Updated ConnectionCable

game/levels/test_level.gd

@@ -4,3 +4,4 @@ extends AbstractLevel
 func _ready() -> void:
 	super._ready()
 	$Objects/Lever.switching.connect($Doors/LeverDoor.toggle)
+	$Objects/Lever.switching.connect($ConnectionCables/ConnectionCable.toggle)

game/objects/interactive/connection_cable.gd

@@ -2,30 +2,67 @@ class_name ConnectionCable
 extends Line2D
 
 
-const SHADER_GLOW_INTERVAL = "glow_interval"
-const SHADER_GLOW_RADIUS = "glow_radius"
-const SHADER_TRAVEL_TIME = "travel_time"
+const SHADER_GLOW_INTERVAL = "shader_parameter/glow_interval"
+const SHADER_GLOW_RADIUS = "shader_parameter/glow_radius"
+const SHADER_TRAVEL_TIME = "shader_parameter/travel_time"
 
-const TRAVEL_SPEED = 100.0
+const TRAVEL_SPEED_ON = 150.0
+const TRAVEL_SPEED_OFF = 75.0
 const GLOW_INTERVAL = 100.0
 
+const SWITCH_TIME = 0.15
+
+
+@export var is_on := false:
+	set(value):
+		is_on = value
+		if is_node_ready():
+			_play_toggle_animation()
+
+
+var _shader_tween : Tween
+
+
+@onready var length := _get_length()
+@onready var glow_interval := 1.0 / maxi(1, round(length/GLOW_INTERVAL))
+@onready var glow_radius := 0.5/length
+@onready var travel_time_on := _get_travel_time(TRAVEL_SPEED_ON)
+@onready var travel_time_off := _get_travel_time(TRAVEL_SPEED_OFF)
+
 
 func _ready() -> void:
-	var length := _get_length()
-	var glow_interval := 1.0 / maxi(1, round(length/GLOW_INTERVAL))
-	var glow_radius := 0.5/length
-	var travel_time := length/TRAVEL_SPEED
+	material.set(SHADER_GLOW_INTERVAL, glow_interval)
+	material.set(SHADER_GLOW_RADIUS, glow_radius)
+	material.set(SHADER_TRAVEL_TIME, _get_current_travel_time())
+
+
+func toggle() -> void:
+	is_on = not is_on
+
+
+func _play_toggle_animation() -> void:
+	if _shader_tween and _shader_tween.is_running():
+		_shader_tween.kill()
+	_shader_tween = create_tween()
 	
-	material.set_shader_parameter(SHADER_GLOW_INTERVAL, glow_interval)
-	material.set_shader_parameter(SHADER_GLOW_RADIUS, glow_radius)
-	material.set_shader_parameter(SHADER_TRAVEL_TIME, travel_time)
+	_shader_tween.tween_property(material, SHADER_GLOW_RADIUS, glow_interval, SWITCH_TIME)
+	_shader_tween.tween_property(material, SHADER_TRAVEL_TIME, _get_current_travel_time(), 0.0)
+	_shader_tween.tween_property(material, SHADER_GLOW_RADIUS, glow_radius, SWITCH_TIME)
 
 
 func _get_length() -> float:
 	if points.size() < 2:
 		return 0.0
 	
-	var length := 0.0
+	var l := 0.0
 	for i in range(points.size() - 1):
-		length += points[i].distance_to(points[i + 1])
-	return length
+		l += points[i].distance_to(points[i + 1])
+	return l
+
+
+func _get_travel_time(speed: float) -> float:
+	return length/speed
+
+
+func _get_current_travel_time() -> float:
+	return travel_time_on if is_on else travel_time_off

game/platform/abstract_platform.gd

@@ -3,6 +3,10 @@ class_name AbstractPlatform
 extends AnimatableBody2D
 
 
+const SHADER_SEED = "shader_parameter/seed"
+const SHADER_TILE_SIZE = "shader_parameter/tile_size"
+const SHADER_PLATFORM_WIDTH = "shader_parameter/platform_width"
+
 const ANIMATION_COLOR_SWITCHING = "color_switching"
 const ANIMATION_HIDING = "hiding"
 const ANIMATION_TIMER = "timer"
@@ -39,8 +43,8 @@ const MAX_WIDTH = TILE_SIZE * 32
 
 func _ready() -> void:
 	if not Engine.is_editor_hint():
-		platform_rect.material.set_shader_parameter("seed", randf())
-	platform_rect.material.set_shader_parameter("tile_size", TILE_SIZE)
+		platform_rect.material.set(SHADER_SEED, randf())
+	platform_rect.material.set(SHADER_TILE_SIZE, TILE_SIZE)
 	rebuild_platform()
 
 
@@ -55,4 +59,4 @@ func rebuild_platform() -> void:
 	platform_rect.size.x = platform_width
 	platform_rect.position = Vector2.ZERO
 	
-	platform_rect.material.set_shader_parameter("platform_width", platform_width)
+	platform_rect.material.set(SHADER_PLATFORM_WIDTH, platform_width)

game/shaders/connection_cable.gdshader

@@ -14,6 +14,7 @@ float get_alpha(vec2 uv, float offset) {
 void fragment() {
 	float alpha = 0.0;
 	float offset = 0.0;
+	
 	for (float offset = 0.0; offset <= 1.0; offset += glow_interval) {
 		alpha += get_alpha(UV, offset);
 	}