init();
+    }
+}