Refactor to use better interfaces and event callbacks.

elements/boss.go

@@ -16,6 +16,8 @@ type Boss struct {
 	Spawned         bool
 	Pos             gamedata.Coordinates
 	Right           bool
+	Health          int
+	Touched         bool
 	damage          bool
 	cycle           int
 	Action          MoverAction
@@ -32,6 +34,8 @@ func NewBoss() *Boss {
 		hitcount: 0,
 		Maks:     ebiten.NewImage(96, 96),
 		MaskDest: ebiten.NewImage(96, 96),
+		Health:   100,
+		Touched:  false,
 	}
 	b.Maks.Fill(color.White)
 	return b
@@ -45,6 +49,9 @@ func (b *Boss) Update() {
 			b.damageduration = 0
 		}
 	}
+	if b.Action == MoverActionDead {
+		b.Spawned = false
+	}
 	b.cycle++
 }
 
@@ -71,15 +78,17 @@ func (b *Boss) Draw() {
 
 	switch b.Action {
 	case MoverActionDefault:
+		b.Sprite.DrawImage(assets.ImageBank[assets.Worm].SubImage(image.Rect(x0, y0, x1, y1)).(*ebiten.Image), op)
+	case MoverActionDamaged:
 		if (b.cycle/5)%2 == 0 && b.damage {
-			b.MaskDest.DrawImage(assets.ImageBank[assets.Worm].SubImage(image.Rect(x0, y0, x1, y1)).(*ebiten.Image), op)
+			b.MaskDest.DrawImage(assets.ImageBank[assets.WormDamaged].SubImage(image.Rect(x0, y0, x1, y1)).(*ebiten.Image), op)
 			op := &ebiten.DrawImageOptions{}
 			op.GeoM.Reset()
 			op.Blend = ebiten.BlendSourceAtop
 			b.MaskDest.DrawImage(b.Maks, op)
 			b.Sprite.DrawImage(b.MaskDest, nil)
 		} else {
-			b.Sprite.DrawImage(assets.ImageBank[assets.Worm].SubImage(image.Rect(x0, y0, x1, y1)).(*ebiten.Image), op)
+			b.Sprite.DrawImage(assets.ImageBank[assets.WormDamaged].SubImage(image.Rect(x0, y0, x1, y1)).(*ebiten.Image), op)
 		}
 	case MoverActionExploding:
 		op.GeoM.Scale(2, 2)
@@ -95,7 +104,9 @@ func (b *Boss) Draw() {
 func (b *Boss) SetHit() {
 	b.hitcount++
 	b.damage = true
-	if b.hitcount > 10 {
+	b.Health--
+
+	if b.Health <= 0 {
 		b.Action = MoverActionExploding
 		b.cycle = 0
 	}
@@ -107,4 +118,13 @@ func (b *Boss) Reset() {
 	b.damageduration = 0
 	b.Action = MoverActionDefault
 	b.Spawned = false
+	b.Health = 100
+}
+
+func (b *Boss) ToggleColor() {
+	if b.Action == MoverActionDefault {
+		b.Action = MoverActionDamaged
+	} else if b.Action == MoverActionDamaged {
+		b.Action = MoverActionDefault
+	}
 }