Implement playable Mac client and rendering validation

project/fx/motion_effect_anchor.gd

@@ -0,0 +1,40 @@
+# 40250 ActorInstanceMotionEvent / ActorInstanceAttach: bone * offset * actor
+# in row-vector order. The Godot equivalent is actor * offset * bone.
+extends Node
+
+const SOURCE_TO_METRES := Transform3D(Basis(Vector3(0.01, 0, 0), Vector3(0, 0, -0.01), Vector3(0, 0.01, 0)), Vector3.ZERO)
+var model: Node3D
+var animator: Node
+var event := {}
+
+func configure(view: Node3D, data: Dictionary) -> bool:
+	model = view.get("model")
+	animator = view.get("anim")
+	event = data.duplicate()
+	# Sample immediately, then after animation (default priority 0) every frame.
+	process_priority = 100
+	if not update_anchor():
+		return false
+	var attached := bool(event.get("attaching", false))
+	set_process(not bool(event.get("independent", false)) and
+		(not attached or bool(event.get("following", false))))
+	return true
+
+func update_anchor() -> bool:
+	if not is_instance_valid(model) or not model.is_inside_tree():
+		return false
+	var bone := Transform3D.IDENTITY
+	if bool(event.get("attaching", false)) and not bool(event.get("independent", false)):
+		if not is_instance_valid(animator):
+			return false
+		var pose: Dictionary = animator.get_effect_bone_pose(String(event.get("bone", "")))
+		if pose.is_empty():
+			return false # No silent substitution of the actor origin for a missing bone.
+		bone = pose.transform
+	var offset := Transform3D(Basis.IDENTITY, event.get("pos", Vector3.ZERO))
+	get_parent().global_transform = model.global_transform * offset * bone * SOURCE_TO_METRES.affine_inverse()
+	return true
+
+func _process(_delta: float) -> void:
+	if not update_anchor():
+		get_parent().queue_free()