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package ch.asynk.tankontank.screens;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input;
import com.badlogic.gdx.InputAdapter;
import com.badlogic.gdx.InputMultiplexer;
import com.badlogic.gdx.input.GestureDetector;
import com.badlogic.gdx.input.GestureDetector.GestureAdapter;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.Camera;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.scenes.scene2d.Stage;
import com.badlogic.gdx.scenes.scene2d.ui.Image;
import com.badlogic.gdx.scenes.scene2d.ui.Label;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.math.MathUtils;
import com.badlogic.gdx.utils.viewport.FitViewport;
import com.badlogic.gdx.utils.viewport.ScreenViewport;
import ch.asynk.tankontank.TankOnTank;
public class GameScreen extends AbstractScreen
{
static private final float ZOOM_MAX = 0.2f;
static private final float ZOOM_GESTURE_FACTOR = 300.f;
static private final float ZOOM_SCROLL_FACTOR = 10.0f;
private float maxZoomOut;
final OrthographicCamera cam;
private Image map;
private Label fps;
private Label camInfo;
private Stage hud;
private Stage gameStage;
private Vector2 screenToViewport = new Vector2(); // ratio
private Vector2 dragPos = new Vector2(); // screen coordinates
public GameScreen(final TankOnTank game)
{
super(game);
map = new Image(game.manager.get("images/map_a.png", Texture.class));
fps = new Label("FPS: 0", game.skin);
camInfo = new Label("", game.skin);
fps.setPosition( 10, Gdx.graphics.getHeight() - 40);
camInfo.setPosition( 10, Gdx.graphics.getHeight() - 50);
cam = new OrthographicCamera();
cam.setToOrtho(false);
// cam.position.set((map.getWidth()/2), (map.getHeight()/2), 0);
gameStage = new Stage(new FitViewport(map.getWidth(), map.getHeight(), cam));
gameStage.addActor(map);
hud = new Stage(new ScreenViewport());
hud.addActor(fps);
hud.addActor(camInfo);
Gdx.input.setInputProcessor(getMultiplexer());
}
private InputMultiplexer getMultiplexer()
{
final InputMultiplexer multiplexer = new InputMultiplexer();
multiplexer.addProcessor(new GestureDetector(new GestureAdapter() {
@Override
public boolean zoom(float initialDistance, float distance)
{
cam.zoom += ((initialDistance - distance) / ZOOM_GESTURE_FACTOR);
cam.zoom = MathUtils.clamp(cam.zoom, ZOOM_MAX, maxZoomOut);
clampCameraPos();
return true;
}
}));
multiplexer.addProcessor(new InputAdapter() {
@Override
public boolean touchDragged(int x, int y, int pointer)
{
cam.translate(((dragPos.x - x) * cam.zoom * screenToViewport.x), ((y - dragPos.y) * cam.zoom * screenToViewport.y), 0);
dragPos.set(x, y);
clampCameraPos();
return true;
}
@Override
public boolean touchDown(int x, int y, int pointer, int button)
{
if (button == Input.Buttons.LEFT) {
dragPos.set(x, y);
}
return true;
}
@Override
public boolean scrolled(int amount)
{
cam.zoom += amount / ZOOM_SCROLL_FACTOR;
cam.zoom = MathUtils.clamp(cam.zoom, ZOOM_MAX, maxZoomOut);
clampCameraPos();
return true;
}
});
return multiplexer;
}
private void clampCameraPos()
{
float cx = cam.viewportWidth * cam.zoom / 2f;
float cy = cam.viewportHeight * cam.zoom / 2f;
cam.position.x = MathUtils.clamp(cam.position.x, cx, (map.getWidth() - cx));
cam.position.y = MathUtils.clamp(cam.position.y, cy, (map.getHeight() - cy));
}
@Override
public void render(float delta)
{
Gdx.gl.glClearColor(0, 0, 0.2f, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
cam.update();
fps.setText("FPS: " + Gdx.graphics.getFramesPerSecond() + " zoom: " + String.format("%.2f", cam.zoom));
camInfo.setText("Camera: " + (int) cam.position.y + " ; " + (int) cam.position.y + " x " + String.format("%.2f", cam.zoom));
gameStage.act(delta);
gameStage.draw();
hud.act(delta);
hud.draw();
}
@Override
public void resize(int width, int height)
{
Gdx.app.debug("GameScreen", "resize (" + width + "," + height + ")");
hud.getViewport().update(width, height, true);
gameStage.getViewport().update(width, height);
maxZoomOut = Math.min((map.getWidth() / cam.viewportWidth), (map.getHeight() / cam.viewportHeight));
cam.zoom = MathUtils.clamp(cam.zoom, ZOOM_MAX, maxZoomOut);
screenToViewport.set((cam.viewportWidth / width), (cam.viewportHeight / height));
}
@Override
public void dispose()
{
Gdx.app.debug("GameScreen", "dispose()");
hud.dispose();
gameStage.dispose();
}
@Override
public void show()
{
Gdx.app.debug("GameScreen", "show()");
}
@Override
public void hide()
{
Gdx.app.debug("GameScreen", "hide()");
}
@Override
public void pause()
{
Gdx.app.debug("GameScreen", "pause()");
}
@Override
public void resume()
{
Gdx.app.debug("GameScreen", "resume()");
}
}
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