fixed observers, added GameObserver

observers/game_observer.go

@@ -0,0 +1,31 @@
+package observers
+
+import (
+	"github.com/mlange-42/arche/ecs"
+	"github.com/mlange-42/arche/generic"
+)
+
+// Used for global game state
+type GameObserver struct {
+	CurrentLevel, Width, Height, Cellsize, Score int
+}
+
+func NewGameObserver(world *ecs.World, startlevel, width, height, cellsize int) *GameObserver {
+	observer := &GameObserver{
+		CurrentLevel: startlevel,
+		Width:        width,
+		Height:       height,
+		Cellsize:     cellsize,
+	}
+
+	resmanger := generic.NewResource[GameObserver](world)
+	resmanger.Add(observer)
+
+	return observer
+}
+
+func GetGameObserver(world *ecs.World) *GameObserver {
+	observerID := ecs.ResourceID[GameObserver](world)
+	observer := world.Resources().Get(observerID).(*GameObserver)
+	return observer
+}

observers/player_observer.go

@@ -50,3 +50,7 @@ func (observer *PlayerObserver) AddEntity(entity ecs.Entity) {
 func (observer *PlayerObserver) RemoveEntity(entity ecs.Entity) {
 	delete(observer.Entities, entity)
 }
+
+func (observer *PlayerObserver) RemoveEntities() {
+	observer.Entities = make(map[ecs.Entity]int)
+}