https://discourse.mcneel.com/t/scale-objects-by-volume-centroid/28772 你這個問題外網有人問過，如果是gh的話很簡單， 如果不會gh，只想用rhino的話，那就得借助人家已經寫好的代碼了，Rhino目前還么的這個功能：  ``` import rhinoscriptsyntax as rs import Rhino import scriptcontext as sc def ScaleEach(): factor=2 objrefs = [] if sc.sticky.has_key("SCALEFACTOR"): factor = sc.sticky["SCALEFACTOR"] while True: go = Rhino.Input.Custom.GetObject() go.AcceptNumber(True, False) optFactor = Rhino.Input.Custom.OptionDouble(factor) go.AddOptionDouble("Scale",optFactor) get_rc = go.GetMultiple(1, 0) if go.CommandResult()!=Rhino.Commands.Result.Success: return go.CommandResult() if get_rc==Rhino.Input.GetResult.Object: for n in range(go.ObjectCount): objrefs.append(go.Object(n)) break elif get_rc == Rhino.Input.GetResult.Number: factor = go.Number() sc.sticky["SCALEFACTOR"] = factor elif get_rc==Rhino.Input.GetResult.Option: factor = optFactor.CurrentValue sc.sticky["SCALEFACTOR"] = factor continue factor = sc.sticky["SCALEFACTOR"] if len(objrefs) == 0: return rs.EnableRedraw(False) for objref in objrefs: Id = objref.ObjectId obj = sc.doc.Objects.Find(Id) bbCen = obj.Geometry.GetBoundingBox(True).Center rs.ScaleObject(Id,bbCen,[factor, factor, factor],False) rs.EnableRedraw(True) ScaleEach() ```