- Edited
I'm building a simple "push the boxes" system, but something in my code isn't working as expected.
When include at least one box over another and try to push them all, sometimes it just don't move until I move that top box a little bit.
I tried to use RigidBody2d boxes, but it spins when touched... I need the boxes to be aligned to the ground. So this is all Kinematic2dBody.
Any help will be very appreciated!
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The Player is basically the one from the Kinematic 2d platformer demo. Here's my GDS for the box:
extends KinematicBody2D
const PLAYER_SCALE = 2
const FLOOR_NORMAL = Vector2(0, -2)
const SLOPE_SLIDE_STOP = 25.0
const WALK_SPEED = 150 # pixels/sec
const TOP = 0
const BOTTOM = 1
const LEFT = 2
const RIGHT = 3
var linear_vel = Vector2()
var direction = 0
var on_floor = false
var can_play_sound = true
var top_area_bodies = []
var bottom_area_bodies = []
var left_area_bodies = []
var right_area_bodies = []
onready var box_sm = $box_sm
onready var anim = $anim
onready var player = global.get_player()
func _ready():
reset()
func reset():
global.boxes.append(self)
func _apply_gravity(delta):
linear_vel.y += delta * global.GRAVITY
func _apply_movement(delta):
var previous_direction = direction
var desaccel = 0
direction = 0
for surface in [TOP, BOTTOM, LEFT, RIGHT]:
check_surface(surface)
if player.player_sm.is_on(player.player_sm.states.push):
if player.siding_left:
for body in right_area_bodies:
if global.is_player(body) and box_sm.is_on(box_sm.states.idle):
if box_sm.is_on(box_sm.states.idle):
direction = -1
else:
direction = -1.5
elif !player.siding_left:
for body in left_area_bodies:
if global.is_player(body):
if box_sm.is_on(box_sm.states.idle):
direction = 1
else:
direction = 1.5
if player.player_sm.is_on(player.player_sm.states.push) and direction == 0 and previous_direction != 0:
direction = previous_direction
if box_sm.is_on(box_sm.states.floating):
play_sound(global.sound_splash)
else:
play_sound(global.sound_push)
if linear_vel.x != 0:
if linear_vel.x < 0:
for body in left_area_bodies:
if global.is_box(body):
body.linear_vel.x = linear_vel.x
elif linear_vel.x > 0:
for body in right_area_bodies:
if global.is_box(body):
body.linear_vel.x = linear_vel.x
for body in top_area_bodies:
if linear_vel.x > 0 and linear_vel.x < body.linear_vel.x: return
elif linear_vel.x < 0 and linear_vel.x > body.linear_vel.x: return
body.linear_vel.x = linear_vel.x
if box_sm.is_on(box_sm.states.idle):
desaccel = 0.5
else:
desaccel = 0.05
linear_vel = move_and_slide(linear_vel, FLOOR_NORMAL, SLOPE_SLIDE_STOP)
linear_vel.x = lerp(linear_vel.x, direction * WALK_SPEED, desaccel)
on_floor = is_on_floor()
func check_surface(area):
var in_sewer = false
var body = null
match area:
LEFT:
left_area_bodies.clear()
for body in $Area2D_left.get_overlapping_bodies():
if body == self: continue
if global.is_box(body) or global.is_player(body):
left_area_bodies.append(body)
RIGHT:
right_area_bodies.clear()
for body in $Area2D_right.get_overlapping_bodies():
if body == self: continue
if global.is_box(body) or global.is_player(body):
right_area_bodies.append(body)
TOP:
top_area_bodies.clear()
for body in $Area2D_top.get_overlapping_bodies():
if body == self: continue
if global.is_box(body):
top_area_bodies.append(body)
BOTTOM:
bottom_area_bodies.clear()
for body in $Area2D_bottom.get_overlapping_bodies():
if body == self: continue
if global.is_player(body):
linear_vel.y = -WALK_SPEED
if global.is_sewer(body):
in_sewer = true
if global.is_box(body):
bottom_area_bodies.append(body)
if box_sm.is_on(box_sm.states.idle):
if in_sewer:
box_sm.set_state(box_sm.states.floating)
elif box_sm.is_on(box_sm.states.floating):
if !in_sewer:
box_sm.set_state(box_sm.states.idle)
func play_sound(stream, force=false):
if not force and not can_play_sound: return
can_play_sound = false
$sound.stream = stream
$sound.play()
func _on_Area2D_top_body_entered(body):
if global.is_box(body):
global.set_all_zindex()
func _on_sound_finished():
can_play_sound = true
