Added ConnectionCable

game/objects/interactive/connection_cable.gd

@@ -0,0 +1,31 @@
+class_name ConnectionCable
+extends Line2D
+
+
+const SHADER_GLOW_INTERVAL = "glow_interval"
+const SHADER_GLOW_RADIUS = "glow_radius"
+const SHADER_TRAVEL_TIME = "travel_time"
+
+const TRAVEL_SPEED = 100.0
+const GLOW_INTERVAL = 100.0
+
+
+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_parameter(SHADER_GLOW_INTERVAL, glow_interval)
+	material.set_shader_parameter(SHADER_GLOW_RADIUS, glow_radius)
+	material.set_shader_parameter(SHADER_TRAVEL_TIME, travel_time)
+
+
+func _get_length() -> float:
+	if points.size() < 2:
+		return 0.0
+	
+	var length := 0.0
+	for i in range(points.size() - 1):
+		length += points[i].distance_to(points[i + 1])
+	return length