ICBM.tscn

[gd_scene load_steps=4 format=2]

[ext_resource path="res://assets/icbm.png" type="Texture" id=1]

[sub_resource type="GDScript" id=1]
script/source = "# ICBM Scene
extends Node2D

var Explode = preload(\"res://Explode.tscn\")

var rng = RandomNumberGenerator.new()

var targets setget set_targets

signal icbm_hit

var attack_color = Color(0, 0, 100)
var phase = 0
var start_loc = Vector2(0, 0)
var end_loc = Vector2(0, 0)
var cur_loc = null
var missile_speed = 2
var mirv = false
var mirv_child = false
var mirv_target_y
var mirv_splits
var parent_start_loc
var parent_split_loc
var bomber_child = false
var mirv_can_split = true
var mirv_too_low = false

signal mirv_splitting(start_loc, end_loc, can_sub_split)

signal mirv_hit(splits)

var missile_dir = Vector2(0,0)


# Called when the node enters the scene tree for the first time.
func _ready():
	rng.randomize()
	if missile_speed == 0:
		missile_speed = 4

	if not mirv_child and not bomber_child:
		var x = rng.randf_range(0, 1000)
		start_loc = Vector2(x, 0)
		var offset = randi() % targets.size()
		end_loc = targets[offset] # Random base or city location
	var viewport = get_viewport_rect().size
	if mirv and start_loc.y + 10 < 5 * viewport.y / 8:
		mirv_target_y = rng.randf_range(max(start_loc.y + 10, viewport.y / 4), 5 * viewport.y / 8)
	elif mirv:
		mirv_too_low = true
			

	$ICBMArea.position = start_loc
	var velocity = start_loc.direction_to(end_loc)
	var angle = rad2deg(velocity.angle()) + 90
	$ICBMArea.set_rotation_degrees(angle)
	var _err = $ICBMArea.connect(\"area_entered\", self, \"icbm_hit\")


# Called every frame. 'delta' is the elapsed time since the previous frame.
# Use this to size the explosion... 
func _process(_delta):
	
	if phase == 0:
		move_missile()
	elif phase == 1:
		on_explode()

func _draw():
	if cur_loc != null && phase == 0:
#		draw_line(start_loc, end_loc, Color(30,30,30)) # debug
		draw_line(start_loc, cur_loc, attack_color)


func on_explode():
	$ICBMArea/CollisionShape2D/Scud.visible = false
	
	var explode_instance = Explode.instance()
	explode_instance.position = $ICBMArea.position
	add_child(explode_instance)
	
	phase = 2
	
	explode_instance.connect(\"explode_end\", self, \"_on_icbm_explode\")
	update()

	
func move_missile():
	var old_position = $ICBMArea.position
	var velocity = start_loc.direction_to(end_loc) * missile_speed
	cur_loc = old_position + velocity
	
	$ICBMArea.position = cur_loc
	update()
	if mirv and mirv_can_split and not mirv_too_low and cur_loc.y > mirv_target_y:
		mirv_can_split = false
		var target
		var mirv_targets = targets.duplicate(true) # Create clone to not mess with original array
		var viewport = get_viewport_rect().size
		for _i in range(mirv_splits):
			target = randi() % mirv_targets.size()
			emit_signal(\"mirv_splitting\", cur_loc, mirv_targets[target], cur_loc.y < (3 * viewport.y / 4))
			mirv_targets.remove(target)
		# on_end()
	elif cur_loc.y > end_loc.y:
		phase = 1


func icbm_hit(_object):
	if phase == 0:
		phase = 1

	
func _on_icbm_explode():
	if mirv and mirv_can_split:
		emit_signal(\"mirv_hit\", mirv_splits)
	else:
		emit_signal(\"icbm_hit\")
	on_end()


func on_end():
	queue_free()


func set_targets(new_targets):
	targets = new_targets


func set_color(new_value):
	attack_color = new_value


func set_speed(new_value):
	missile_speed = new_value


func set_mirv(new_boolean):
	mirv = new_boolean


func set_mirv_child(new_boolean):
	mirv_child = new_boolean


func set_mirv_splits(new_value):
	mirv_splits = new_value


func set_start_loc(new_value):
	start_loc = new_value


func set_end_loc(new_value):
	end_loc = new_value


func set_parent_start_loc(new_value):
	parent_start_loc = new_value


func set_parent_split_loc(new_value):
	parent_split_loc = new_value


func set_bomber_child(new_boolean):
	bomber_child = new_boolean
"

[sub_resource type="RectangleShape2D" id=2]
extents = Vector2( 1.94781, 6.59768 )

[node name="ICBM" type="Node2D"]
script = SubResource( 1 )

[node name="ICBMArea" type="Area2D" parent="."]
collision_mask = 4

[node name="CollisionShape2D" type="CollisionShape2D" parent="ICBMArea"]
shape = SubResource( 2 )

[node name="Scud" type="Sprite" parent="ICBMArea/CollisionShape2D"]
position = Vector2( 0.118118, 0.833971 )
scale = Vector2( 0.3, 0.3 )
texture = ExtResource( 1 )