Explosion_der_Spiele/scripts/vfx/melee_vfx.gd

extends Node3D
class_name MeleeVfx
## Visible melee swing (fist/tooth/sword) + range rings + hit particles.

@export var attack_range: float = 2.75
@export var interact_range: float = 2.8

var _swinging: bool = false
var _swing_t: float = 0.0
var _swing_dur: float = 0.22
var _weapon: Node3D
var _weapon_bill: BillboardSprite
var _atk_ring: MeshInstance3D
var _use_ring: MeshInstance3D
var _particles: CPUParticles3D

func _ready() -> void:
	_build_weapon()
	_build_rings()
	_build_particles()
	visible = true

func _build_weapon() -> void:
	_weapon = Node3D.new()
	_weapon.name = "WeaponSwing"
	add_child(_weapon)
	var packed: PackedScene = load("res://scenes/prefabs/billboard_sprite.tscn")
	if packed:
		_weapon_bill = packed.instantiate()
		_weapon.add_child(_weapon_bill)
		_weapon_bill.position = Vector3(0.85, 0.9, 0.0)
		_weapon_bill.set_target_height(0.55)
		_weapon_bill.max_width = 0.7
	_weapon.visible = false

func _build_rings() -> void:
	_atk_ring = _make_ring(Color(1.0, 0.35, 0.25, 0.35), attack_range)
	_atk_ring.name = "AttackRangeRing"
	add_child(_atk_ring)
	_use_ring = _make_ring(Color(1.0, 0.9, 0.25, 0.28), interact_range)
	_use_ring.name = "InteractRangeRing"
	add_child(_use_ring)
	_atk_ring.visible = false
	_use_ring.visible = false

func _make_ring(color: Color, radius: float) -> MeshInstance3D:
	var mi := MeshInstance3D.new()
	var torus := TorusMesh.new()
	torus.inner_radius = maxf(0.05, radius - 0.06)
	torus.outer_radius = radius
	torus.rings = 12
	torus.ring_segments = 24
	mi.mesh = torus
	var mat := StandardMaterial3D.new()
	mat.shading_mode = BaseMaterial3D.SHADING_MODE_UNSHADED
	mat.transparency = BaseMaterial3D.TRANSPARENCY_ALPHA
	mat.albedo_color = color
	mat.cull_mode = BaseMaterial3D.CULL_DISABLED
	mi.material_override = mat
	mi.position = Vector3(0, 0.05, 0)
	mi.rotation_degrees = Vector3(0, 0, 0)
	return mi

func _build_particles() -> void:
	_particles = CPUParticles3D.new()
	_particles.name = "HitParticles"
	_particles.emitting = false
	_particles.one_shot = true
	_particles.explosiveness = 0.95
	_particles.amount = 18
	_particles.lifetime = 0.35
	_particles.direction = Vector3(0, 1, 0)
	_particles.spread = 180.0
	_particles.initial_velocity_min = 2.5
	_particles.initial_velocity_max = 6.0
	_particles.gravity = Vector3(0, -8, 0)
	_particles.scale_amount_min = 0.08
	_particles.scale_amount_max = 0.18
	var mat := StandardMaterial3D.new()
	mat.shading_mode = BaseMaterial3D.SHADING_MODE_UNSHADED
	mat.albedo_color = Color(1.0, 0.85, 0.3)
	mat.billboard_mode = BaseMaterial3D.BILLBOARD_ENABLED
	_particles.mesh = SphereMesh.new()
	(_particles.mesh as SphereMesh).radius = 0.08
	(_particles.mesh as SphereMesh).height = 0.16
	_particles.material_override = mat
	add_child(_particles)

func _process(delta: float) -> void:
	if _swinging:
		_swing_t += delta
		var u := clampf(_swing_t / _swing_dur, 0.0, 1.0)
		# Arc from -70° to +70° around player up-axis
		var ang := deg_to_rad(lerp(-70.0, 70.0, u))
		_weapon.rotation = Vector3(0, ang, 0)
		_weapon.position = Vector3(0, 0.15 + 0.1 * sin(u * PI), 0)
		if u >= 1.0:
			_swinging = false
			_weapon.visible = false

func set_ranges(attack_r: float, interact_r: float) -> void:
	attack_range = attack_r
	interact_range = interact_r
	_resize_ring(_atk_ring, attack_r)
	_resize_ring(_use_ring, interact_r)

func _resize_ring(mi: MeshInstance3D, radius: float) -> void:
	if mi == null:
		return
	var torus := TorusMesh.new()
	torus.inner_radius = maxf(0.05, radius - 0.07)
	torus.outer_radius = radius
	torus.rings = 12
	torus.ring_segments = 24
	mi.mesh = torus

func show_attack_range(on: bool) -> void:
	if _atk_ring:
		_atk_ring.visible = on

func show_interact_range(on: bool) -> void:
	if _use_ring:
		_use_ring.visible = on

func play_swing() -> void:
	_refresh_weapon_texture()
	_swinging = true
	_swing_t = 0.0
	_weapon.visible = true
	_weapon.rotation = Vector3(0, deg_to_rad(-70), 0)

func burst_at(world_pos: Vector3, hit: bool) -> void:
	if _particles == null:
		return
	_particles.global_position = world_pos + Vector3(0, 0.9, 0)
	var mat := _particles.material_override as StandardMaterial3D
	if mat:
		mat.albedo_color = Color(1.0, 0.35, 0.25) if hit else Color(0.7, 0.7, 0.75)
	_particles.restart()
	_particles.emitting = true

func _refresh_weapon_texture() -> void:
	if _weapon_bill == null:
		return
	var path := "res://assets/sprites/placeholders/fist.png"
	var h := 0.55
	if Inventory.has_item("moon_sword"):
		path = "res://assets/sprites/placeholders/moon_sword.png"
		h = 0.9
	elif Inventory.has_item("wartchen"):
		path = "res://assets/sprites/placeholders/wartchen.png"
		h = 0.65
	elif Inventory.has_item("tooth"):
		path = "res://assets/sprites/placeholders/tooth.png"
		h = 0.6
	_weapon_bill.set_target_height(h)
	var tex: Texture2D = load(path)
	if tex:
		_weapon_bill.set_texture(tex)