Class RevoluteConstraint

// This will create a revolute constraint between two bodies with pivot point in between them.
var bodyA = new Body({ mass: 1, position: [-1, 0] });
world.addBody(bodyA);

var bodyB = new Body({ mass: 1, position: [1, 0] });
world.addBody(bodyB);

var constraint = new RevoluteConstraint(bodyA, bodyB, {
    worldPivot: [0, 0]
});
world.addConstraint(constraint);

// Using body-local pivot points, the constraint could have been constructed like this:
var constraint = new RevoluteConstraint(bodyA, bodyB, {
    localPivotA: [1, 0],
    localPivotB: [-1, 0]
});