Example usage for com.badlogic.gdx.physics.box2d World setContactFilter

Introduction

In this page you can find the example usage for com.badlogic.gdx.physics.box2d World setContactFilter.

Prototype

public void setContactFilter(final ContactFilter filter) 

Source Link

Document

Register a contact filter to provide specific control over collision.

Usage

From source file:com.badlogic.gdx.tests.box2d.OneSidedPlatform.java

License:Apache License

@Override
protected void createWorld(World world) {
    {/*from  www.  j a  v  a2  s . c  o  m*/
        BodyDef bd = new BodyDef();
        Body ground = world.createBody(bd);

        EdgeShape shape = new EdgeShape();
        shape.set(new Vector2(-20.0f, 0), new Vector2(20.0f, 0f));
        ground.createFixture(shape, 0);
        shape.dispose();
    }

    {
        BodyDef bd = new BodyDef();
        bd.position.set(0, 10);
        Body body = world.createBody(bd);

        PolygonShape shape = new PolygonShape();
        shape.setAsBox(3, 0.5f);
        m_platform = body.createFixture(shape, 0);
        m_bottom = 10.0f - 0.5f;
        m_top = 10.0f + 0.5f;
    }

    {
        BodyDef bd = new BodyDef();
        bd.type = BodyType.DynamicBody;
        bd.position.set(0, 12);
        Body body = world.createBody(bd);

        m_radius = 0.5f;
        CircleShape shape = new CircleShape();
        shape.setRadius(m_radius);
        m_character = body.createFixture(shape, 20.0f);
        shape.dispose();

        m_state = State.Unknown;
    }

    world.setContactFilter(new ContactFilter() {

        @Override
        public boolean shouldCollide(Fixture fixtureA, Fixture fixtureB) {
            if ((fixtureA == m_platform && fixtureB == m_character)
                    || (fixtureA == m_platform && fixtureB == m_character)) {
                Vector2 position = m_character.getBody().getPosition();
                if (position.y < m_top + m_radius - 3.0f * 0.005f)
                    return false;
                else
                    return true;
            } else
                return true;
        }

    });
}

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