feat: implement damage dummy system, floating UI numbers, and double-barrel shotgun mechanics

entities/target_dummy.gd

@@ -0,0 +1,85 @@
+extends StaticBody3D
+class_name TargetDummy
+
+var mesh_instance: MeshInstance3D
+var dps_label: Label3D
+
+# Array of dictionaries: { "time": float, "amount": float }
+var damage_history: Array = []
+
+func _ready() -> void:
+	add_to_group("enemies") # Just in case we need to filter
+	
+	# Collision Shape
+	var shape = CollisionShape3D.new()
+	shape.shape = CapsuleShape3D.new()
+	shape.shape.radius = 0.5
+	shape.shape.height = 2.0
+	shape.position = Vector3(0, 1.0, 0)
+	add_child(shape)
+	
+	# Mesh
+	mesh_instance = MeshInstance3D.new()
+	var mesh = CapsuleMesh.new()
+	mesh.radius = 0.5
+	mesh.height = 2.0
+	mesh_instance.mesh = mesh
+	
+	var mat = StandardMaterial3D.new()
+	mat.albedo_color = Color(0.8, 0.2, 0.2) # Red dummy
+	mat.roughness = 0.7
+	mesh.material = mat
+	mesh_instance.position = Vector3(0, 1.0, 0)
+	add_child(mesh_instance)
+	
+	# DPS Label
+	dps_label = Label3D.new()
+	dps_label.text = "DPS: 0"
+	dps_label.pixel_size = 0.01
+	dps_label.billboard = BaseMaterial3D.BILLBOARD_ENABLED
+	dps_label.position = Vector3(0, 2.3, 0)
+	dps_label.modulate = Color(1, 0.8, 0)
+	add_child(dps_label)
+
+func take_damage(amount: float, hit_position: Vector3, source: Node = null) -> void:
+	var now = Time.get_ticks_msec() / 1000.0
+	damage_history.append({"time": now, "amount": amount})
+	
+	if source and source.has_method("spawn_damage_number"):
+		source.spawn_damage_number(amount, hit_position)
+		
+	_wiggle()
+
+func _process(_delta: float) -> void:
+	_update_dps()
+
+func _update_dps() -> void:
+	var now = Time.get_ticks_msec() / 1000.0
+	var total_damage: float = 0.0
+	
+	# Keep only last 5 seconds
+	var valid_history = []
+	for dmg in damage_history:
+		if now - dmg["time"] <= 5.0:
+			valid_history.append(dmg)
+			total_damage += dmg["amount"]
+			
+	damage_history = valid_history
+	
+	if damage_history.size() > 0:
+		var dps = total_damage / 5.0
+		dps_label.text = "DPS: %.1f" % dps
+	else:
+		dps_label.text = "DPS: 0"
+
+func _wiggle() -> void:
+	# Small tween to shake the dummy
+	var tween = create_tween()
+	var orig_pos = Vector3(0, 1.0, 0)
+	var wiggle_dir = Vector3(randf_range(-0.1, 0.1), 0, randf_range(-0.1, 0.1))
+	
+	tween.tween_property(mesh_instance, "position", orig_pos + wiggle_dir, 0.05)
+	tween.tween_property(mesh_instance, "position", orig_pos - wiggle_dir, 0.05)
+	tween.tween_property(mesh_instance, "position", orig_pos, 0.05)
+
+