Physics Joints - Learn SpriteBuilder for iOS Game Development - page 282

Creating a Chain
You are probably eager to get going, so let's dive right in.
Right-click the Prefabs folder in SpriteBuilder's File View and select New File . Create a
document of type Node , and name it Chain.ccb . Now switch to the Tileless Editor View ,
ensure the GameElements entry below the Tileless Editor View is selected, and confirm it
contains the images shown in Figure 9-2 .
Figure 9-2 . The chain and spring images
If the chain and spring images aren't there, you'll find them in the GameElements folder
of the Graphics archive. Drag and drop the PNG images whose names start with chainball
and springboard into the GameElements Sprite Sheet in SpriteBuilder before proceeding.
Alternatively, use your own images. Just to give you a size reference, the chainball image
is 416x416 pixels and the springboard is 254x234 pixels, making these images much
smaller than the gear and saw.
Setting Up the Chain Sprites
Drag and drop two chainball chain images onto the Chain.ccb stage, one of each kind.
One looks like the lowercase letter l ( chainball_chain1.png ), and the other looks like an 8
( chainball_chain2.png ). I will refer to them as simply the letter I chain and letter 8 chain
images. They are the two rightmost images in the first row in Figure 9-2 . Also, drag and