av->id_ik_foot_l = skeleton_bone_id( sk, "foot.IK.L" );
av->id_ik_foot_r = skeleton_bone_id( sk, "foot.IK.R" );
av->id_board = skeleton_bone_id( sk, "board" );
av->id_ik_foot_l = skeleton_bone_id( sk, "foot.IK.L" );
av->id_ik_foot_r = skeleton_bone_id( sk, "foot.IK.R" );
av->id_board = skeleton_bone_id( sk, "board" );