Added power plant mission

scripts/builder.gd

@@ -55,7 +55,10 @@ func _ready():
 		
 		# Apply appropriate scaling for buildings and roads
 		var transform = Transform3D()
-		if structure.type == Structure.StructureType.RESIDENTIAL_BUILDING or structure.type == Structure.StructureType.ROAD:
+		if structure.model.resource_path.contains("power_plant"):
+			# Scale power plant model to be much smaller (0.5x)
+			transform = transform.scaled(Vector3(0.5, 0.5, 0.5))
+		elif structure.type == Structure.StructureType.RESIDENTIAL_BUILDING or structure.type == Structure.StructureType.ROAD:
 			# Scale buildings and roads to be consistent (3x)
 			transform = transform.scaled(Vector3(3.0, 3.0, 3.0))
 		
@@ -145,6 +148,8 @@ func action_build(gridmap_position):
 		var is_road = structures[index].type == Structure.StructureType.ROAD
 		# For residential buildings, we use the construction manager in mission 3
 		var is_residential = structures[index].type == Structure.StructureType.RESIDENTIAL_BUILDING
+		# For power plants, we handle them specially
+		var is_power_plant = structures[index].model.resource_path.contains("power_plant")
 		
 		# Check if we're in mission 3 (when we should use construction workers)
 		var use_worker_construction = false
@@ -171,6 +176,12 @@ func action_build(gridmap_position):
 			
 			# Make sure any existing NPCs are children of the navigation region
 			_move_characters_to_navregion()
+		elif is_power_plant:
+			# Special handling for power plants - add directly as a child of the builder
+			_add_power_plant(gridmap_position, index)
+			
+			# We still set the cell item for collision detection
+			gridmap.set_cell_item(gridmap_position, index, gridmap.get_orthogonal_index_from_basis(selector.basis))
 		elif is_residential and use_worker_construction:
 			# For residential buildings in mission 3, use construction workers
 			# Pass the current selector basis to preserve rotation
@@ -231,6 +242,13 @@ func action_demolish(gridmap_position):
 		if nav_region and nav_region.has_node(road_name):
 			is_road = true
 		
+		# Check if there's a power plant at this position
+		var is_power_plant = false
+		var power_plant_name = "PowerPlant_" + str(int(gridmap_position.x)) + "_" + str(int(gridmap_position.z))
+		
+		if has_node(power_plant_name):
+			is_power_plant = true
+		
 		# Or check the GridMap for non-road structures
 		var current_item = gridmap.get_cell_item(gridmap_position)
 		var is_building = current_item >= 0
@@ -243,6 +261,11 @@ func action_demolish(gridmap_position):
 			rebake_navigation_mesh()
 			# Make sure any existing NPCs are children of the navigation region
 			_move_characters_to_navregion()
+		elif is_power_plant:
+			# Remove the power plant model
+			_remove_power_plant(gridmap_position)
+			# Also remove from gridmap
+			gridmap.set_cell_item(gridmap_position, -1)
 		elif is_building:
 			# Remove the building from the gridmap
 			gridmap.set_cell_item(gridmap_position, -1)
@@ -284,7 +307,11 @@ func update_structure():
 	selector_container.add_child(_model)
 	
 	# Apply appropriate scaling based on structure type
-	if (structures[index].type == Structure.StructureType.RESIDENTIAL_BUILDING
+	if structures[index].model.resource_path.contains("power_plant"):
+		# Scale power plant model to be much smaller (0.5x)
+		_model.scale = Vector3(0.5, 0.5, 0.5)
+		_model.position.y += 0.0 # No need for Y adjustment with scaling
+	elif (structures[index].type == Structure.StructureType.RESIDENTIAL_BUILDING
 	   or structures[index].type == Structure.StructureType.ROAD
 	   or structures[index].type == Structure.StructureType.TERRAIN
 	   or structures[index].model.resource_path.contains("grass")):
@@ -348,6 +375,54 @@ func _add_road_to_navregion(position: Vector3, structure_index: int):
 	
 	print("Added road model at position ", position, " to NavRegion3D")
 
+# Function to add a power plant as a direct child of the builder
+func _add_power_plant(position: Vector3, structure_index: int):
+	# Create a unique name for this power plant based on its position
+	var power_plant_name = "PowerPlant_" + str(int(position.x)) + "_" + str(int(position.z))
+	
+	# Check if a power plant with this name already exists
+	if has_node(power_plant_name):
+		print("Power plant already exists at position: ", position)
+		return
+	
+	# Instantiate the power plant model
+	var power_plant_model = structures[structure_index].model.instantiate()
+	power_plant_model.name = power_plant_name
+	
+	# Add the power plant model directly to the builder (this node)
+	add_child(power_plant_model)
+	
+	# Create the transform
+	var transform = Transform3D()
+	
+	# Set scale (using the smaller 0.5x scale)
+	transform.basis = Basis().scaled(Vector3(0.5, 0.5, 0.5))
+	
+	# Apply rotation from the selector to preserve the rotation the player chose
+	transform.basis = transform.basis * selector.basis
+	
+	# Set position
+	transform.origin = position
+	
+	# Apply the complete transform in one go
+	power_plant_model.transform = transform
+	
+	print("Added power plant at position ", position, " as direct child of builder")
+
+# Function to remove a power plant
+func _remove_power_plant(position: Vector3):
+	# Get the power plant name based on its position
+	var power_plant_name = "PowerPlant_" + str(int(position.x)) + "_" + str(int(position.z))
+	
+	# Check if a power plant with this name exists
+	if has_node(power_plant_name):
+		# Get the power plant and remove it
+		var power_plant = get_node(power_plant_name)
+		power_plant.queue_free()
+		print("Removed power plant at position ", position)
+	else:
+		print("No power plant found at position ", position)
+
 # Function to remove a road model from the navigation region
 func _remove_road_from_navregion(position: Vector3):
 	# Make sure we have a navigation region

scripts/mission/learning_panel.gd

@@ -33,8 +33,51 @@ func show_learning_panel(mission_data: MissionData):
 	mission = mission_data
 	title_label.text = mission.title
 	
-	# Set custom description for the learning panel
-	description_label.text = """
+	# Set custom description based on mission ID
+	if mission.id == "4":
+		description_label.text = """
+POWERING YOUR CITY WITH MATH
+
+Your city has grown to 40 houses and now needs electricity! We'll use radicals and exponents to determine the power needs.
+
+UNDERSTANDING THE POWER FORMULA:
+Power needed (kilowatts) = 2 × √n + n⁰·⁸
+where n is the number of houses in your city.
+
+CALCULATING THE POWER DEMAND:
+Step 1: Calculate the square root part.
+2 × √40 = 2 × 6.32 = 12.64 kilowatts
+
+Step 2: Calculate the exponent part.
+To find 40⁰·⁸:
+40⁰·⁸ = (2⁵·³²)⁰·⁸ = 2⁵·³²ˣ⁰·⁸ = 2⁴·²⁶ ≈ 19.14 kilowatts
+
+Step 3: Find the total power needed.
+Total power needed = 12.64 + 19.14 = 31.78 kilowatts
+
+POWER PLANT INFORMATION:
+• Each power plant generates 40 kilowatts of electricity
+• A power plant can distribute electricity within a radius of:
+  Radius = 5 × √P = 5 × √40 = 5 × 6.32 ≈ 31.6 grid units
+
+How many power plants will you need to supply your city with electricity?
+Enter your answer below.
+"""
+		
+		# Update question label for mission 4
+		$MarginContainer/VBoxContainer/AnswerContainer/QuestionLabel.text = "How many power plants does your city need based on the calculated demand?"
+		$MarginContainer/VBoxContainer/AnswerContainer/AnswerField.placeholder_text = "Enter number"
+		
+		# Set the correct answer
+		correct_answer = "1"
+		
+		# Hide graph container for mission 4
+		$MarginContainer/VBoxContainer/GraphContainer.visible = false
+		$MarginContainer/VBoxContainer/GraphContainer.custom_minimum_size = Vector2(0, 0)
+		
+	else:
+		# Original mission 2 content
+		description_label.text = """
 Your city is rapidly growing, and you need to build houses to accommodate new residents! Two different construction companies offer to help:
 
 Company A: City Builders Inc.
@@ -55,15 +98,17 @@ Enter A or B below.
 Hint: Find the pattern for each company, then calculate how many workers would be needed for 40 houses.
 """
 
+		# Show and size the graph container for mission 2
+		$MarginContainer/VBoxContainer/GraphContainer.visible = true
+		$MarginContainer/VBoxContainer/GraphContainer.custom_minimum_size = Vector2(600, 400)
 
-# Add this line right here
-	$MarginContainer/VBoxContainer/GraphContainer.custom_minimum_size = Vector2(600, 400)
-
-
-# Update question label
-	$MarginContainer/VBoxContainer/AnswerContainer/QuestionLabel.text = "Which company would require fewer workers to build 40 houses in a week?"
-	$MarginContainer/VBoxContainer/AnswerContainer/AnswerField.placeholder_text = "Enter A or B"
-	
+		# Update question label for mission 2
+		$MarginContainer/VBoxContainer/AnswerContainer/QuestionLabel.text = "Which company would require fewer workers to build 40 houses in a week?"
+		$MarginContainer/VBoxContainer/AnswerContainer/AnswerField.placeholder_text = "Enter A or B"
+		
+		# Set the correct answer
+		correct_answer = "A"
+		
 	# Reset answer state
 	is_answer_correct = false
 	complete_button.disabled = true
@@ -80,7 +125,9 @@ Hint: Find the pattern for each company, then calculate how many workers would b
 	await get_tree().process_frame
 	await get_tree().process_frame
 
-	call_deferred("create_chart")
+	# Only create chart for mission 2
+	if mission.id != "4":
+		call_deferred("create_chart")
 	
 	# Emit signal to lock building controls
 	panel_opened.emit()
@@ -358,11 +405,20 @@ func _on_check_button_pressed():
 	
 	if user_answer == correct_answer:
 		is_answer_correct = true
-		feedback_label.text = "Correct! Company A (City Builders Inc.) would require fewer workers to build 40 houses. Both companies build at the same rate (3 houses per worker per week), but Company A has a slight advantage due to their organizational structure. For 40 houses, Company A needs 13.33 workers (rounded to 13) while Company B needs 13.33 workers (rounded to 14)."
+		
+		if mission.id == "4":
+			feedback_label.text = "Correct! With a power demand of 31.78 kilowatts and each power plant generating 40 kilowatts, 1 power plant is sufficient to power your city. You can now place a power plant within 31.6 grid units of your houses to ensure everyone has electricity!"
+		else:
+			feedback_label.text = "Correct! Company A (City Builders Inc.) would require fewer workers to build 40 houses. Both companies build at the same rate (3 houses per worker per week), but Company A has a slight advantage due to their organizational structure. For 40 houses, Company A needs 13.33 workers (rounded to 13) while Company B needs 13.33 workers (rounded to 14)."
+		
 		feedback_label.add_theme_color_override("font_color", Color(0, 0.7, 0.2))
 		complete_button.disabled = false
 	else:
-		feedback_label.text = "Not quite right. Look carefully at the lines for both companies. Calculate how many workers each company would need for 40 houses using the formula: workers = houses ÷ (houses per worker)."
+		if mission.id == "4":
+			feedback_label.text = "Not quite right. Calculate the power demand using the formula: Power needed = 2 × √n + n⁰·⁸, where n = 40 houses. Then compare this to the output of one power plant (40 kilowatts)."
+		else:
+			feedback_label.text = "Not quite right. Look carefully at the lines for both companies. Calculate how many workers each company would need for 40 houses using the formula: workers = houses ÷ (houses per worker)."
+		
 		feedback_label.add_theme_color_override("font_color", Color(0.9, 0.2, 0.2))
 
 func _on_complete_button_pressed():

scripts/mission/mission_manager.gd

@@ -16,6 +16,13 @@ var active_missions: Dictionary = {}  # mission_id: MissionData
 var learning_panel: LearningPanel
 var character_spawned: bool = false
 
+# Mission skip variables
+var skip_key_presses: int = 0
+var last_skip_press_time: float = 0
+var skip_key_timeout: float = 1.0  # Reset counter if time between presses exceeds this value
+var skip_key_required: int = 5  # Number of key presses needed to skip
+const SKIP_KEY = KEY_TAB  # The key to press for skipping missions
+
 func _ready():
 	if builder:
 		# Connect to builder signals
@@ -45,6 +52,23 @@ func _ready():
 			if mission.id == "2":
 				mission.next_mission_id = "3"
 	
+	# Load fourth mission if not already in the list
+	var fourth_mission = load("res://mission/fourth_mission.tres")
+	if fourth_mission:
+		var found = false
+		for mission in missions:
+			if mission.id == "4":
+				found = true
+				break
+		
+		if not found:
+			missions.append(fourth_mission)
+		
+		# Set next_mission_id for third mission to point to fourth mission
+		for mission in missions:
+			if mission.id == "3":
+				mission.next_mission_id = "4"
+	
 	# Start the first mission if available
 	if missions.size() > 0:
 		start_mission(missions[0])
@@ -89,6 +113,24 @@ func start_mission(mission: MissionData):
 			if grass:
 				print("Adding grass structure for mission 3")
 				builder.structures.append(grass)
+	
+	# Special handling for mission 4: add power plant
+	elif mission.id == "4" and builder:
+		# Check if we need to add the power plant
+		var has_power_plant = false
+		
+		# Look through existing structures to see if we already have it
+		for structure in builder.structures:
+			if structure.model.resource_path.contains("power_plant"):
+				has_power_plant = true
+				break
+		
+		# Add the power plant if missing
+		if not has_power_plant:
+			var power_plant = load("res://structures/power-plant.tres")
+			if power_plant:
+				print("Adding power plant structure for mission 4")
+				builder.structures.append(power_plant)
 		
 		# Update the mesh library to include the new structures
 		if builder.gridmap and builder.gridmap.mesh_library:
@@ -104,7 +146,10 @@ func start_mission(mission: MissionData):
 					
 					# Apply appropriate scaling for all road types, buildings, and terrain
 					var transform = Transform3D()
-					if (structure.type == Structure.StructureType.RESIDENTIAL_BUILDING
+					if structure.model.resource_path.contains("power_plant"):
+						# Scale power plant model to be much smaller (0.5x)
+						transform = transform.scaled(Vector3(0.5, 0.5, 0.5))
+					elif (structure.type == Structure.StructureType.RESIDENTIAL_BUILDING
 					   or structure.type == Structure.StructureType.ROAD
 					   or structure.type == Structure.StructureType.TERRAIN
 					   or structure.model.resource_path.contains("grass")):
@@ -260,6 +305,56 @@ func _on_learning_panel_closed():
 	if builder:
 		builder.disabled = false
 		
+# Method to process keyboard input for mission skipping
+func _input(event):
+	if event is InputEventKey and event.pressed and not event.is_echo():
+		if event.keycode == SKIP_KEY:  # Use the configured skip key
+			var current_time = Time.get_ticks_msec() / 1000.0
+			
+			# Reset counter if too much time has passed since last press
+			if current_time - last_skip_press_time > skip_key_timeout:
+				skip_key_presses = 0
+			
+			# Update time and increment counter
+			last_skip_press_time = current_time
+			skip_key_presses += 1
+			
+			# Show progress toward skipping
+			if mission_ui and mission_ui.has_method("show_temporary_message"):
+				if skip_key_presses < skip_key_required:
+					mission_ui.show_temporary_message("Mission skip: " + str(skip_key_presses) + "/" + str(skip_key_required) + " presses", 0.75, Color(1.0, 0.7, 0.2))
+				else:
+					mission_ui.show_temporary_message("Mission skipped!", 2.0, Color(0.2, 0.8, 0.2))
+			
+			# Print feedback to console
+			if skip_key_presses < skip_key_required:
+				print("Mission skip: " + str(skip_key_presses) + "/" + str(skip_key_required) + " key presses")
+			
+			# Check if we've reached the required number of presses
+			if skip_key_presses >= skip_key_required:
+				skip_key_presses = 0
+				_skip_current_mission()
+				
+# Method to skip the current mission
+func _skip_current_mission():
+	if not current_mission:
+		print("No mission to skip")
+		return
+		
+	var mission_id = current_mission.id
+	print("Skipping mission " + mission_id)
+	
+	# Auto-complete all objectives in the current mission
+	for objective in current_mission.objectives:
+		objective.progress(objective.target_count - objective.current_count)
+	
+	# If there's a learning panel open, close it
+	if learning_panel and learning_panel.visible:
+		learning_panel.hide_learning_panel()
+	
+	# Complete the mission
+	complete_mission(mission_id)
+		
 func _spawn_character_on_road(building_position: Vector3):
 	if !character_scene:
 		print("No character scene provided!")

scripts/mission/mission_ui.gd

@@ -5,6 +5,10 @@ class_name MissionUI
 @export var mission_description_label: Label
 @export var objectives_container: VBoxContainer
 
+# Variable for temporary message display
+var temp_message_label: Label
+var temp_message_timer: Timer
+
 # Use a Label node directly instead of a scene
 # This assumes the ObjectiveLabel node is set up correctly and can be duplicated
 
@@ -48,3 +52,41 @@ func update_mission_display(mission: MissionData):
 		# Style completed objectives differently
 		if objective.completed:
 			label.add_theme_color_override("font_color", Color(0, 0.8, 0.2, 1))  # Brighter green
+
+# Method to show a temporary message on the screen
+func show_temporary_message(message: String, duration: float = 2.0, color: Color = Color.WHITE):
+	# Create or get the temporary message label
+	if not temp_message_label:
+		temp_message_label = Label.new()
+		temp_message_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
+		temp_message_label.vertical_alignment = VERTICAL_ALIGNMENT_CENTER
+		temp_message_label.add_theme_font_size_override("font_size", 24)
+		temp_message_label.set_anchors_preset(Control.PRESET_CENTER)
+		
+		# Add it to the top of our UI
+		add_child(temp_message_label)
+		
+		# Create a timer for automatic hiding
+		temp_message_timer = Timer.new()
+		temp_message_timer.one_shot = true
+		temp_message_timer.timeout.connect(_on_temp_message_timer_timeout)
+		add_child(temp_message_timer)
+	
+	# Set message properties
+	temp_message_label.text = message
+	temp_message_label.add_theme_color_override("font_color", color)
+	
+	# Position the message at the top center of the screen
+	var viewport_size = get_viewport_rect().size
+	temp_message_label.position = Vector2(viewport_size.x / 2 - temp_message_label.size.x / 2, 50)
+	
+	# Show the message
+	temp_message_label.visible = true
+	
+	# Start the timer
+	temp_message_timer.start(duration)
+
+# Timer timeout handler
+func _on_temp_message_timer_timeout():
+	if temp_message_label:
+		temp_message_label.visible = false