import Box2D 2.0 Body { id: body property alias fixture: circle property alias density: circle.density property alias friction: circle.friction property alias restitution: circle.restitution property alias sensor: circle.sensor property alias categories: circle.categories property alias collidesWith: circle.collidesWith property alias groupIndex: circle.groupIndex property alias x: circle.x property alias y: circle.y property alias radius: circle.radius signal beginContact(Fixture other) signal endContact(Fixture other) Circle { id: circle onBeginContact: body.beginContact(other) onEndContact: body.endContact(other) } }