CODEWITHSUNDEEP
javaandroidlibgdxgame-physics
Mr. Developer
Mr. Developer

Reputation: 3417

addAction always rotates the actor origin 0,0, why?

My code (libgdx):

@Override
public void create () {
    stage = new Stage();
    Gdx.input.setInputProcessor(stage);

    texture = new Texture(Gdx.files.internal("image.png"));
    TextureRegion region = new TextureRegion(texture,256,128);

    Image actor = new Image(region);
    actor.setPosition(Gdx.graphics.getWidth()/2, Gdx.graphics.getHeight()/2);
    actor.setOrigin(actor.getWidth()/2, actor.getHeight()/2);

    group = new Group();
    group.addActor(actor);
    stage.addActor(group);

}

@Override
public void render () {
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
    stage.act(Gdx.graphics.getDeltaTime());
    stage.draw();


    if(Gdx.input.isButtonPressed(Input.Buttons.LEFT)){
        if(Gdx.input.getX() < Gdx.graphics.getWidth() / 2)
        {
            group.addAction(parallel(rotateBy(1,1)));
        }
        else
        {
            group.addAction(parallel(rotateBy(-1,1)));
        }
    }
}

Hi, i use LibGdx and my problem is that I would like to rotate on the same object , but when I start the rotation , I turn around point 0.0 in the lower left.

enter image description here

I can not understand why ... someone can explain how to do ?

Thank You

Upvotes: 1

Views: 73

Answers (2)

Angel Angel
Angel Angel

Reputation: 21728

September origin of the group not the actor you add the group to this case:

    group.addActor(actor);

    group.setPosition(Gdx.graphics.getWidth()/2, Gdx.graphics.getHeight()/2);
    group.setOrigin(group.getWidth()/2, group.getHeight()/2);

    stage.addActor(group);

secondly, that API're using? or is the method, parallel or rotateBy created by you, anyway you can use this haver works for you as you pretend.

group.addAction(Actions.parallel(Actions.rotateBy(1,1)));

P.S: if it works, the response of Kareem Hammad was my first answer, haha, but already had published.

Upvotes: 1

Kareem Hammad
Kareem Hammad

Reputation: 36

you're rotating the group not the actor so try this set the origin of the group to group.setOrigin(group.getWidth()/2, group.getHeight()/2);

Upvotes: 2

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