CODEWITHSUNDEEP
javaandroideclipselibgdx
DieJay
DieJay

Reputation: 95

How to manage resolutions with libGdx on Android 2.2?

I tried everything I could, but my libgdx application won't scale down on android 2.2. It displays a full image of 640x480 on a screen of only 480x320. Here's the code I got so far;

private static final int VIRTUAL_WIDTH = 640;
private static final int VIRTUAL_HEIGHT = 480;
private static final float ASPECT_RATIO = (float)VIRTUAL_WIDTH/(float)VIRTUAL_HEIGHT;

public static Texture BMP_BACKGROUND;

public static Rectangle viewport;
public static OrthographicCamera camera;
public static SpriteBatch batch;

public void create()
{
  float w = Gdx.graphics.getWidth();
  float h = Gdx.graphics.getHeight();

  BMP_BACKGROUND = new Texture(Gdx.files.internal("data/bmpSpaceBackground.png"));
  BMP_BACKGROUND.setFilter(TextureFilter.Nearest, TextureFilter.Nearest);

  batch = new SpriteBatch();
  camera = new OrthographicCamera(VIRTUAL_WIDTH, VIRTUAL_HEIGHT);
}

@Override
public void dispose()
{
  batch.dispose();
  BMP_BACKGROUND.dispose();
}

@Override
public void render()
{
  camera.update();
  camera.apply(Gdx.gl10);

  // set viewport
  Gdx.gl.glViewport((int) viewport.x, (int) viewport.y,
                    (int) viewport.width, (int) viewport.height);

  Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);

  batch.draw(BMP_BACKGROUND, 0, 0);

  Game.run();
}

public void resize(int width, int height)
{
  float aspectRatio = (float)width/(float)height;
  float scale = 1f;
  Vector2 crop = new Vector2(0f, 0f);
  if(aspectRatio > ASPECT_RATIO)
  {
      scale = (float)height/(float)VIRTUAL_HEIGHT;
      crop.x = (width - VIRTUAL_WIDTH*scale)/2f;
  }
  else if(aspectRatio < ASPECT_RATIO)
  {
      scale = (float)width/(float)VIRTUAL_WIDTH;
      crop.y = (height - VIRTUAL_HEIGHT*scale)/2f;
  }
  else
  {
      scale = (float)width/(float)VIRTUAL_WIDTH;
  }

  float w = (float)VIRTUAL_WIDTH*scale;
  float h = (float)VIRTUAL_HEIGHT*scale;
  viewport = new Rectangle((int)crop.x, (int)crop.y, (int)w, (int)h);
}

Anyone can tell me what I'm doing wrong?

Upvotes: 0

Views: 1140

Answers (1)

bemeyer
bemeyer

Reputation: 6221

Try this

public void resize(int width, int height)
{
        cam.viewportHeight = height; //set the viewport
        cam.viewportWidth = width; 
        if (Config.VIRTUAL_VIEW_WIDTH / cam.viewportWidth < Config.VIRTUAL_VIEW_HEIGHT
                / cam.viewportHeight) {
//sett the right zoom direct
            cam.zoom = Config.VIRTUAL_VIEW_HEIGHT / cam.viewportHeight;
        } else {
//sett the right zoom direct
            cam.zoom = Config.VIRTUAL_VIEW_WIDTH / cam.viewportWidth;
        }
        cam.update(); 
}

This does work and i can work with the virutal resolution. But dont forget to set the camera of your stage you are using! Else it does have no effect!
stage.setCamera(camera).
if you have done that you can work with the virtual resolution inside of your stage.
regards
Your code is 1:1 from an example online.

Upvotes: 2

Related Questions