Refactor to use better interfaces and event callbacks.

gameelement/background.go

@@ -0,0 +1,83 @@
+package gameelement
+
+import (
+	"image"
+	"math/rand/v2"
+	"mover/assets"
+	"mover/gamedata"
+
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+type Background struct {
+	Sprite      *ebiten.Image
+	initialized bool
+}
+
+func NewBackground(a gamedata.Area) *Background {
+	b := &Background{
+		Sprite:      ebiten.NewImage(a.Width, a.Height),
+		initialized: false,
+	}
+	return b
+}
+
+func (b *Background) SetInputs(gamedata.GameInputs) {
+
+}
+
+func (b *Background) Update() error {
+
+	if !b.initialized {
+		b.Initialize()
+	} else {
+
+	}
+
+	return nil
+}
+
+func (b *Background) Draw(drawimg *ebiten.Image) {
+	//all the stuff before
+	op := &ebiten.DrawImageOptions{}
+	drawimg.DrawImage(b.Sprite, op)
+}
+
+func (b *Background) Initialize() {
+	b.ConstructBackground()
+	b.initialized = true
+}
+
+func (b *Background) ConstructBackground() {
+	BLOCK_SIZE := 32
+
+	for i := 0; i < b.Sprite.Bounds().Dx()/BLOCK_SIZE; i++ {
+		for j := 0; j < b.Sprite.Bounds().Dy()/BLOCK_SIZE; j++ {
+
+			//select random tile in x and y from tileset
+			idx_y := rand.IntN(256 / BLOCK_SIZE)
+			idx_x := rand.IntN(256 / BLOCK_SIZE)
+
+			x0 := BLOCK_SIZE * idx_x
+			y0 := BLOCK_SIZE * idx_y
+			x1 := x0 + BLOCK_SIZE
+			y1 := y0 + BLOCK_SIZE
+
+			//translate for grid element we're painting
+			op := &ebiten.DrawImageOptions{}
+			op.GeoM.Translate(float64(i*BLOCK_SIZE), float64(j*BLOCK_SIZE))
+			b.Sprite.DrawImage(assets.ImageBank[assets.TileSet].SubImage(image.Rect(x0, y0, x1, y1)).(*ebiten.Image), op)
+		}
+	}
+
+	ax := float64(rand.IntN(b.Sprite.Bounds().Dx()/BLOCK_SIZE) * BLOCK_SIZE)
+	ay := float64(rand.IntN(b.Sprite.Bounds().Dy()/BLOCK_SIZE) * BLOCK_SIZE)
+
+	op := &ebiten.DrawImageOptions{}
+	op.GeoM.Translate(ax, ay)
+	b.Sprite.DrawImage(assets.ImageBank[assets.Altar], op)
+}
+
+func (b *Background) RegisterEvents(e gamedata.GameEvent, f func()) {
+
+}