adds track parser from txt files

RaceTrack.gd

@@ -10,19 +10,22 @@ signal wrong_way(coords)
 # - Build the track Curve2D from track and tiles data
 # - Keyboard controls !!
 
-const TRACK_TILES = Global.TRACKS[0]
-
+var laps
+var current_cell
+onready var track = TrackSelection.get_current_track()
 onready var map = $TileMap
-var laps = 0
-var current_cell = TRACK_TILES[0]
 
 func get_track_offset(coords):
-	var offset = float(TRACK_TILES.find(coords)) / float(len(TRACK_TILES))
+	var offset = float(track.find(coords)) / float(len(track))
 	return offset
 
 # Called when the node enters the scene tree for the first time.
 func _ready():
-	pass # Replace with function body.
+	_reset_progress()
+
+func _reset_progress():
+	laps = 0
+	current_cell = track[0]
 
 func _input(event):
 	# Check if the mouse if following the tiles track
@@ -30,13 +33,13 @@ func _input(event):
 		var hover_cell = map.world_to_map(event.position)
 		if hover_cell != current_cell:  # The mouse moved to a new cell
 			# Check the tile is on path
-			if TRACK_TILES.find(hover_cell) != -1:
+			if track.find(hover_cell) != -1:
 				# Check if a lap is finished
-				if hover_cell == TRACK_TILES[0] and current_cell == TRACK_TILES[-1]:
+				if hover_cell == track[0] and current_cell == track[-1]:
 					laps += 1
 					emit_signal("lap_completed", laps)
 				# Check we are following the path
-				if TRACK_TILES[TRACK_TILES.find(hover_cell) - 1] == current_cell:
+				if track[track.find(hover_cell) - 1] == current_cell:
 					emit_signal("player_moved", laps + get_track_offset(hover_cell))
 					emit_signal("wrong_way", Vector2(-1, -1))
 					current_cell = hover_cell