关于层的操作

fn clear_layer =
(
    all_obj = #()
    layer_names = #()
    for i = 0 to layerManager.count-1 do
    (
        ilayer = layerManager.getLayer i
        ilayer.nodes &all_nodes
        join all_obj all_nodes
        append layer_names (ilayer.name as string)
    )--收集所有组内的节点到all_obj,组名称到layer_names
    layer_0 = layerManager.getLayer 0
    for o in all_obj do (layer_0.addNode o)--将所有节点移动到0层
    layer_0.current = true --激活图层
    layer_0.ishidden = false --隐藏图层
    layer_0.isfrozen = false --冻结图层
    if layer_names.count > 1 do
    (
        for d in layer_names do LayerManager.deleteLayerByName d
    )--如果层数大于1则删除所有层
)