extends SceneTree
const EffectPlayer = preload("res://fx/effect_player.gd")
var failures := 0
func check(ok: bool, label: String) -> void:
	if not ok:
		failures += 1
		printerr("FAIL: " + label)
func _init() -> void:
	call_deferred("run")
func run() -> void:
	var fx := EffectPlayer.new()
	fx.build({"particles": [{"particle": {"BillboardType": 3, "ColorOperationType": 4}}]})
	var material: Material = fx._emitters[0].material_override
	check(material is ShaderMaterial, "LIE no longer uses camera-facing StandardMaterial")
	if material is ShaderMaterial:
		check(material.get_shader_parameter("billboard_mode") == 4, "horizontal custom billboard selected")
		if DisplayServer.get_name() != "headless":
			await pixels(material)
	fx.free()
	print("effect_lie_test: failures=%d" % failures)
	quit(1 if failures else 0)
func pixels(material: ShaderMaterial) -> void:
	var viewport := SubViewport.new()
	viewport.size = Vector2i(96, 96)
	viewport.own_world_3d = true
	viewport.render_target_update_mode = SubViewport.UPDATE_ALWAYS
	root.add_child(viewport)
	var environment := WorldEnvironment.new()
	environment.environment = Environment.new()
	environment.environment.background_mode = Environment.BG_COLOR
	environment.environment.background_color = Color.BLACK
	viewport.add_child(environment)
	var image := Image.create(2, 2, false, Image.FORMAT_RGBA8)
	image.fill(Color.WHITE)
	material.set_shader_parameter("albedo_texture", ImageTexture.create_from_image(image))
	var mesh := MeshInstance3D.new()
	mesh.mesh = QuadMesh.new()
	mesh.mesh.size = Vector2(1.5, 1.5)
	mesh.material_override = material
	viewport.add_child(mesh)
	var camera := Camera3D.new()
	camera.projection = Camera3D.PROJECTION_ORTHOGONAL
	camera.size = 3
	viewport.add_child(camera)
	for top in [true, false]:
		camera.position = Vector3(0, 3, 0) if top else Vector3(0, 0, 3)
		camera.look_at(Vector3.ZERO, Vector3.FORWARD if top else Vector3.UP)
		await process_frame
		await RenderingServer.frame_post_draw
		var pixels := viewport.get_texture().get_image()
		var lit := 0
		for y in 96:
			for x in 96:
				if pixels.get_pixel(x, y).r > 0.5: lit += 1
		check(lit > 1500 if top else lit < 100, "horizontal quad visibility top=%s pixels=%d" % [top, lit])
	viewport.free()
	await process_frame