libgdx – drag current physique to a different place?

You have to set the remodel of the Physique to maneuver it to the desired coordinates:

physique.setTransform(place.x, place.y, physique.getAngle());

Doing that may snap the Physique to the coordinates and offers you an correct approach of dragging the Physique, however beware that the simulation may be unstable in some eventualities as you’re shifting issues explicity as a substitute of utilizing forces and velocities (normally it is effective although).

The complete supply for the instance above is:

public class SandboxGame extends ApplicationAdapter {

    personal OrthographicCamera digicam;
    personal World world;
    personal Box2DDebugRenderer debugRenderer;
    personal Physique physique;
    personal Physique kinematicBody;
    personal Physique floor;

    personal Vector3 unprojectVector = new Vector3();
    personal Vector2 worldTouchPosition = new Vector2();

    @Override
    public void create () {
        float aspectRatio = (float)Gdx.graphics.getWidth() / Gdx.graphics.getHeight();
        float w = 100.0f;
        digicam = new OrthographicCamera(w, w / aspectRatio);
        world = new World(new Vector2(0, -80), false);
        debugRenderer = new Box2DDebugRenderer();

        // Create physique
        {
            PolygonShape form = new PolygonShape();
            form.setAsBox(4, 4);
            FixtureDef fixtureDef = new FixtureDef();
            fixtureDef.form = form;
            fixtureDef.density = 1.0f;
            BodyDef bodyDef = new BodyDef();
            bodyDef.kind = BodyDef.BodyType.DynamicBody;
            physique = world.createBody(bodyDef);
            physique.createFixture(fixtureDef);
            form.dispose();
        }

        // Create kinematic physique
        {
            PolygonShape form = new PolygonShape();
            form.setAsBox(4, 2);
            FixtureDef fixtureDef = new FixtureDef();
            fixtureDef.form = form;
            fixtureDef.density = 1.0f;
            BodyDef bodyDef = new BodyDef();
            bodyDef.kind = BodyDef.BodyType.KinematicBody;
            kinematicBody = world.createBody(bodyDef);
            kinematicBody.createFixture(fixtureDef);
            kinematicBody.setTransform(-20, 0, 0);
            form.dispose();
        }

        // Create floor
        {
            PolygonShape form = new PolygonShape();
            form.setAsBox(100, 2);
            FixtureDef fixtureDef = new FixtureDef();
            fixtureDef.form = form;
            fixtureDef.density = 1.0f;
            BodyDef bodyDef = new BodyDef();
            bodyDef.kind = BodyDef.BodyType.StaticBody;
            floor = world.createBody(bodyDef);
            floor.createFixture(fixtureDef);
            floor.setTransform(0, -20, 0);
            form.dispose();
        }

        Gdx.enter.setInputProcessor(new InputAdapter() {
            public boolean touchDragged(int screenX, int screenY, int pointer) {
                Vector2 place = unproject(screenX, screenY);
                kinematicBody.setTransform(place.x, place.y, kinematicBody.getAngle());
                return false;
            }
        });
    }

    @Override
    public void render () {
        world.step(Gdx.graphics.getDeltaTime(), 6, 6);
        digicam.replace();
        ScreenUtils.clear(Colour.BLACK);
        debugRenderer.render(world, digicam.mixed);
    }

    personal Vector2 unproject(int screenX, int screenY) {
        digicam.unproject(unprojectVector.set(screenX, screenY, 1));
        worldTouchPosition.set(unprojectVector.x, unprojectVector.y);
        return worldTouchPosition;
    }
}