Plant spawn

scripts/level/layered_entity_container.gd

@@ -0,0 +1,37 @@
+extends Node
+
+class_name LayeredEntityContainer
+
+var entities := {
+	"under" : [],
+	"base"  : [],
+	"above" : []
+}
+
+func _ready() -> void:
+	LevelEventBus.layer_entity_created.connect(on_entity_spawned)
+	LevelEventBus.layer_entity_killed.connect(on_entity_killed)
+	
+	for layer in entities.keys():
+		entities[layer].resize(FieldParams.COLUMNS * FieldParams.ROWS)
+
+## Checks if tile is occupied. [br]
+## If position or layer are invalid, returns true
+func is_occupied(position : int, layer : StringName) -> bool:
+	if position >= FieldParams.COLUMNS * FieldParams.ROWS or entities.has(layer) == false: return true
+	return not entities[layer][position] == null
+
+func on_entity_spawned(entity : Entity) -> void:
+	if entities.has(entity.layer) == false: return
+	
+	var index = FieldParams.indexify(entity.get_parent().global_position)
+	if index >= FieldParams.COLUMNS * FieldParams.ROWS or is_occupied(index,entity.layer): return
+	
+	entities[entity.layer][index] = entity
+
+func on_entity_killed(context : Entity.KilledContext) -> void:
+	var entity = context.target
+	var index = FieldParams.indexify(entity.get_parent().global_position)
+	if is_occupied(index,entity.layer) == false: return
+	
+	entities[entity.layer][index] = null