comments and more tidy

engine/debug.go

@@ -29,9 +29,6 @@ type DebugToast struct {
 }
 
 func (d *DebugToast) Draw(screen *ebiten.Image, _ ebiten.DrawImageOptions) {
-	if d.Hidden {
-		return
-	}
 	ebitenutil.DebugPrintAt(screen, d.Text, d.Pos.X, d.Pos.Y)
 }
 
@@ -58,9 +55,6 @@ type PerfDisplay struct {
 }
 
 func (p PerfDisplay) Draw(screen *ebiten.Image, _ ebiten.DrawImageOptions) {
-	if p.Hidden {
-		return
-	}
 	ebitenutil.DebugPrint(screen, fmt.Sprintf("TPS: %0.2f  FPS: %0.2f", ebiten.CurrentTPS(), ebiten.CurrentFPS()))
 }
 

engine/interface.go

@@ -75,9 +75,9 @@ type Disabler interface {
 	Enable()
 }
 
-// Drawer components can draw themselves. Draw is called often.
+// Drawer components can draw themselves. Draw is called often. Each component
-// Each component is responsible for calling Draw on its child components
+// must call Draw on any internal components not known to the engine (i.e. not
-// (so that hiding the parent can hide the children, etc).
+// passed to Game.Register or returned from Scan).
 type Drawer interface {
 	Draw(screen *ebiten.Image, opts ebiten.DrawImageOptions)
 	DrawOrder() float64
@@ -167,9 +167,9 @@ type Transformer interface {
 	Transform() ebiten.DrawImageOptions
 }
 
-// Updater components can update themselves. Update is called repeatedly.
+// Updater components can update themselves. Update is called repeatedly. Each
-// Each component is responsible for calling Update on its child components
+// component must call Update on any internal components not known to the engine
-// (so that disabling the parent prevents updates to the children, etc).
+//  (i.e. not passed to Game.Register or returned from Scan).
 type Updater interface {
 	Update() error
 }

engine/scene.go

@@ -21,7 +21,6 @@ type Scene struct {
 	Components []interface{}
 	Disabled
 	Hidden
-	ZOrder
 }
 
 /*

engine/sceneref.go

@@ -62,9 +62,6 @@ func (r SceneRef) Disable() { r.scene.Disable() }
 // Enable calls Enable on the scene.
 func (r SceneRef) Enable() { r.scene.Enable() }
 
-// DrawOrder returns the value of DrawOrder from the scene.
-func (r SceneRef) DrawOrder() float64 { return r.scene.DrawOrder() }
-
 // IsHidden returns the value of IsHidden from the scene.
 func (r SceneRef) IsHidden() bool { return r.scene.IsHidden() }