Matching syntax to the code in the tutorial codebase repo

concepts/animation.md

@@ -62,7 +62,8 @@ now we need to take a look at our spritesheet and check which frames correspond
 once we have that jotted down we can in setup method instantiate Spritesheet and AnimationAction
 
 ```go
-func (*DefaultScene) Setup(w *ecs.World)) {
+func (*myScene) Setup(u engo.Updater) {
+	world, _ := u.(*ecs.World)
   game.AddSystem(&engo.RenderSystem{})
   game.AddSystem(&engo.AnimationSystem{})
 

tutorials/_posts/2016-04-10-first-system.md

@@ -76,7 +76,8 @@ the `Entity` we created in the last tutorial.
 {% highlight go %}
 // Setup is called before the main loop starts. It allows you
 // to add entities and systems to your Scene.
-func (*myScene) Setup(world *ecs.World) {
+func (*myScene) Setup(u engo.Updater) {
+	world, _ := u.(*ecs.World)
 	common.SetBackground(color.White)
 	world.AddSystem(&common.RenderSystem{})
 
@@ -108,7 +109,8 @@ First, we need to tell the Engo to listen for the F1 key press. We'll do this by
 
 Add the following line to the `Setup` function for your `Scene`.
 {% highlight go %}
-func (*myScene) Setup(world *ecs.World) {
+func (*myScene) Setup(u engo.Updater) {
+	world, _ := u.(*ecs.World)
 	engo.Input.RegisterButton("AddCity", engo.KeyF1)
 	common.SetBackground(color.White)
 	world.AddSystem(&common.RenderSystem{})
@@ -214,7 +216,8 @@ The first thing you want to do, is add the `MouseSystem` to your `Scene`:
 
 {% highlight go %}
 // Setup is called before the main loop starts. It allows you to add entities and systems to your Scene.
-func (*myGame) Setup(world *ecs.World) {
+func (*myScene) Setup(u engo.Updater) {
+	world, _ := u.(*ecs.World)
 	engo.Input.RegisterButton("AddCity", engo.F1)
 	common.SetBackground(color.White)
 

tutorials/_posts/2016-04-11-camera-movement.md

@@ -37,7 +37,8 @@ The `KeyboardScroller` is another System - one that listens for keyboard input a
 Let's add one in the `Setup` function of our game:
 {% highlight go %}
 // Setup is called before the main loop starts. It allows you to add entities and systems to your Scene.
-func (*myScene) Setup(world *ecs.World) {
+func (*myScene) Setup(u engo.Updater) {
+	world, _ := u.(*ecs.World)
 	engo.SetBackground(color.White)
 
 	world.AddSystem(&engo.MouseSystem{})