scripts/autoloads/grid.gd

@@ -37,3 +37,6 @@ func get_location_data(pos: Vector2i) -> CellData:
 func change_location_resource(pos: Vector2i, data: GameResource) -> void:
 	world_data[pos].change_resource(data)
 	world_grid.set_cell(Constants.TilemapLayers.ENVIRONMENT, pos, 0, data.atlas_location)
+
+func change_location_building(pos: Vector2i, data: BuildingBase) -> void:
+	world_data[pos].change_building(data)

scripts/autoloads/resource_manager.gd

@@ -1,4 +1,4 @@
-
+extends Node
 signal changed_resource
 
 @export var resources := {}
@@ -10,6 +10,29 @@ func _on_gained_resource(res: GameResource) -> void:
 	}
 	changed_resource.emit(ResourceChangedSignal.new(changed_resources))
 
+func pickup(resource: GameResource) -> void:
+	if not resources.has(resource):
+		resources[resource] = 0
+	resources[resource] += resource.pickup_value
+	var changed_resources := {
+		resource: resource.pickup_value
+	}
+	changed_resource.emit(ResourceChangedSignal.new(changed_resources))
+
+func has_amount(res: GameResource, amount: int) -> bool:
+	return resources[res] >= amount if resources.has(res) else false
+	
+func has_resources(cost: Dictionary) -> bool:
+	return cost.keys().reduce(func(accum, res): return accum and has_amount(res, cost[res]), true)
+	
+func use_resources(cost: Dictionary) -> void:
+	var changed_resources := {
+	}
+	for res in cost.keys():
+		resources[res] -= cost[res]
+		changed_resources[res] = -cost[res]
+	changed_resource.emit(ResourceChangedSignal.new(changed_resources))
+
 #func _on_timer_timeout() -> void:
 	#var corrupted_resources := Grid.get_corrupted_resources()
 	#if corrupted_resources.size() > 0:

scripts/build_menu.gd

@@ -20,7 +20,7 @@ const BASIC_BUILDING_GROUP = preload("res://data/buildings/basic/basic_building_
 func _ready() -> void:
 	_add_building_group(BASIC_BUILDING_GROUP)
 	_add_building_group(ADVANCED_BUILDING_GROUP)
-	building_groups.set_focus()
+	#building_groups.set_focus()
 
 func _add_building_group(group: BuildingGroup) -> void:
 	building_groups.add_item(group.name, group.atlas_texture)
@@ -55,6 +55,8 @@ func _on_buildings_item_selected(index: int) -> void:
 		build_materials.add_child(image)
 		var label = Label.new()
 		label.text = str(selected_building.cost[res])
+		if not ResourceManager.has_amount(res, selected_building.cost[res]):
+			label.add_theme_color_override("font_color", Color.RED)
 		build_materials.add_child(label)
 	
 	description.show()

scripts/cell_data.gd

@@ -25,6 +25,9 @@ func change_layer(layer: int, data: Variant) -> bool:
 func change_resource(data: GameResource) -> void:
 	layer_info[Constants.TilemapLayers.ENVIRONMENT] = data
 	
+func change_building(data: BuildingBase) -> void:
+	layer_info[Constants.TilemapLayers.BUILDINGS] = data
+	
 func get_resource() -> GameResource:
 	return layer_info[Constants.TilemapLayers.ENVIRONMENT] as GameResource
 
@@ -44,7 +47,7 @@ func is_interactable() -> bool:
 	return has_resource() or has_building()
 
 func is_buildable() -> bool:
-	return not has_resource() or not has_building()
+	return not has_resource() and not has_building()
 
 func get_interaction_options() -> Array[Interaction]:
 	var interactions: Array[Interaction] = []

scripts/gui.gd

@@ -6,6 +6,9 @@ const SCIFI_TILESHEET = preload("res://assets/scifi_tilesheet@2.png")
 
 var _resource_displays := {}
 
+func _ready() -> void:
+	ResourceManager.changed_resource.connect(_on_resource_manager_changed_resource)
+
 func _on_resource_manager_changed_resource(changed: ResourceChangedSignal) -> void:
 	for resource: GameResource in changed.changed_resources.keys():
 		if not _resource_displays.has(resource):

scripts/interaction_bar.gd

@@ -15,5 +15,5 @@ func _ready() -> void:
 func _cleanup_gather() -> void:
 	interaction_finished.emit()
 	var res: GameResource = Grid.get_location_data(grid_position).get_resource()
-	res.gained_resource.emit(res)
+	ResourceManager.pickup(res)
 	self.queue_free()

scripts/player.gd

@@ -35,13 +35,12 @@ func _physics_process(delta: float) -> void:
 	
 	if _build_placement:
 		_build_placement.position = Grid.grid_to_world_center(interaction_location)
+		_build_placement.self_modulate = Color(0, 1, 0, 0.5) if Grid.get_location_data(interaction_location).is_buildable() else Color(1, 0, 0, 0.4)
 
 func _input(event: InputEvent) -> void:
 	if event.is_action_pressed("interact"):
 		if _attempting_build and Grid.get_location_data(interaction_location).is_buildable():
-			var build: BuildingBase = BUILDING_BASE.instantiate()
-			build.initialize(_attempting_build, interaction_location)
-			add_sibling(build)
+			_build()
 		elif  not _interacting and Grid.get_location_data(interaction_location).is_interactable():
 			var interaction = INTERACTION_BAR.instantiate()
 			interaction.interaction_finished.connect(_on_interaction_finished)
@@ -64,6 +63,18 @@ func _on_build_menu_build(building: Building) -> void:
 	_build_placement.self_modulate = Color(1, 0, 0, 0.4)
 	add_sibling(_build_placement)
 
+func _build() -> void:
+	ResourceManager.use_resources(_attempting_build.cost)
+	var build: BuildingBase = BUILDING_BASE.instantiate()
+	build.initialize(_attempting_build, interaction_location)
+	add_sibling(build)
+	Grid.change_location_building(interaction_location, build)
+	
+	if not ResourceManager.has_resources(_attempting_build.cost):
+		_attempting_build = null
+		_build_placement.queue_free()
+		_build_placement = null
+
 func _on_interation_options_closed() -> void:
 	_interaction_options = null
 

scripts/world.gd

@@ -14,7 +14,6 @@ var noise_regions := [-999,0,999]
 var atlas_regions := [Vector2i(0,1),Vector2i(0,0)]
 
 @onready var world_grid: TileMap = $world_grid
-@onready var resource_manager: Node2D = $ResourceManager
 
 func get_noise_value(x: int, y: int):
 	return terrain_noise.get_noise_2d(x,y) * 500
@@ -62,7 +61,7 @@ func corrupt_location(loc: Vector2i):
 
 func add_resources_to_map() -> void:
 	for res: GameResource in game_resources:
-		res.gained_resource.connect(resource_manager._on_gained_resource)
+		#res.gained_resource.connect(ResourceManager._on_gained_resource)
 		var spawns = res.get_spawn_locations()
 		for spawn in spawns:
 			Grid.change_location_resource(spawn, res)