First commit.

mover.go

@@ -0,0 +1,168 @@
+package main
+
+import (
+	"bytes"
+	"image"
+	"log"
+
+	_ "embed"
+	"image/color"
+	_ "image/png"
+
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+var (
+	flyeyeImage  *ebiten.Image
+	flyeyeImage2 *ebiten.Image
+	flyeyeImage3 *ebiten.Image
+
+	//go:embed fly-eye.png
+	flyeye_img []byte
+	//go:embed fly-eye2.png
+	flyeye_img2 []byte
+	//go:embed fly-eye3.png
+	flyeye_img3 []byte
+)
+
+const (
+	MoverActionDefault = iota
+	MoverActionDamaged
+	MoverActionDying
+	MoverActionExploding
+	MoverActionDead
+	MoverActionMax
+)
+
+type MoverAction uint
+
+func init() {
+	img, _, err := image.Decode(bytes.NewReader(flyeye_img))
+	if err != nil {
+		log.Fatal(err)
+	}
+	flyeyeImage = ebiten.NewImageFromImage(img)
+
+	img, _, err = image.Decode(bytes.NewReader(flyeye_img2))
+	if err != nil {
+		log.Fatal(err)
+	}
+	flyeyeImage2 = ebiten.NewImageFromImage(img)
+
+	img, _, err = image.Decode(bytes.NewReader(flyeye_img3))
+	if err != nil {
+		log.Fatal(err)
+	}
+	flyeyeImage3 = ebiten.NewImageFromImage(img)
+}
+
+type Mover struct {
+	Sprite     *ebiten.Image
+	Maks       *ebiten.Image
+	MaksDest   *ebiten.Image
+	Angle      float64
+	Pos        Coordinates
+	Origin     Coordinates
+	Action     MoverAction
+	cycles     int
+	rotating   bool
+	Toggled    bool
+	Hit        bool
+	dyingcount int
+}
+
+func NewMover() *Mover {
+	m := &Mover{
+		Sprite:     ebiten.NewImage(48, 48),
+		Maks:       ebiten.NewImage(48, 48),
+		MaksDest:   ebiten.NewImage(48, 48),
+		Action:     MoverActionDefault,
+		cycles:     4,
+		Angle:      0,
+		rotating:   false,
+		Toggled:    false,
+		dyingcount: 0,
+	}
+
+	m.Maks.Fill(color.White)
+	return m
+}
+
+func (m *Mover) ToggleRotate() {
+	m.rotating = !m.rotating
+}
+
+func (m *Mover) SetAngle(a float64) {
+	m.Angle = a
+}
+
+func (m *Mover) SetOrigin(coords Coordinates) {
+	m.Origin = coords
+	m.Pos = coords
+}
+
+func (m *Mover) Draw() {
+	m.Sprite.Clear()
+	m.MaksDest.Clear()
+
+	idx := (m.cycles / 8) % 4
+
+	y0 := 0
+	y1 := 48
+	x0 := 48 * idx
+	x1 := x0 + 48
+
+	switch m.Action {
+	case MoverActionDefault:
+		m.Sprite.DrawImage(flyeyeImage.SubImage(image.Rect(x0, y0, x1, y1)).(*ebiten.Image), nil)
+	case MoverActionDamaged:
+		m.Sprite.DrawImage(flyeyeImage2.SubImage(image.Rect(x0, y0, x1, y1)).(*ebiten.Image), nil)
+	case MoverActionDying:
+		m.dyingcount++
+		if (m.cycles/5)%2 == 0 {
+
+			m.MaksDest.DrawImage(flyeyeImage2.SubImage(image.Rect(x0, y0, x1, y1)).(*ebiten.Image), nil)
+			op := &ebiten.DrawImageOptions{}
+			op.GeoM.Reset()
+			op.Blend = ebiten.BlendSourceAtop
+			m.MaksDest.DrawImage(m.Maks, op)
+			m.Sprite.DrawImage(m.MaksDest, nil)
+
+		} else {
+			m.Sprite.DrawImage(flyeyeImage2.SubImage(image.Rect(x0, y0, x1, y1)).(*ebiten.Image), nil)
+		}
+		if m.dyingcount > 60 {
+			m.cycles = 0
+			m.SetHit()
+		}
+	case MoverActionExploding:
+		m.Sprite.DrawImage(flyeyeImage3.SubImage(image.Rect(x0, y0, x1, y1)).(*ebiten.Image), nil)
+		if idx == 3 {
+			m.SetHit()
+		}
+	default:
+	}
+}
+
+func (m *Mover) Update() {
+	/*
+		dx := 0. //40 * math.Cos(float64(m.cycles)/16)
+		dy := 0. //40 * math.Sin(float64(m.cycles)/16)
+
+		m.Pos = Coordinates{X: m.Origin.X + dx, Y: m.Origin.Y + dy}
+	*/
+	/*
+		if m.rotating {
+			m.Angle = float64(m.cycles) / (math.Pi * 2)
+		}
+	*/
+	m.cycles++
+}
+
+func (m *Mover) SetHit() {
+	m.Action++ // = (m.Action + 1) % MoverActionMax
+}
+
+func (m *Mover) ToggleColor() {
+	m.Toggled = !m.Toggled
+}