Cycript Graviboard... mostly

s = [SBIconController sharedInstance];
l = s.currentRootIconList;
icons = [NSMutableArray array];
for (var i = 0; i < l.icons.length; i++) {
    [icons addObject:[l viewForIcon:l.icons[i]]];
}

// icons = choose(SBIconView); works, but doesn't, because superview

animator = [[UIDynamicAnimator alloc] initWithReferenceView:icons[0].superview];

collisionBehavior = [[UICollisionBehavior alloc] initWithItems:icons];
[collisionBehavior setTranslatesReferenceBoundsIntoBoundary:YES];
[animator addBehavior:collisionBehavior];

// Graviboard... mostly
gravityBehavior = [[UIGravityBehavior alloc] initWithItems:icons];
gravityBehavior.gravityDirection = {0:0.0, 1:0.2};
[animator addBehavior:gravityBehavior];


// 1: fizyx demo
forcePush = [[UIPushBehavior alloc] initWithItems:@[icons[0]] mode:1];      // mode 1, instantaneous
forcePush.angle = Math.random() * 2.0;
forcePush.magnitude = 30;
forcePush.active = YES;
[animator addBehavior:forcePush];


// 2: reset fizyx
[animator removeBehavior:forcePush];


// 3... EXPLOSIONS
pushes = [NSMutableArray array];

for (var i = 0; i < icons.length; i++) {
    pushBehavior = [[UIPushBehavior alloc] initWithItems:@[icons[i]] mode:1]; // 1 == UIPushBehaviorModeInstantaneous
    [animator addBehavior:pushBehavior];

    [pushes addObject:pushBehavior];
}

function explode() {
    for (var i = 0; i < pushes.length; i++) {
        pushBehavior = pushes[i];
        pushBehavior.angle = Math.random() * 2.0;
        pushBehavior.magnitude = 30;
        pushBehavior.active = YES;
    }
}