Physics Joints - Learn SpriteBuilder for iOS Game Development - page 284

Figure 9-3 . The chain with the ball properly arranged
Select a chainball_chain2 in the Timeline, and set its position to 0x0 . This will be the top-
most chain element. Now select a chainball_chain1 sprite in the Timeline, and set its posi-
tion to 0x-24 . This should make it look like it hooks perfectly into the first chain. Repeat
this process for the remaining four chains, alternating chain1 and chain2 so that they look
like Figure 9-3 and decreasing the Y position for every chain element by another -24
points. The chain element's Y positions from top to bottom should be 0, -24, -48, -72,
-96, and -120. The ball's Y position should be -178.
Since the chain1 sprites should be drawn on top of all chain2 sprites, you need to move
the chain1 sprites below the chain2 sprites in the Timeline to ensure their draw order is
correct. The ball is supposed to be drawn underneath the last chain1 sprite, so it's best to
move the ball just between the chain2 and chain1 sprites. Also, just because it seems more
natural, you may want to move the hook node to the very top.