Add enemy respawns

TODO.md

@@ -1,22 +1,18 @@
-1. Enemy respawns
-  * every now and again, the opponents has new units that spawn
-     * indicator to show respawn is nearing
-  * is it all the missing units, or a chance for each?
-2. Power ups
+1. Power ups
   * a chance of having power ups spawn on an random unoccupied square when a unit dies
     * +health, +attack, +speed, +jump, (pawn only) remove "attack_only", spawn a new (random?) piece, change movement type
   * then the enemy respawns units, their new units are stronger
   * support for pieces with multiple hit points
   * unit info panel
-3. Visual polish
+2. Visual polish
   * clean up tile borders
   * multiple square tiles to add variation
   * make the help text indicate (flash, etc.)
-4. Sound effects
+3. Sound effects
   * on hit
   * on piece lost
   * on piece kill
   * on opponent victory
   * if possible, a small bit of background music
-5. Further visual polish
-6. New units
+4. Further visual polish
+5. New units

src/Game.gd

@@ -32,6 +32,9 @@ var flash_help = null
 var rng = null
 var ai_target = null
 var ai_piece = null
+var reinforcements = null
+var reinforcements_size = 0
+var reinforcements_coords = []
 
 const piece_types = {
 	"pawn": "res://src/pieces/Pawn.tscn",
@@ -165,7 +168,7 @@ func _on_piece_click(piece, event):
 	if piece == null:
 		self.selected_piece = null
 		return
-	print("Selected piece: ", piece)
+	#print("Selected piece: ", piece)
 	if piece.is_in_group("player"):
 		piece.get_node("Body").set_modulate(Color(0, 1, 0, 1))
 	else:
@@ -278,7 +281,8 @@ func reset_game_state():
 			self.board_squares[Vector2(x, y)] = {
 				"x": x,
 				"y": y,
-				"piece": null
+				"piece": null,
+				"reinforcement": null,
 			}
 			y += 1
 		x += 1
@@ -321,13 +325,97 @@ func _on_phase_end():
 	self.current_state += 1;
 	if not self.current_state in self.states.keys():
 		self.current_state = 0
-		self.turn += 1
 		self._on_new_turn()
 	get_node("TopBar/Bottom/Instruction").set_text(
 		self.states[self.current_state]["description"] + " - " + self.states[self.current_state]["directive"]
 		)
 
+func choose_reinforcements(size, opponent: bool = true, at_spawn = true):
+	var min_square = 0
+	var max_square = (self.height * self.width) - 1
+	if at_spawn:
+		max_square = (self.width)*2 - 1
+	var range_size = max_square - min_square
+	var arrival_coords = []
+	var n = 0
+	while n < size:
+		var try = 0
+		var square_index = 0
+		var square = null
+		while try < 10:
+			# Try to get an unoccupied square
+			square_index = self.rng.randi() % range_size
+			var square_coord = Vector2(
+				floor(square_index % self.width), floor(square_index / self.width)
+			)
+			if at_spawn and not opponent:
+				square_coord.y += self.height - 2
+			square = self.board_squares[square_coord]
+			if square['piece'] == null and square['reinforcement'] == null:
+				# unoccupied, we'll take it
+				arrival_coords.append(square_coord)
+				var types = self.piece_types.keys()
+				square['reinforcement'] = types[self.rng.randi()%types.size()]
+				break
+			# occupied, try again
+			square = null
+			try += 1
+		if square == null:
+			print("Failed to find a spot to spawn reinforcement")
+		n += 1
+	return arrival_coords
+
 func _on_new_turn():
+	self.turn += 1
+	var just_spawned = false
+	if self.reinforcements != null:
+		var pf = get_node("/root/Game/MarginContainer/Playfield")
+		self.reinforcements -= 1
+		if self.reinforcements == 1:
+			# decide on what will arrive
+			self.reinforcements_coords = choose_reinforcements(self.reinforcements_size)
+			# show the player where they will arrive
+			for coord in self.reinforcements_coords:
+				pf.squares[coord].get_ref().set_reinforcement(self.board_squares[coord]['reinforcement'])
+				print("Reinforcement at coord ", coord, ": ", self.board_squares[coord]['reinforcement'])
+			get_node("BottomBar/Help").set_text("Reinforcement arrival locations analyzed")
+			self.flash_help = 3
+		elif self.reinforcements == 0:
+			# spawn them
+			for coord in self.reinforcements_coords:
+				pf.squares[coord].get_ref().set_reinforcement(null)
+				var square = self.board_squares[coord]
+				if square['piece'] == null:
+					new_piece(square['reinforcement'], "opponent", coord)
+				else:
+					print("Reinforcement arrival at ", coord, " blocked by piece!")
+					get_node("BottomBar/Help").set_text("Reinforcement at " + str(coord) + " telefragged.")
+					self.flash_help = 2
+				square['reinforcement'] = null
+			just_spawned = true
+			self.reinforcements =  null
+			self.reinforcements_size = 0
+			self.reinforcements_coords = []
+	
+	# Check for reinforcements
+	var opponent_pieces = get_tree().get_nodes_in_group("opponent")
+	# @TODO hardcoded value for number of pieces a side should have on the board
+	# If they are less than 1/4 strength ensure that reinforcements are queued
+	if opponent_pieces.size() <= 3 and self.reinforcements == null:
+		self.reinforcements = 2 # 2 turns away
+		self.reinforcements_size = 4
+		get_node("BottomBar/Help").set_text("Multiple opponent reinforcements detected inbound")
+		self.flash_help = 3
+	if self.reinforcements == null and not just_spawned:
+		var chance = lerp(0, 50, 1 - float(opponent_pieces.size())/16.0)
+		var i = self.rng.randi() % 100
+		print("Roll for reinforcements ", i, " < ", chance)
+		if i < chance:
+			self.reinforcements = 2
+			self.reinforcements_size = 1
+			get_node("BottomBar/Help").set_text("Inbound opponent reinforcements detected")
+			self.flash_help = 3
+	
 	get_node("TopBar/Top/HBoxContainer/Turn").set_text(str(self.turn))
 
 func _reset_help():
@@ -341,7 +429,8 @@ func _process(delta):
 		else:
 			self._reset_help()
 			self.flash_help = null
-	if get_tree().get_nodes_in_group("opponent").empty() or get_tree().get_nodes_in_group("player").empty():
+	var opponent_pieces = get_tree().get_nodes_in_group("opponent")
+	if opponent_pieces.empty() or get_tree().get_nodes_in_group("player").empty():
 		# The game is over
 		self.current_state = 99
 		var player_victory = false

src/Piece.gd

@@ -40,7 +40,7 @@ func _input(event):
 					get_tree().set_input_as_handled()
 			else:
 				if self.last_click != null and self.last_click <= CLICK_THRESHOLD:
-					print("Click: ", self, event)
+					#print("Click: ", self, event)
 					emit_signal("click", self, event)
 					# Work-around bug where only the last signal is connected
 					# to the Game
@@ -52,7 +52,7 @@ func _input(event):
 					get_tree().set_input_as_handled()
 		if not event.pressed and self.hold_started:
 			emit_signal("hold_stop", self, event)
-			print("Hold stop", self, " ", event)
+			#print("Hold stop", self, " ", event)
 			self.cancel_hold()
 			get_tree().set_input_as_handled()
 		
@@ -62,7 +62,7 @@ func _process(delta):
 		self.last_click += delta
 		if not self.hold_started and self.last_click >= self.CLICK_THRESHOLD:
 			self.hold_started = true;
-			print("Hold start", self, " ", null)
+			#print("Hold start", self, " ", null)
 			emit_signal("hold_start", self, null)
 	if self.hold_started:
 		self.set_global_position(get_viewport().get_mouse_position())

src/Playfield.gd

@@ -29,6 +29,7 @@ func initialize(width: int = 8, height: int = 8):
 			# @TODO any tweaks to the node by calling custom function initialize()
 			instance.translate(Vector2(128*i, 128*j))
 			self.squares[Vector2(i, j)] = weakref(instance)
+			instance.get_node("Control").set_tooltip(str(Vector2(i, j)))
 			add_child(instance)
 			j += 1
 		i += 1

src/Square.gd

@@ -5,11 +5,41 @@ class_name Square
 # var a = 2
 # var b = "text"
 
-
+var reinforcement = null
+var timer = 0
+const FLASH_FREQUENCY = 2 # seconds
+const FLASH_MIN = Color(1, 0.75, 0.75, 1)
+const FLASH_MAX = Color(1, 0.5, 0.5, 1)
+const DEFAULT_BODY = Color(1, 1, 1, 1)
 # Called when the node enters the scene tree for the first time.
 func _ready():
 	pass # Replace with function body.
 
+func set_reinforcement(reinforcement):
+	self.reinforcement = reinforcement
+	self.timer = 0
+	print("Set reinforcement on ", self, " : ", reinforcement)
+	if reinforcement == null:
+		get_node("Body").set_modulate(DEFAULT_BODY)
+		get_node("Control").set_tooltip("")
+	else:
+		get_node("Control").set_tooltip("Arriving unit: " + reinforcement)
+
+func _process(delta):
+	if self.reinforcement != null:
+		self.timer += delta
+		if self.timer >= FLASH_FREQUENCY*2:
+			self.timer = 0
+		if self.timer >= FLASH_FREQUENCY:
+			# Going from dark to light
+			get_node("Body").set_modulate(
+				lerp(FLASH_MIN, FLASH_MAX, 1-((self.timer-FLASH_FREQUENCY)/FLASH_FREQUENCY))
+			)
+		else:
+			# Going from light to dark
+			get_node("Body").set_modulate(
+				lerp(FLASH_MIN, FLASH_MAX, self.timer / FLASH_FREQUENCY)
+			)
 
 # Called every frame. 'delta' is the elapsed time since the previous frame.
 #func _process(delta):

src/Square.tscn

@@ -19,6 +19,16 @@ modulate = Color( 0.12549, 0.0980392, 0.0980392, 1 )
 texture = ExtResource( 1 )
 
 [node name="Area2D" type="Area2D" parent="."]
+visible = false
 
 [node name="CollisionShape2D" type="CollisionShape2D" parent="Area2D"]
+visible = false
 shape = SubResource( 1 )
+
+[node name="Control" type="Control" parent="."]
+margin_right = 40.0
+margin_bottom = 40.0
+hint_tooltip = "Square"
+__meta__ = {
+"_edit_use_anchors_": false
+}