bsp.nim

type
  NodeKind = enum
    HSplit, VSplit, Leaf
  BSPNode[T] = ref object
    parent: BSPNode
    case kind: NodeKind
    of HSplit:
      hPos: float
      left: BSPNode
      right: BSPNode
    of VSplit:
      vPos: float
      top: BSPNode
      bottom: BSP
    of Leaf
      content: T