Projectile.gd

extends MeshInstance3D

#var SHAPE := preload("res://enemies/ProjectileShape.tres")
@onready var SHAPE : SphereShape3D = $CollisionShape3D.shape

var query := PhysicsShapeQueryParameters3D.new()
@onready var spacestate := get_world_3d().direct_space_state

var damage := 1.
var speed := 30.
@export var vel : Vector3
var rot : Vector3
@export var projtype : String
@export var animationplayer : AnimationPlayer
var target : CharacterBody3D
var exception : String
var timemax := 5.
var type := "Regular"
var bonusproportey
var size := 1.
#@export_enum("Regular","Homing","Splitting","Growing","Large","Stationary") var type : String


func _ready():
	set("instance_shader_parameters/offset_fres",.3)
	query.shape = SHAPE
	query.collide_with_bodies = true
	# in decimal binary 2^(layer -1)
	query.collision_mask = 256
	UI.projectilenumber += 1
	scale = Vector3(size,size,size)
	
var time := 0.
var tm := 0.
func _process(delta):
	if(time == 0):
		scale = Vector3(size,size,size)
	time += delta
	tm += delta
	if(time > timemax):
		Perish()
	match type:
		"Regular":
			global_position += vel * delta * speed
		"Homing":
			if(!target):
				return
			global_position += (target.col.global_position - global_position).normalized() * delta * speed
		"Growing":
			global_position += vel * delta * speed
			scale += Vector3(1,1,1) * delta * bonusproportey
		"Homingacc":
			if(!target):
				return
			vel += (target.global_position - global_position).normalized() * delta * bonusproportey
			vel = vel.normalized()
			global_position += vel * delta * speed
		"Homing&Growing":
			if(!target):
				return
			global_position += (target.global_position - global_position).normalized() * delta * speed
			scale += Vector3(1,1,1) * delta * bonusproportey
		"Slowing":
			global_position += vel * delta * speed
			speed -= delta * bonusproportey * speed
			if(speed < 0):
				speed = 0
	var tim = .02
	if(tm > tim):
		tm -= tim
		CheckCollision()

func CheckCollision():
	query.transform = global_transform
	var result := spacestate.intersect_shape(query) # could also be collide_shape(), intersect_shape(), cast_motion(), get_rest_info()
	if(result):
		#queue_free()
		var collider = result[0].collider
		if(collider.name == exception or collider.name == "Floor"):
			return
		if(collider.has_method("OnDamageTaken")):
			collider.OnDamageTaken(self, 0, 0, damage)
		
		Perish()

func Perish():
	var tween = get_tree().create_tween()
	set_process(false)
	await tween.tween_property(self,"transparency",1,.2).finished
	process_mode = Node.PROCESS_MODE_DISABLED
	hide()