From 2d2a9fe8520f469897f49dc261289d7cc1c5d26c Mon Sep 17 00:00:00 2001
From: Martin Kagamino Lehoux <martin@lehoux.net>
Date: Fri, 15 Sep 2023 08:10:04 +0200
Subject: refactor: Into ECS

---
 entity.go | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 entity.go

(limited to 'entity.go')

diff --git a/entity.go b/entity.go
new file mode 100644
index 0000000..6066772
--- /dev/null
+++ b/entity.go
@@ -0,0 +1,39 @@
+package main
+
+import "github.com/hajimehoshi/ebiten/v2"
+
+type Component[T any] struct {
+	IsEnabled bool
+	Value     T
+}
+
+func C[T any](t T) Component[T] {
+	return Component[T]{IsEnabled: true, Value: t}
+}
+
+type Entity struct {
+	Position  Component[Point]
+	Image     Component[*ebiten.Image]
+	Selection Component[Selection]
+	Move      Component[Move]
+}
+
+func (e Entity) Bounds() Rectangle {
+	return Rectangle{
+		e.Position.Value,
+		e.Position.Value.Add(e.Image.Value.Bounds().Size()),
+	}
+}
+
+func Draw(screen *ebiten.Image, e *Entity) {
+	if e.Image.IsEnabled && e.Position.IsEnabled {
+		op := &ebiten.DrawImageOptions{}
+		op.GeoM.Translate(float64(e.Position.Value.X), float64(e.Position.Value.Y))
+		if e.Selection.IsEnabled && e.Selection.Value.IsSelected {
+			op.GeoM.Translate(-10, -10)
+			screen.DrawImage(e.Selection.Value.SelectedImage, op)
+		} else {
+			screen.DrawImage(e.Image.Value, op)
+		}
+	}
+}
-- 
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