feat: added rocket noises and smoke trails and adjusted AoE of rockets and damage falloff on AoE

weapons/homing_projectile.gd

@@ -8,6 +8,88 @@ var initial_aim_dir: Vector3 = Vector3.ZERO
 var cruise_speed: float = 60.0
 var ignition_timer: float = 0.5
 var ignited: bool = false
+var effects_started: bool = false
+
+func _setup_effects() -> void:
+	pass # Wait until ignited
+
+func _start_homing_effects() -> void:
+	if effects_started: return
+	effects_started = true
+	
+	# Audio
+	flight_sound = AudioStreamPlayer3D.new()
+	flight_sound.stream = load("res://assets/sounds/swarm_flight.wav")
+	flight_sound.autoplay = true
+	if flight_sound.stream is AudioStreamWAV:
+		flight_sound.stream.loop_mode = AudioStreamWAV.LOOP_FORWARD
+	flight_sound.unit_size = 50.0
+	flight_sound.max_db = 6.0
+	flight_sound.volume_db = 6.0
+	add_child(flight_sound)
+	flight_sound.play()
+	
+	# Jet Fire Particles
+	jet_sys = GPUParticles3D.new()
+	var jet_mat = ParticleProcessMaterial.new()
+	jet_mat.direction = Vector3(0, 0, 1)
+	jet_mat.spread = 10.0
+	jet_mat.initial_velocity_min = 0.5
+	jet_mat.initial_velocity_max = 1.0
+	jet_mat.gravity = Vector3.ZERO
+	
+	var jet_mesh = BoxMesh.new()
+	jet_mesh.size = Vector3(0.02, 0.02, 0.02)
+	var mat = StandardMaterial3D.new()
+	mat.albedo_color = Color(1.0, 0.6, 0.0)
+	mat.emission_enabled = true
+	mat.emission = Color(1.0, 0.5, 0.0)
+	jet_mesh.material = mat
+	jet_sys.draw_pass_1 = jet_mesh
+	jet_sys.process_material = jet_mat
+	jet_sys.amount = 16
+	jet_sys.lifetime = 0.15
+	jet_sys.position = Vector3(0, 0, 0.05)
+	add_child(jet_sys)
+	
+	# Smoke Trail
+	smoke_sys = GPUParticles3D.new()
+	var smoke_mat = ParticleProcessMaterial.new()
+	smoke_mat.direction = Vector3(0, 0, 1)
+	smoke_mat.spread = 5.0
+	smoke_mat.initial_velocity_min = 0.0
+	smoke_mat.initial_velocity_max = 0.2
+	smoke_mat.gravity = Vector3(0, 0.5, 0)
+	
+	var grad = Gradient.new()
+	grad.add_point(0.0, Color(0.5, 0.5, 0.5, 0.8))
+	grad.add_point(1.0, Color(0.8, 0.8, 0.8, 0.0))
+	var grad_tex = GradientTexture1D.new()
+	grad_tex.gradient = grad
+	smoke_mat.color_ramp = grad_tex
+	
+	var curve = Curve.new()
+	curve.add_point(Vector2(0.0, 1.0))
+	curve.add_point(Vector2(1.0, 3.0))
+	var curve_tex = CurveTexture.new()
+	curve_tex.curve = curve
+	smoke_mat.scale_curve = curve_tex
+	
+	var smoke_mesh = QuadMesh.new()
+	smoke_mesh.size = Vector2(0.08, 0.08)
+	var s_mat = StandardMaterial3D.new()
+	s_mat.transparency = BaseMaterial3D.TRANSPARENCY_ALPHA
+	s_mat.vertex_color_use_as_albedo = true
+	s_mat.albedo_texture = ExplosiveProjectile.get_smoke_texture()
+	s_mat.billboard_mode = BaseMaterial3D.BILLBOARD_PARTICLES
+	s_mat.billboard_keep_scale = true
+	smoke_mesh.material = s_mat
+	smoke_sys.draw_pass_1 = smoke_mesh
+	smoke_sys.process_material = smoke_mat
+	smoke_sys.amount = 32
+	smoke_sys.lifetime = 1.0
+	smoke_sys.position = Vector3(0, 0, 0.05)
+	add_child(smoke_sys)
 
 func _physics_process(delta: float) -> void:
 	if not ignited:
@@ -15,6 +97,7 @@ func _physics_process(delta: float) -> void:
 		if ignition_timer <= 0.0:
 			ignited = true
 			drop_gravity = 0.0
+			_start_homing_effects()
 			
 	if ignited and is_instance_valid(weapon_source):
 		var target_dir: Vector3 = initial_aim_dir