:art: Enable effect if thrusting enabled

godot/component/ships/BiBiShip.tscn

@@ -1,8 +1,9 @@
-[gd_scene load_steps=43 format=3 uid="uid://dlkwtp1gl45r"]
+[gd_scene load_steps=44 format=3 uid="uid://dlkwtp1gl45r"]
 
 [ext_resource type="Texture2D" uid="uid://duw5x0fjt8jak" path="res://component/ships/NihilAce_spaceship_building_pack_32x32.png" id="1_4y72e"]
 [ext_resource type="Script" path="res://component/ships/ship.gd" id="1_8hr01"]
 [ext_resource type="Texture2D" uid="uid://b71okcm85d6iu" path="res://effect/thrust/thrust_line.png" id="2_ox3u6"]
+[ext_resource type="Script" path="res://effect/thrust/thrust_effect.gd" id="3_y7m5h"]
 
 [sub_resource type="PhysicsMaterial" id="PhysicsMaterial_g1gqc"]
 friction = 0.21
@@ -312,12 +313,13 @@ physics_material_override = SubResource("PhysicsMaterial_g1gqc")
 linear_damp = 0.5
 script = ExtResource("1_8hr01")
 
-[node name="GPUParticles2D" type="GPUParticles2D" parent="."]
+[node name="ThrustEffect" type="GPUParticles2D" parent="."]
 position = Vector2(0, 348)
 amount = 4
 process_material = SubResource("ParticleProcessMaterial_ybpux")
 texture = ExtResource("2_ox3u6")
 local_coords = true
+script = ExtResource("3_y7m5h")
 
 [node name="BiBiShip" type="TileMap" parent="."]
 tile_set = SubResource("TileSet_pl6km")
@@ -331,3 +333,5 @@ shape = SubResource("CapsuleShape2D_scyxd")
 [node name="RearShape" type="CollisionShape2D" parent="."]
 position = Vector2(0, 184.5)
 shape = SubResource("RectangleShape2D_54thx")
+
+[connection signal="thrusted" from="." to="ThrustEffect" method="_on_thrusted"]

godot/component/ships/ship.gd

@@ -3,10 +3,12 @@ extends RigidBody2D
 # Common base script for ships
 
 signal moved(speed: float)
+signal thrusted(power: float)
 
 const THRUST_STRENGTH: float = 400_000.0
 const TORQUE_THRUST: float = 20.0
-const MOVE_CEIL : float = 2
+const MOVE_CEIL : float = 2.0
+const THRUST_CEIL : float = 2.0
 
 var current_force := Vector2.ZERO
 var current_torque : float = 0.0
@@ -16,11 +18,15 @@ func _physics_process(delta):
 	apply_central_force(current_force.rotated(rotation))
 	apply_torque(current_torque)
 
-	var square_speed: float = linear_velocity.length_squared()
-	if square_speed > MOVE_CEIL:
-		moved.emit(sqrt(square_speed))
+	_vec_ceil_emit(linear_velocity, MOVE_CEIL, moved)
+	_vec_ceil_emit(current_force, THRUST_CEIL, thrusted)
+
+func _vec_ceil_emit(vec: Vector2, ceil: float, sig: Signal) -> void:
+	var length_square: float = vec.length_squared()
+	if length_square > ceil:
+		sig.emit(sqrt(length_square))
 	else:
-		moved.emit(0.0)
+		sig.emit(0.0)
 
 
 func _on_command(dir: Vector2) -> void:

godot/effect/thrust/thrust_effect.gd

@@ -0,0 +1,10 @@
+class_name ThrustEffect
+extends GPUParticles2D
+
+
+func _on_thrusted(power: float) -> void:
+	if power == 0.0 :
+		set_emitting(false)
+	else :
+		set_emitting(true)
+