Initial commit.

elements/duck.go

@@ -0,0 +1,54 @@
+package elements
+
+import (
+	"ducky/gamedata"
+	"image"
+
+	"github.com/hajimehoshi/ebiten/v2"
+	"golang.org/x/exp/rand"
+)
+
+const (
+	DuckyWidth  = 36
+	DuckyHeight = DuckyWidth
+)
+
+type Ducky struct {
+	Sprite   *ebiten.Image
+	asset    *ebiten.Image
+	cycle    int
+	position gamedata.Coordinates
+}
+
+func NewDucky(asset *ebiten.Image) *Ducky {
+	d := &Ducky{
+		Sprite: ebiten.NewImage(DuckyWidth, DuckyHeight),
+		asset:  asset,
+		cycle:  rand.Intn(11),
+	}
+	return d
+}
+
+func (d *Ducky) Update() {
+	d.cycle++
+}
+
+func (d *Ducky) Draw() {
+	d.Sprite.Clear()
+
+	idx := d.cycle / 4 % 10
+	x0 := idx * DuckyWidth
+	y0 := 0
+	x1 := x0 + DuckyWidth
+	y1 := DuckyHeight
+
+	d.Sprite.DrawImage(d.asset.SubImage(image.Rect(x0, y0, x1, y1)).(*ebiten.Image), nil)
+}
+
+func (d *Ducky) SetPosition(pos gamedata.Coordinates) {
+	d.position = pos
+}
+
+func (d *Ducky) GetPosition() gamedata.Coordinates {
+	return d.position
+}