Kaba struct Bone ed

struct Bone extends SingleData
    var const_pos: bool
    var is_selected: bool
    var is_special: bool
    var m_delta: bool
    var m_old: bool
    var matrix: mat4
    var model: Model*
    var model_file: string
    var parent: i32
    var pos: vec3
    var view_stage: i32

    # constructors
    func mut __init__()

    # operators
    func mut __assign__(other: Bone)     # Bone = Bone