godot-steering-ai-framework/project/demos/SeekFlee/SeekFleeDemo.gd

extends Node2D
# Access helper class for children to access window boundaries.


enum Mode { FLEE, SEEK }

export(Mode) var behavior_mode := Mode.SEEK setget set_behavior_mode
export(float, 0, 2000, 40) var max_linear_speed := 200.0 setget set_max_linear_speed
export(float, 0, 500, 0.5) var max_linear_accel := 10.0 setget set_max_linear_accel
export(float) var player_speed := 600.0 setget set_player_speed

var camera_boundaries: Rect2

onready var player: KinematicBody2D = $Player
onready var spawner: Node2D = $Spawner


func _ready() -> void:
	camera_boundaries = Rect2(
		Vector2.ZERO,
		Vector2(
			ProjectSettings["display/window/size/width"],
			ProjectSettings["display/window/size/height"]
			)
		)
	
	var rng := RandomNumberGenerator.new()
	rng.randomize()
	
	player.speed = player_speed
	
	for i in range(spawner.entity_count):
		var new_pos := Vector2(
				rng.randf_range(-camera_boundaries.size.x/2, camera_boundaries.size.x/2),
				rng.randf_range(-camera_boundaries.size.y/2, camera_boundaries.size.y/2)
		)
		var entity: KinematicBody2D = spawner.Entity.instance()
		entity.global_position = new_pos
		entity.player_agent = player.agent
		entity.start_speed = max_linear_speed
		entity.start_accel = max_linear_accel
		spawner.add_child(entity)


func set_behavior_mode(mode: int) -> void:
	if not is_inside_tree():
		return
	
	behavior_mode = mode
	match mode:
		Mode.SEEK:
			for child in spawner.get_children():
				child.use_seek = true
		Mode.FLEE:
			for child in spawner.get_children():
				child.use_seek = false


func set_max_linear_speed(value: float) -> void:
	if not is_inside_tree():
		return
	
	max_linear_speed = value
	for child in spawner.get_children():
		child.agent.max_linear_speed = value


func set_max_linear_accel(value: float) -> void:
	if not is_inside_tree():
		return
	
	max_linear_accel = value
	for child in spawner.get_children():
		child.agent.max_linear_acceleration = value


func set_player_speed(value: float) -> void:
	if not is_inside_tree():
		return
	
	player_speed = value
	player.speed = player_speed