Kaba struct Terrain ed

struct Terrain extends SingleData
    var changed: bool
    var filename: Path
    var is_selected: bool
    var is_special: bool
    var m_delta: bool
    var m_old: bool
    var pos: vec3
    var show_texture: i32
    var terrain: Terrain*
    var vertex_buffer_single: i32
    var view_stage: i32

    # constructors
    func mut __init__()

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