Some line removal logic

GameBoard.gd

@@ -1,23 +1,62 @@
 extends Node2D
 
 
-onready var active_shape: Node2D = $ShapeSquare
+onready var active_shape: TetrisShape = $ShapeSquare
 
 const RASTER_SIZE = 64
+const BOTTOM = RASTER_SIZE * 10
 
 
 func _ready():
 	$GravityTimer.connect("timeout", self, "update_board")
 
 
+func get_random_shape():
+	# TODO: Make random
+	var new_shape = preload("res://ShapeSquare.tscn").instance()
+	add_child(new_shape)
+	return new_shape
+
+
 func update_board():
-	if active_shape.position.y == RASTER_SIZE * 9:
-		# TODO: Turn into static blocks
-		return
+	if active_shape.position.y == RASTER_SIZE * 10:
+		turn_active_into_static()
+		check_for_full_line()
+		
+		active_shape = get_random_shape()
 	
 	active_shape.position.y += RASTER_SIZE
 
 
+func turn_active_into_static():
+	for block in active_shape.get_blocks():
+		var global_shape_position = block.global_position
+		active_shape.remove_child(block)
+		$StaticBlocks.add_child(block)
+		block.global_position = global_shape_position
+	
+	active_shape.free()
+
+
+func check_for_full_line():
+	var line_counts = {} # Maps a y position to a count
+	
+	for block in $StaticBlocks.get_children():
+		if not line_counts.has(block.position.y):
+			line_counts[block.position.y] = 0
+		line_counts[block.position.y] += 1
+	
+	for line_count_y in line_counts.keys():
+		if line_counts[line_count_y] == 10:
+			# Free this line
+			for line_block in $StaticBlocks.get_children():
+				if line_block.position.y == line_count_y:
+					line_block.free()
+				elif line_block.position.y > line_count_y:
+					# Move higher-up blocks down
+					line_block.position.y += RASTER_SIZE
+
+
 func move_left():
 	# TODO: Check for collision
 	active_shape.position.x -= RASTER_SIZE
@@ -28,6 +67,13 @@ func move_right():
 	active_shape.position.x += RASTER_SIZE
 
 
+func drop():
+	active_shape.position.y = BOTTOM
+	
+	# Restart the timer to give full time for sliding the piece
+	$GravityTimer.start()
+
+
 func _input(event):
 	if event.is_action_pressed("move_left"):
 		move_left()
@@ -36,4 +82,4 @@ func _input(event):
 	elif event.is_action_pressed("rotate"):
 		pass
 	elif event.is_action_pressed("drop"):
-		pass
+		drop()

GameBoard.tscn

@@ -17,3 +17,5 @@ wait_time = 0.5
 autostart = true
 
 [node name="ShapeSquare" parent="." instance=ExtResource( 3 )]
+
+[node name="StaticBlocks" type="Node2D" parent="."]

ShapeSquare.tscn

@@ -1,8 +1,10 @@
-[gd_scene load_steps=2 format=2]
+[gd_scene load_steps=3 format=2]
 
 [ext_resource path="res://Block.tscn" type="PackedScene" id=1]
+[ext_resource path="res://TetrisShape.gd" type="Script" id=2]
 
 [node name="ShapeSquare" type="Node2D"]
+script = ExtResource( 2 )
 
 [node name="Block" parent="." instance=ExtResource( 1 )]
 position = Vector2( 32, 32 )

TetrisShape.gd

@@ -0,0 +1,6 @@
+extends Node2D
+class_name TetrisShape
+
+
+func get_blocks():
+	return get_children()

project.godot

@@ -8,6 +8,16 @@
 
 config_version=4
 
+_global_script_classes=[ {
+"base": "Node2D",
+"class": "TetrisShape",
+"language": "GDScript",
+"path": "res://TetrisShape.gd"
+} ]
+_global_script_class_icons={
+"TetrisShape": ""
+}
+
 [application]
 
 config/name="Tetris"