pmpd.mass2D 2D mass. This object's inlet need forces, and outlet it's position. All forces send to it's inlet are add together. A bang allow the mass to compute it's new position, and to output it. The mass can move due to it's inertia. This is like the 1D object, but forces / displacement append in 2D.	from the library : PMPD Format : External Environment : max freeware Max 4.5 / 4.x http://www.mathieuchamagne.com/?p=13 http://drpichon.free.fr/pmpd/