added pipe rifle animation

PCs/spring.gd

@@ -0,0 +1,41 @@
+class_name Spring
+extends Node3D
+
+@export var hero: Hero
+@export var hud: HUD
+
+@export var hud_affect: float
+@export var affect: Node3D
+
+@export var AccelerationScale: float = 200.0
+@export var MaxAcceleration: float = 0.3
+@export var Rebound: float = 2.0
+@export var Damping: float = 14.0
+
+var previousVelocity: Vector3;
+var AccumulatedDifferential: Vector3;
+var AccumulatedDeflection: Vector3;
+
+
+func _process(delta: float) -> void:
+	var current_velocity: Vector3 = hero.velocity
+	var acceleration: Vector3 = previousVelocity - current_velocity
+	
+	acceleration /= AccelerationScale;
+	
+	if (acceleration.length() > MaxAcceleration):
+		acceleration = acceleration.normalized() * MaxAcceleration;
+
+	AccumulatedDifferential += acceleration;
+	AccumulatedDeflection += AccumulatedDifferential;
+	AccumulatedDifferential -= AccumulatedDeflection * Rebound * delta;
+	AccumulatedDeflection -= AccumulatedDeflection * Damping * delta;
+	
+	previousVelocity = current_velocity;
+	
+	position.y = AccumulatedDeflection.y
+	if affect:
+		affect.position.y = AccumulatedDeflection.y
+		affect.position.x = AccumulatedDeflection.z
+	if hud:
+		hud.offset = Vector2(AccumulatedDeflection.x, AccumulatedDeflection.y) * hud_affect