Godot Version
4.2
Question
I was following GdQuest LaserBeam tutorial and find some issues while converting LeaserBeam2D from Godot 3 to Godot 4.
Original Code
# Casts a laser along a raycast, emitting particles on the impact point.
# Use `is_casting` to make the laser fire and stop.
# You can attach it to a weapon or a ship; the laser will rotate with its parent.
extends RayCast2D
# Speed at which the laser extends when first fired, in pixels per seconds.
export var cast_speed := 7000.0
# Maximum length of the laser in pixels.
export var max_length := 1400.0
# Base duration of the tween animation in seconds.
export var growth_time := 0.1
# If `true`, the laser is firing.
# It plays appearing and disappearing animations when it's not animating.
# See `appear()` and `disappear()` for more information.
var is_casting := false setget set_is_casting
onready var fill := $FillLine2D
onready var tween := $Tween
onready var casting_particles := $CastingParticles2D
onready var collision_particles := $CollisionParticles2D
onready var beam_particles := $BeamParticles2D
onready var line_width: float = fill.width
func _ready() -> void:
set_physics_process(false)
fill.points[1] = Vector2.ZERO
func _physics_process(delta: float) -> void:
cast_to = (cast_to + Vector2.RIGHT * cast_speed * delta).limit_length(max_length)
cast_beam()
func set_is_casting(cast: bool) -> void:
is_casting = cast
if is_casting:
cast_to = Vector2.ZERO
fill.points[1] = cast_to
appear()
else:
# Reset the laser endpoint
fill.points[1] = Vector2.ZERO
collision_particles.emitting = false
disappear()
set_physics_process(is_casting)
beam_particles.emitting = is_casting
casting_particles.emitting = is_casting
# Controls the emission of particles and extends the Line2D to `cast_to` or the ray's
# collision point, whichever is closest.
func cast_beam() -> void:
var cast_point := cast_to
force_raycast_update()
collision_particles.emitting = is_colliding()
if is_colliding():
cast_point = to_local(get_collision_point())
collision_particles.global_rotation = get_collision_normal().angle()
collision_particles.position = cast_point
fill.points[1] = cast_point
beam_particles.position = cast_point * 0.5
beam_particles.process_material.emission_box_extents.x = cast_point.length() * 0.5
func appear() -> void:
if tween.is_active():
tween.stop_all()
tween.interpolate_property(fill, "width", 0, line_width, growth_time * 2)
tween.start()
func disappear() -> void:
if tween.is_active():
tween.stop_all()
tween.interpolate_property(fill, "width", fill.width, 0, growth_time)
tween.start()
My Current Code
extends RayCast2D
@onready var tween: Tween
var is_casting := false:
set = set_is_casting
func _ready():
set_physics_process(false)
$Line2D.points[1] = Vector2.ZERO
func _unhandled_input(event : InputEvent) -> void:
if event is InputEventMouseButton:
self.is_casting = event.pressed
func _physics_process(_delta: float) -> void:
var cast_point := target_position
force_raycast_update()
if is_colliding():
cast_point = to_local(get_collision_point())
$Line2D.points[1] = cast_point
func set_is_casting(cast: bool) -> void:
is_casting = cast
set_physics_process(is_casting)
if is_casting:
appear()
else:
dissapper()
func appear() -> void:
if is_instance_valid(tween):
tween.kill()
tween = create_tween()
tween.tween_property($Line2D, "width", 0, 10.0)
func dissapper() -> void:
if is_instance_valid(tween):
tween.kill()
tween = create_tween()
tween.tween_property($Line2D, "width", 10.0, 0)
I have implemented like this but it only shows the Line2D but does not hide the Line2D, what to do now, please help !!!1
, my bad !!