Disabling auto centering

By default, Matrix.js automatically center objects with the following transform:

translate3d(-50%, -50%, 0)
And every MX.Object3d comes with the class .mx-object3d. Matrix.js will automatically inject/remove the following CSS rules:
.mx-object3d {
    position: absolute;
    top: 50%;
    left: 50%;
}

Sometimes we want to add 3D movement to exsiting DOM nodes without tampering with their positioning. This page shows that you can disable the default centering behaviour by simply setting:

MX.positionAtCenter = false