How to zoom in and out on stage in libgdx Scene2d?
I am making a 2d game using libgdx and add hexagon actors to the group, which is then added to the stage. For a normal camera, you can use the camera.zoom
render method to zoom in and out along with camera.translate
to pan around the world.
I get the camera used by the scene using stage.getCamera()
and I can still call stage.getcamera().translate
but there is no option stage.getCamera().zoom
.
Here is my code:
//import statements
public class HexGame implements ApplicationListener{
private Stage stage;
private Texture hexTexture;
private Group hexGroup;
private int screenWidth;
private int screenHeight;
@Override
public void create() {
hexTexture = new Texture(Gdx.files.internal("hex.png"));
screenHeight = Gdx.graphics.getHeight();
screenWidth = Gdx.graphics.getWidth();
stage = new Stage(new ScreenViewport());
hexGroup = new HexGroup(screenWidth,screenHeight,hexTexture);
stage.addActor(hexGroup);
}
@Override
public void dispose() {
stage.dispose();
hexTexture.dispose();
}
@Override
public void render() {
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
stage.act(Gdx.graphics.getDeltaTime());
stage.draw();
handleInput();
stage.getCamera().update();
}
private void handleInput() {
if (Gdx.input.isKeyPressed(Input.Keys.LEFT)) {
stage.getCamera().translate(-3, 0, 0);
}
if (Gdx.input.isKeyPressed(Input.Keys.RIGHT)) {
stage.getCamera().translate(3, 0, 0);
}
if (Gdx.input.isKeyPressed(Input.Keys.DOWN)) {
stage.getCamera().translate(0, -3, 0);
}
if (Gdx.input.isKeyPressed(Input.Keys.UP)) {
stage.getCamera().translate(0, 3, 0);
}
//This is the part that doesn't work
/*
if (Gdx.input.isKeyPressed(Input.Keys.Z)) {
stage.getCamera().zoom += 0.02;
}
*/
}
@Override
public void resize(int width, int height) {
stage.getViewport().update(width, height);
}
@Override
public void pause() {
}
@Override
public void resume() {
}
}
Any help is appreciated and if there is anything else wrong with my code please let me know, I am new to libgdx. Thanks to
source to share
Scale is available in class OrthographicCamera
and by default Stage
class create aOrthographicCamera
/** Creates a stage with a {@link ScalingViewport} set to {@link Scaling#stretch}. The stage will use its own {@link Batch}
* which will be disposed when the stage is disposed. */
public Stage () {
this(new ScalingViewport(Scaling.stretch, Gdx.graphics.getWidth(), Gdx.graphics.getHeight(), new OrthographicCamera()),
new SpriteBatch());
ownsBatch = true;
}
So, you need to give the camera to OrthographicCamera
:
((OrthographicCamera)stage.getCamera()).zoom += 0.02f;
source to share