breadth-first traversal of grid is working!

an array of token groups is calculated successfully
and it's probably fast enough.

grid.gd

@@ -21,10 +21,14 @@ func _ready():
 			var token_node = token.instantiate()
 			add_child(token_node)
 			token_node.position = Vector2(offset*column, offset*row)
+			token_node.set_type(randi_range(0,3 ))
 			token_node.set_debug_label(str(row) + "," + str(column))
 			grid[row].append(token_node)
 			
-	calculate_token_groups()
+	
+func _process(_delta: float) -> void:
+	if Input.is_action_just_pressed("activate"):
+		calculate_token_groups()
 			
 func populate_grid():
 	pass
@@ -54,14 +58,20 @@ func calculate_token_groups():
 				visited_nodes.append(current_coord)
 			
 				var adjacent_token_coords = [
-					[row - 1, col],
+					[current_coord[0] - 1, current_coord[1]],
-					[row, col + 1],
+					[current_coord[0], current_coord[1] + 1],
-					[row + 1, col],
+					[current_coord[0] + 1, current_coord[1]],
-					[row, col - 1]
+					[current_coord[0], current_coord[1] - 1]
 				]
 			
 				var valid_coords = adjacent_token_coords.filter(
-					func(coord_pair): return coord_pair[0] >= 0 and coord_pair[0] < rows and coord_pair[1] >= 0 and coord_pair[1] < cols
+					func(coord_pair): 
+						return (
+							coord_pair[0] >= 0 and 
+							coord_pair[0] < rows and 
+							coord_pair[1] >= 0 and 
+							coord_pair[1] < cols
+						)
 				)
 			
 				for coord in valid_coords:

project.godot

@@ -14,3 +14,16 @@ config/name="combo-car"
 run/main_scene="uid://bai2mcthexgm5"
 config/features=PackedStringArray("4.4", "GL Compatibility")
 config/icon="res://icon.svg"
+
+[input]
+
+activate={
+"deadzone": 0.2,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":32,"key_label":0,"unicode":32,"location":0,"echo":false,"script":null)
+]
+}
+
+[rendering]
+
+renderer/rendering_method="gl_compatibility"
+renderer/rendering_method.mobile="gl_compatibility"

token.gd

@@ -10,8 +10,10 @@ var debug_label: Label
 func _ready():
 	color_polygon = $Color
 	debug_label = $"Debug Label"
-	type = randi_range(0, 3) as token_type
+			
-	match type:
+func set_type(type: token_type):
+	self.type = type
+	match self.type:
 		token_type.TYPE_1:
 			color_polygon.color = Color.RED
 		token_type.TYPE_2: