TrackingBone3D_head.gd

   1 @tool
   2
   3 class_name TrackingBone3D_head
   4 extends SkeletonModifier3D
   5
   6 @export_enum(" ") var bone: String
   7 @export var target: Vector3 = Vector3(0, 0, 0)
   8
   9
  10 func _validate_property(property: Dictionary) -> void:
  11         if property.name == "bone":
  12                 var skeleton: Skeleton3D = get_skeleton()
  13                 if skeleton:
  14                         property.hint = PROPERTY_HINT_ENUM
  15                         property.hint_string = skeleton.get_concatenated_bone_names()
  16
  17
  18 func _process_modification() -> void:
  19         var skeleton: Skeleton3D = get_skeleton()
  20         if !skeleton:
  21                 return # Never happen, but for the safety.
  22         var bone_idx: int = skeleton.find_bone(bone)
  23         var _parent_idx: int = skeleton.get_bone_parent(bone_idx)
  24         var pose: Transform3D = skeleton.global_transform * skeleton.get_bone_global_pose(bone_idx)
  25
  26         #var looked_at: Transform3D = _w_look_at(pose, target)
  27         var looked_at: Transform3D = pose.looking_at(target, Vector3.UP)
  28         var axis: Vector3 = looked_at.basis.y
  29         looked_at = looked_at.rotated(axis, PI)
  30
  31         skeleton.set_bone_global_pose(
  32                 bone_idx,
  33                 Transform3D(
  34                         (skeleton.global_transform.affine_inverse() * looked_at).basis.orthonormalized(),
  35                         skeleton.get_bone_global_pose(bone_idx).origin
  36                         )
  37                 )