推箱子

参考

YouTube：https://youtu.be/HmnwNadwHWI
kidscancode：基于网格的运动

extends KinematicBody2D
var grid_size = 16
var inputs ={
    'ui_up':Vector2.UP,
    'ui down'Vector2.DOWN,
    'ui left':Vector2.LEFT,
    'ui_right':Vector2.RIGHT
}
func _unhandled_input(event):
    for dir in inputs.keys():
        if event.is_action_pressed(dir):
            move(dir)
func move(dir):
    position += inputs[dir] * grid_size

extends KinematicBody2D
onready var ray = $RayCast2D
var grid_size = 16
var inputs ={
    'ui_up':Vector2.UP,
    'ui down'Vector2.DOWN,
    'ui left':Vector2.LEFT,
    'ui_right':Vector2.RIGHT
}
func _unhandled_input(event):
    for dir in inputs.keys():
        if event.is_action_pressed(dir):
            move(dir)
func move(dir):
    var vector_pos = inputs[dir] * grid_size 
    ray.cast_to = vector_pos
    ray.force_raycast_update()
    if !ray.is_colliding():
        position += vector_pos

为盒子也添加一个RayCast2D。

extends KinematicBody2D
onready var ray = $RayCast2D
var grid_size = 16
var inputs ={
    'ui_up':Vector2.UP,
    'ui down'Vector2.DOWN,
    'ui left':Vector2.LEFT,
    'ui_right':Vector2.RIGHT
}
func move(dir):
    var vector_pos = inputs[dir] * grid_size 
    ray.cast_to = vector_pos
    ray.force_raycast_update()
    if !ray.is_colliding():
        position += vector_pos
        return true
    return false

将box添加到“box”组。
继续修改Player的代码如下：

extends KinematicBody2D
onready var ray = $RayCast2D
var grid_size = 16
var inputs ={
    'ui_up':Vector2.UP,
    'ui down'Vector2.DOWN,
    'ui left':Vector2.LEFT,
    'ui_right':Vector2.RIGHT
}
func _unhandled_input(event):
    for dir in inputs.keys():
        if event.is_action_pressed(dir):
            move(dir)
func move(dir):
    var vector_pos = inputs[dir] * grid_size 
    ray.cast_to = vector_pos
    ray.force_raycast_update()
    if !ray.is_colliding():
        position += vector_pos
    else：
        var collider = ray.get_collider()
        if collider.is_in_group("box")
            if collider.move(dir):
                position += vector_pos

此时，玩家已经可以推动箱子了。
剩下的就是实现spot的Area2D在body_entered之后，进入下一关或弹出获胜对话框。
这样一个简单的推箱子游戏的核心就有了，就看你如何做出有趣的关卡了。