Why does my RigidBody2D not pick up at the place I set it at?

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:information_source: Attention Topic was automatically imported from the old Question2Answer platform.
:bust_in_silhouette: Asked By HarryCourt
:warning: Old Version Published before Godot 3 was released.

I have a script that once a player picks up a RigidBody2D, it will pick it up and follow the mouse. However, Once I let go, the sprite doesn’t move and the Collision stays at the place it originally landed. Once I click in the place it landed, the sprite moves back. It is currently in ‘Rigid’ mode.

Here’s the gif:Screen capture - 77eb831c1cde39fb304927e07a50ff55 - Gyazo

Here’s the code:

extends RigidBody2D


# Variables that make it work
onready var spawner = get_node("/root/Scene/Player/Spawner")
onready var canDrag = false

# Stats
var massOutput = get_mass()
var weightOutput = get_weight()

func _ready():
	pass
	
	

func _physics_process(delta):
	
	#var canGrab = mouse_checker_node.is_free
	
	if (Input.is_action_pressed("ui_grabItem") && canDrag == true):
		var mousePos = get_global_mouse_position()
		
		self.set_position(mousePos)
		
	elif (Input.is_action_just_released("ui_grabItem")):
		canDrag = false

func _on_Item_mouse_entered():
	canDrag = true


#func _on_Item_mouse_exited():
#	canDrag = false
4
:bust_in_silhouette: Reply From: avencherus

Haven’t tried it yet in 3.0, but to gracefully move a RigidBody2D, you have to put it to sleep, defer for one frame, then move it and reawaken it.

set_sleeping(true)
call_deferred("move_to", pos)

func move_to(pos):
	set_position(pos)
	set_sleeping(false)

It didn’t fix it, but that might be because of my lousy programming knowledge, care to take a look?

extends RigidBody2D


# Variables that make it work
onready var spawner = get_node("/root/Scene/Player/Spawner")
onready var canDrag = false
onready var mPos = get_local_mouse_position()

# Stats
var massOutput = get_mass()
var weightOutput = get_weight()

func _ready():
	pass
	

func _physics_process(delta):
	
	
	#var canGrab = mouse_checker_node.is_free
	
	if (Input.is_action_pressed("ui_grabItem") && canDrag == true):
		var mousePos = get_global_mouse_position()
		
		self.set_position(mousePos)
		
	elif (Input.is_action_just_released("ui_grabItem")):
		canDrag = false

func _on_Item_mouse_entered():
	canDrag = true




func move_to(mPos):
	set_sleeping(true)
	call_deferred("move_to", mPos)

	set_position(mPos)
	set_sleeping(false)

#func _on_Item_mouse_exited():
#	canDrag = false

HarryCourt | 2017-12-23 11:55

Sorry, I omitted some context to focus on the specific lines.

You want to use it like this (Edited for better context):

func move(mousePos):
    set_sleeping(true)
    call_deferred("move_to", mousePos)


func move_to(mPos):
    set_position(mPos)
    set_sleeping(false)

avencherus | 2017-12-23 14:00

I can’t pick it up still… Samme result in gif

HarryCourt | 2017-12-23 15:01

Sorry, bad context once again, I’m just trying to show the idea, but slapped it mindlessly into your “drag” code.

The logic/algorithm for using this with dragging:

  1. Sleep the body for 1 frame before the first move takes place.
  2. After one frame of sleeping issue position changes normally.
  3. When the drag is released, unsleep the node.

Hope that helps.

avencherus | 2017-12-23 15:14