Fix pawn direction code, add EMPTY constant to grid

Author: NathanLovato

2d/grid_based_movement/Game.tscn

@@ -8,9 +8,9 @@
 [ext_resource path="res://pawns/sprites/character_grey.png" type="Texture" id=6]
 [ext_resource path="res://pawns/sprites/star.png" type="Texture" id=7]
 
-[node name="Game" type="Node" index="0"]
+[node name="Game" type="Node"]
 
-[node name="Grass" type="TileMap" parent="." index="0"]
+[node name="GridLines" type="TileMap" parent="." index="0"]
 
 modulate = Color( 1, 1, 1, 0.271059 )
 z_index = -1
@@ -95,81 +95,5 @@ type = 2
 
 texture = ExtResource( 7 )
 
-[node name="Object2" type="Node2D" parent="Grid" index="3"]
-
-editor/display_folded = true
-position = Vector2( 800, 416 )
-script = ExtResource( 5 )
-type = 2
-
-[node name="Sprite" type="Sprite" parent="Grid/Object2" index="0"]
-
-texture = ExtResource( 7 )
-
-[node name="Object3" type="Node2D" parent="Grid" index="4"]
-
-editor/display_folded = true
-position = Vector2( 800, 288 )
-script = ExtResource( 5 )
-type = 2
-
-[node name="Sprite" type="Sprite" parent="Grid/Object3" index="0"]
-
-texture = ExtResource( 7 )
-
-[node name="Object4" type="Node2D" parent="Grid" index="5"]
-
-editor/display_folded = true
-position = Vector2( 672, 288 )
-script = ExtResource( 5 )
-type = 2
-
-[node name="Sprite" type="Sprite" parent="Grid/Object4" index="0"]
-
-texture = ExtResource( 7 )
-
-[node name="Object5" type="Node2D" parent="Grid" index="6"]
-
-position = Vector2( 672, 544 )
-script = ExtResource( 5 )
-type = 2
-
-[node name="Sprite" type="Sprite" parent="Grid/Object5" index="0"]
-
-texture = ExtResource( 7 )
-
-[node name="Object6" type="Node2D" parent="Grid" index="7"]
-
-editor/display_folded = true
-position = Vector2( 352, 480 )
-script = ExtResource( 5 )
-type = 2
-
-[node name="Sprite" type="Sprite" parent="Grid/Object6" index="0"]
-
-texture = ExtResource( 7 )
-
-[node name="Object7" type="Node2D" parent="Grid" index="8"]
-
-editor/display_folded = true
-position = Vector2( 352, 352 )
-script = ExtResource( 5 )
-type = 2
-
-[node name="Sprite" type="Sprite" parent="Grid/Object7" index="0"]
-
-texture = ExtResource( 7 )
-
-[node name="Object8" type="Node2D" parent="Grid" index="9"]
-
-editor/display_folded = true
-position = Vector2( 480, 544 )
-script = ExtResource( 5 )
-type = 2
-
-[node name="Sprite" type="Sprite" parent="Grid/Object8" index="0"]
-
-texture = ExtResource( 7 )
-
 
 [editable path="Grid/Actor"]

2d/grid_based_movement/grid/grid.gd

@@ -1,6 +1,6 @@
 extends TileMap
 
-enum CELL_TYPES { ACTOR, OBSTACLE, OBJECT }
+enum CELL_TYPES { EMPTY = -1, ACTOR, OBSTACLE, OBJECT}
 
 func _ready():
 	for child in get_children():
@@ -19,7 +19,7 @@ func request_move(pawn, direction):
 
 	var cell_target_type = get_cellv(cell_target)
 	match cell_target_type:
-		-1:
+		EMPTY:
 			return update_pawn_position(pawn, cell_start, cell_target)
 		OBJECT:
 			var object_pawn = get_cell_pawn(cell_target)
@@ -32,5 +32,5 @@ func request_move(pawn, direction):
 
 func update_pawn_position(pawn, cell_start, cell_target):
 	set_cellv(cell_target, pawn.type)
-	set_cellv(cell_start, -1)
+	set_cellv(cell_start, EMPTY)
 	return map_to_world(cell_target) + cell_size / 2

2d/grid_based_movement/pawns/Actor.tscn

@@ -3,7 +3,6 @@
 [ext_resource path="res://pawns/actor.gd" type="Script" id=1]
 [ext_resource path="res://pawns/sprites/character.png" type="Texture" id=2]
 
-
 [sub_resource type="Animation" id=1]
 
 resource_name = "bump"
@@ -103,6 +102,7 @@ _sections_unfolded = [ "Transform" ]
 
 [node name="Sprite" type="Sprite" parent="Pivot" index="0"]
 
+position = Vector2( 1.43051e-06, -1.90735e-06 )
 texture = ExtResource( 2 )
 centered = false
 offset = Vector2( -32, -32 )

2d/grid_based_movement/pawns/actor.gd

@@ -1,4 +1,4 @@
-extends 'pawn.gd'
+extends "pawn.gd"
 
 onready var Grid = get_parent()
 
@@ -15,7 +15,6 @@ func _process(delta):
 	var target_position = Grid.request_move(self, input_direction)
 	if target_position:
 		move_to(target_position)
-		$Tween.start()
 	else:
 		bump()
 
@@ -34,11 +33,16 @@ func update_look_direction(direction):
 func move_to(target_position):
 	set_process(false)
 	$AnimationPlayer.play("walk")
-	var move_direction = (position - target_position).normalized()
-	$Tween.interpolate_property($Pivot, "position", move_direction * 32, Vector2(), $AnimationPlayer.current_animation_length, Tween.TRANS_LINEAR, Tween.EASE_IN)
-	$Pivot/Sprite.position = position - target_position
+
+	# Move the node to the target cell instantly,
+	# and animate the sprite moving from the start to the target cell
+	var move_direction = (target_position - position).normalized()
+	$Tween.interpolate_property($Pivot, "position", - move_direction * 32, Vector2(), $AnimationPlayer.current_animation_length, Tween.TRANS_LINEAR, Tween.EASE_IN)
 	position = target_position
-	
+
+	$Tween.start()
+
+	# Stop the function execution until the animation finished
 	yield($AnimationPlayer, "animation_finished")
 
 	set_process(true)