More comment

engine/game.go

@@ -14,12 +14,12 @@ func init() {
 type Game struct {
 	ScreenWidth  int
 	ScreenHeight int
-	Scene        *Scene
+	*Scene
 
 	componentsByID map[string]interface{}
 }
 
-// Draw draws the entire thing.
+// Draw draws the entire thing, with no geometric transform.
 func (g *Game) Draw(screen *ebiten.Image) {
 	g.Scene.Draw(screen, ebiten.GeoM{})
 }
@@ -29,11 +29,6 @@ func (g *Game) Layout(outsideWidth, outsideHeight int) (w, h int) {
 	return g.ScreenWidth, g.ScreenHeight
 }
 
-// Update just passes the call onto Layers.
-func (g *Game) Update() error {
-	return g.Scene.Update()
-}
-
 // RegisterComponent tells the game there is a new component. Currently this is
 // only necessary for components with IDs.
 func (g *Game) RegisterComponent(c interface{}) {

engine/interface.go

@@ -12,7 +12,8 @@ type Collider interface {
 }
 
 // Drawer components can draw themselves. Draw is called often.
-// Each component is responsible for calling Draw on its child components.
+// Each component is responsible for calling Draw on its child components
+// (so that hiding the parent can hide the children, etc).
 type Drawer interface {
 	Draw(screen *ebiten.Image, geom ebiten.GeoM)
 }
@@ -38,7 +39,8 @@ type Scanner interface {
 }
 
 // Updater components can update themselves. Update is called repeatedly.
-// Each component is responsible for calling Update on its child components.
+// Each component is responsible for calling Update on its child components
+// (so that disabling the parent prevents updates to the children, etc).
 type Updater interface {
 	Update() error
 }