Body:getTransform
Get the position and angle of the body.

Note that the position may not be the center of mass of the body. An angle of 0 radians will mean 'looking to the right'. Although radians increase counter-clockwise, the y axis points down so it becomes clockwise from our point of view.
x, y, angle = Body:getTransform()
x number The x component of the position.
y number The y component of the position.
angle number The angle in radians.