basic piece animation

main.gd

@@ -3,7 +3,7 @@ extends Node3D
 @onready var camera: Camera3D = $Camera
 
 var hist := UndoRedo.new()
-@onready var board := Board.from_string("")
+@onready var board: Board = $Board
 var player: Piece
 var level_num := -1
 var levels_src: PackedStringArray
@@ -78,6 +78,7 @@ func won() -> bool:
 	return true
 
 func advance_level():
+	hist.clear_history()
 	level_num += 1
 	if level_num >= levels_src.size():
 		print("you win")

main.tscn

@@ -1,6 +1,7 @@
-[gd_scene load_steps=5 format=3 uid="uid://lrk2whqxl0w0"]
+[gd_scene load_steps=6 format=3 uid="uid://lrk2whqxl0w0"]
 
 [ext_resource type="Script" uid="uid://c707s0tgd88pg" path="res://main.gd" id="1_ig7tw"]
+[ext_resource type="Script" uid="uid://c8ywa33v3jq7t" path="res://board.gd" id="2_0xm2m"]
 
 [sub_resource type="ProceduralSkyMaterial" id="ProceduralSkyMaterial_ig7tw"]
 ground_bottom_color = Color(0.270778, 0.538085, 0.397052, 1)
@@ -31,3 +32,7 @@ aabb = AABB(-0.25, 0, -0.25, 2, 2, 2)
 [node name="BottomRight" type="VisibleOnScreenNotifier3D" parent="."]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0.25, 0, 0.25)
 aabb = AABB(0, 0, 0, 2, 2, 2)
+
+[node name="Board" type="Node3D" parent="."]
+script = ExtResource("2_0xm2m")
+metadata/_custom_type_script = "uid://c8ywa33v3jq7t"

piece.gd

@@ -13,16 +13,26 @@ enum Type {
 	Player,
 }
 
+## squares per second
+@export_range(0.1, 100) var anim_speed := 10.0
+
 # logical position
 @export var lpos: Vector2i:
 	get:
 		return lpos
 	set(val):
 		lpos = val
-		position = Vector3(val.x, 0, val.y)
+		position = target_pos
+		start_pos = position
+		target_pos = Vector3(lpos.x, position.y, lpos.y)
+		anim_progress = 0
 
 @export var type: Piece.Type
 
+@onready var start_pos := position
+@onready var target_pos := position
+@onready var anim_progress := 1.0
+
 func do_move(move: Vector2i) -> Callable:
 	return func():
 		lpos += move
@@ -50,3 +60,11 @@ static func box(lpos: Vector2i) -> Piece:
 
 static func player(lpos: Vector2i) -> Piece:
 	return make(lpos, Piece.Type.Player, PLAYER)
+
+func _ready() -> void:
+	lpos = lpos
+	anim_progress = 1
+
+func _process(delta: float) -> void:
+	anim_progress = min(1, anim_progress + anim_speed*delta)
+	position = start_pos.lerp(target_pos, anim_progress)