(#18): add pixels to viewport + scaling to meters

frontend/core/src/com/game/tankwars/TankWarsGame.java

@@ -3,39 +3,20 @@
 */
 package com.game.tankwars;
 
-import com.badlogic.gdx.ApplicationAdapter;
 import com.badlogic.gdx.Game;
-import com.badlogic.gdx.Gdx;
-import com.badlogic.gdx.Input;
-import com.badlogic.gdx.graphics.GL20;
-import com.badlogic.gdx.graphics.OrthographicCamera;
-import com.badlogic.gdx.graphics.Texture;
-import com.badlogic.gdx.graphics.g2d.Sprite;
 import com.badlogic.gdx.graphics.g2d.SpriteBatch;
-import com.badlogic.gdx.math.Interpolation;
-import com.badlogic.gdx.graphics.OrthographicCamera;
-import com.badlogic.gdx.graphics.Texture;
 import com.badlogic.gdx.graphics.g2d.BitmapFont;
-import com.badlogic.gdx.graphics.g2d.SpriteBatch;
-import com.badlogic.gdx.graphics.g2d.freetype.FreeTypeFontGenerator;
-import com.badlogic.gdx.math.Vector2;
-import com.badlogic.gdx.math.Vector3;
-import com.badlogic.gdx.physics.box2d.Body;
-import com.badlogic.gdx.physics.box2d.Box2DDebugRenderer;
-import com.badlogic.gdx.physics.box2d.World;
-import com.badlogic.gdx.utils.Array;
-import com.badlogic.gdx.utils.ScreenUtils;
-import com.game.tankwars.model.Box2dWorld;
-import com.game.tankwars.model.Bullet;
-import com.game.tankwars.model.Tank;
 import com.game.tankwars.view.LoginScreen;
-import com.game.tankwars.view.MainMenuScreen;
 
 public class TankWarsGame extends Game {
 
+	public static final float SCALE = 10;
 	public static int VIEWPORT_WIDTH = 80;
 	public static int VIEWPORT_HEIGHT = 50;
 
+	public static final int GAMEPORT_WIDTH = 720;
+	public static final int GAMEPORT_HEIGHT = 480;
+
 	private SpriteBatch batch;
 	private BitmapFont font;