Minor tweaks to flygoblin.

elements/flygoblin.go

@@ -0,0 +1,178 @@
+package elements
+
+import (
+	"image"
+	"image/color"
+	"mover/assets"
+	"mover/gamedata"
+
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+type FlyGoblin struct {
+	Sprite         *ebiten.Image
+	Maks           *ebiten.Image
+	MaksDest       *ebiten.Image
+	position       gamedata.Coordinates
+	target         gamedata.Coordinates
+	state          gamedata.EnemyState
+	cycle          int
+	health         int
+	dyingcount     int
+	damageduration int
+	right          bool
+	hit            bool
+	touched        bool
+	toggle         bool
+	sploding       bool
+	damage         bool
+}
+
+func NewFlyGoblin() *FlyGoblin {
+	fg := &FlyGoblin{
+		Sprite:         ebiten.NewImage(96, 96),
+		Maks:           ebiten.NewImage(96, 96),
+		MaksDest:       ebiten.NewImage(96, 96),
+		health:         100,
+		damageduration: 0,
+	}
+	fg.Maks.Fill(color.White)
+	return fg
+}
+
+func (f *FlyGoblin) Update() error {
+
+	if f.damage {
+		f.damageduration++
+		if f.damageduration > 30 {
+			f.damage = false
+			f.damageduration = 0
+		}
+	}
+
+	if f.state < gamedata.EnemyStateDying {
+		dx := f.target.X - f.position.X
+		dy := f.target.Y - f.position.Y
+
+		f.right = dx/48 > 0
+
+		f.position.X += dx / 48
+		f.position.Y += dy / 48
+
+	}
+
+	f.cycle++
+	return nil
+}
+
+func (f *FlyGoblin) Draw() {
+	f.Sprite.Clear()
+	f.MaksDest.Clear()
+
+	idx := (f.cycle / 8) % 4
+	x0 := 96 * idx
+	x1 := x0 + 96
+	y0 := 0
+	y1 := 96
+
+	op := &ebiten.DrawImageOptions{}
+	if f.right {
+		op.GeoM.Scale(-1, 1)
+		op.GeoM.Translate(MOVER_WIDTH*2, 0)
+	}
+
+	switch f.state {
+	case gamedata.EnemyStateDefault:
+		if !f.toggle {
+			f.Sprite.DrawImage(assets.ImageBank[assets.Worm].SubImage(image.Rect(x0, y0, x1, y1)).(*ebiten.Image), op)
+		} else {
+			f.Sprite.DrawImage(assets.ImageBank[assets.WormDamaged].SubImage(image.Rect(x0, y0, x1, y1)).(*ebiten.Image), op)
+		}
+	case gamedata.EnemyStateHit:
+		if (f.cycle/5)%2 == 0 && f.damage {
+			f.MaksDest.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
+			f.MaksDest.DrawImage(f.Maks, op)
+			f.Sprite.DrawImage(f.MaksDest, nil)
+		} else {
+			f.Sprite.DrawImage(assets.ImageBank[assets.WormDamaged].SubImage(image.Rect(x0, y0, x1, y1)).(*ebiten.Image), op)
+		}
+	case gamedata.EnemyStateExploding:
+		op.GeoM.Scale(2, 2)
+		//op.GeoM.Translate(-48, -48)
+		f.Sprite.DrawImage(assets.ImageBank[assets.FlyEyeDying].SubImage(image.Rect(x0, y0, x1, y1)).(*ebiten.Image), op)
+		if idx == 3 {
+			f.state = gamedata.EnemyStateDead
+		}
+	}
+
+}
+
+func (f *FlyGoblin) GetPosition() gamedata.Coordinates {
+	return f.position
+}
+
+func (f *FlyGoblin) SetPosition(pos gamedata.Coordinates) {
+	f.position = pos
+}
+
+func (f *FlyGoblin) SetTarget(target gamedata.Coordinates) {
+	f.target = target
+}
+
+func (f *FlyGoblin) GetSprite() *ebiten.Image {
+	return f.Sprite
+}
+
+func (f *FlyGoblin) GetEnemyState() gamedata.EnemyState {
+	return f.state
+}
+
+func (f *FlyGoblin) SetHit() {
+	f.health--
+	f.damage = true
+	f.state = gamedata.EnemyStateHit
+
+	if f.health <= 0 {
+		f.state = gamedata.EnemyStateExploding
+		f.cycle = 0
+	}
+}
+
+func (f *FlyGoblin) SetToggle() {
+	f.toggle = !f.toggle
+
+	if !f.toggle {
+		f.state = gamedata.EnemyStateDefault
+	}
+}
+
+func (f *FlyGoblin) IsToggled() bool {
+	return f.toggle
+}
+
+func (f *FlyGoblin) SetTouched() {
+	f.touched = true
+}
+
+func (f *FlyGoblin) ClearTouched() {
+	f.touched = false
+}
+
+func (f *FlyGoblin) IsTouched() bool {
+	return f.touched
+}
+
+func (f *FlyGoblin) ExplosionInitiated() bool {
+	return f.sploding
+}
+
+func (f *FlyGoblin) SetExplosionInitiated() {
+	f.sploding = true
+}
+
+func (f *FlyGoblin) Health() int {
+	return f.health
+}