Sprite Kit Scenes and SKNode Positioning - Beginning Swift Games Development for iOS - page 32

Figure 2-9 . SKSpriteNode's anchor point unit coordinate system
This figure shows an SKSpriteNode 's anchor point coordinate system. Notice the dot
at position (0.5, 0.5). This is the default anchor point. Take a look at Figure 2-10 to see
some common anchor points.
Figure 2-10 . An SKSpriteNode's some example anchor points
In this figure there are four common anchor points as they relate to the sprites they are ap-
plied to. Looking at these examples, you can see that if you want to position the play-
erNode at the top-rightmost position of the scene and still have the entire spriteNode
visible in the scene, then you would need to set the sprite's anchorPoint property to
(1.0, 1.0). Do that now by adding the following line of code directly after playerNode 's
construction.
playerNode!.anchorPoint = CGPoint(x: 1.0, y: 1.0)
Now run the application once more. You will now see the entire playerNode positioned
at the top right of the scene, as shown in Figure 2-11 .