extends SceneTree
const MobView = preload("res://ui/mob_view.gd")
var failures := 0
func _init() -> void:
	call_deferred("run")
func run() -> void:
	for mode in ["0", "1"]:
		OS.set_environment("MTGODOT_GPUSKIN", mode)
		for race in [101, 110, 20001]:
			var view := MobView.new()
			if not view.build(AssetRoot.path(), null, race):
				failures += 1
				view.free()
				continue
			root.add_child(view)
			view.anim.set_process(false)
			view.anim.set_time(0.3)
			var signed_area := 0.0
			var total_area := 0.0
			for instance in view.model.find_children("*", "MeshInstance3D", true, false):
				for surface in instance.mesh.get_surface_count():
					var arrays: Array = instance.mesh.surface_get_arrays(surface)
					var vertices: PackedVector3Array = arrays[Mesh.ARRAY_VERTEX]
					var normals: PackedVector3Array = arrays[Mesh.ARRAY_NORMAL]
					var indices: PackedInt32Array = arrays[Mesh.ARRAY_INDEX]
					for i in range(0, indices.size(), 3):
						var a := indices[i]
						var b := indices[i + 1]
						var c := indices[i + 2]
						var cross := (vertices[b] - vertices[a]).cross(vertices[c] - vertices[a])
						signed_area += cross.dot((normals[a] + normals[b] + normals[c]).normalized())
						total_area += cross.length()
			var ratio := signed_area / maxf(total_area, 0.00001)
			print("MOB winding race=%d GPU=%s normal_alignment=%f" % [race, mode, ratio])
			# Godot's outward front face is clockwise; geometric cross is -normal.
			if ratio >= -0.5:
				failures += 1
				printerr("FAIL: NPC/monster faces disagree with outward normals")
			view.free()
			await process_frame
	print("mob_winding_test: failures=%d" % failures)
	quit(1 if failures else 0)