ImpactJS + Box2D: Draw world body vertex positions

gistfile1.txt

ig.system.context.save();
ig.system.context.fillStyle = '#A6E22E';
var radius = 3 * ig.system.scale;
for (var body = ig.world.GetBodyList(); body; body = body.GetNext()) {
    for (var fixture = body.GetFixtureList(); fixture; fixture = fixture.GetNext()) {
        var shape = fixture.GetShape();
        if (shape.GetType() == Box2D.Collision.Shapes.b2Shape.e_polygonShape) {
            var poly = shape;
            poly.GetVertices().forEach(function(vertex) {
                var pos = body.GetWorldPoint(vertex.Copy());
                var centerX = (pos.x/Box2D.SCALE) * ig.system.scale;
                var centerY = (pos.y/Box2D.SCALE) * ig.system.scale;
                ig.system.context.beginPath();
                ig.system.context.arc(centerX, centerY, radius, 0, 2 * Math.PI, false);
                ig.system.context.fill();
            });
        }
    }
}
ig.system.context.restore();