feat: implement plasma gun and rocket swarm mechanics along with various 3D asset imports

weapons/plasma_gun.gd

@@ -17,37 +17,23 @@ func _init() -> void:
 	projectile_gravity = 0.0
 
 func _build_model() -> void:
-	position = Vector3(0.3, -0.3, -0.6)
-	
-	var white_mat = StandardMaterial3D.new()
-	white_mat.albedo_color = Color(0.8, 0.8, 0.9)
-	var glow_mat = StandardMaterial3D.new()
-	glow_mat.albedo_color = Color(0.2, 0.5, 1.0)
-	glow_mat.emission_enabled = true
-	glow_mat.emission = Color(0.2, 0.5, 1.0)
-	glow_mat.emission_energy_multiplier = 4.0
-	
-	# Body
-	var body = MeshInstance3D.new()
-	var b_mesh = BoxMesh.new()
-	b_mesh.size = Vector3(0.08, 0.14, 0.35)
-	b_mesh.material = white_mat
-	body.mesh = b_mesh
-	body.position = Vector3(0, 0, 0.05)
-	model_root.add_child(body)
-	
-	# Glow Core
-	var core = MeshInstance3D.new()
-	var c_mesh = CylinderMesh.new()
-	c_mesh.top_radius = 0.02
-	c_mesh.bottom_radius = 0.02
-	c_mesh.height = 0.4
-	c_mesh.material = glow_mat
-	core.mesh = c_mesh
-	core.rotation.x = deg_to_rad(90)
-	core.position = Vector3(0, 0.02, -0.15)
-	model_root.add_child(core)
-	
+	position = Vector3(0.3, -0.3, -0.656)
+
+	var model_scene = load("res://assets/weapons/plasmagun/source/Plasma rifle.fbx")
+	if model_scene:
+		var model = model_scene.instantiate()
+		model_root.add_child(model)
+		model.scale = Vector3(1.0, 1.0, 1.0)
+		model.rotation_degrees.y = 180
+		for light in model.find_children("*", "Light3D", true, false):
+			light.queue_free()
+
+		var mat = StandardMaterial3D.new()
+		mat.albedo_texture = load("res://assets/weapons/plasmagun/textures/Plasma_rifle.png")
+
+		for child in model.find_children("*", "MeshInstance3D", true, false):
+			child.set_surface_override_material(0, mat)
+
 	# Muzzle Flash
 	muzzle_flash = OmniLight3D.new()
 	muzzle_flash.light_color = Color(0.2, 0.5, 1.0)