Xtykutl

I want to use map in my app and do move, scale and rotation on it using libGDX library, I'm using this code to scale camera in android:

public class MyGdxGame extends ApplicationAdapter implements GestureDetector.GestureListener {

    SpriteBatch batch;

    Texture texture;

    Sprite sprite;

    OrthographicCamera camera;



    @Override

    public void create() {

        batch = new SpriteBatch();



        camera = new OrthographicCamera(Gdx.graphics.getWidth(), Gdx.graphics.getHeight());

        texture = new Texture(Gdx.files.internal("map.jpg"));

        sprite = new Sprite(texture);

        sprite.setPosition(-sprite.getWidth() / 2, -sprite.getHeight() / 2);



        Gdx.input.setInputProcessor(new GestureDetector(this));

    }



    @Override

    public void render() {

        Gdx.gl.glClearColor(1, 1, 1, 1);

        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

        camera.update();

        batch.setProjectionMatrix(camera.combined);

        batch.begin();

        sprite.draw(batch);

        batch.end();

    }



    @Override

    public void dispose() {

        batch.dispose();

        texture.dispose();

    }



    @Override

    public boolean pan(float x, float y, float deltaX, float deltaY) {

        camera.translate(-deltaX, deltaY);

        return false;

    }





    @Override

    public boolean zoom(float initialDistance, float distance) {

        float scale = initialDistance / distance;

        camera.zoom = scale;

        return false;

    }







}

It is zooming correctly, but when I touch up and try to zoom again it begin zoom from scale = 1.
How can zoom the cam and save its status?

I don't have any experience in zooming with LibGDX, but an idea would be saving the initialDistance in a variable and use it instead of the original one (expect for the first time to get the initial value).

@Override

public boolean zoom(float initialDistance, float distance) {

    if(savedDistance == 0)

        savedDistance = initialDistance



    float scale = savedDistance / distance;

    camera.zoom = scale;

    return false;

}

If this doesn't help, reading the docs or looking into the source code could give you an idea.