diagram of classes for amilab volumerendering script

digraph {
  size=8
  node [ shape="box"]
  // nodes
  VolRenClass
  vtkAmiVolRen
  vtkVolumeClass
  vtkCameraClass
  PreviewerClass
  ImageHistogramClass
  dwCurveIOClass
  vtkCurveClass
  SimpleVTKVolumeClass

  // agregacion
  edge [ dir="back" arrowtail="diamond"]
  // edges
  VolRenClass -> vtkAmiVolRen [ headlabel="0..1" taillabel="1"]
  VolRenClass -> vtkCameraClass
  VolRenClass -> PreviewerClass
  VolRenClass -> SimpleVTKVolumeClass [ headlabel="1..*" taillabel="1"]
  PreviewerClass -> SimpleVTKVolumeClass [ headlabel="1..*" taillabel="1"]
  rank=same vtkAmiVolRen vtkVolumeClass vtkCameraClass PreviewerClass

  //
  vtkVolumeClass -> ImageHistogramClass
  vtkVolumeClass -> dwCurveIOClass
  vtkVolumeClass -> vtkCurveClass
  rank=same ImageHistogramClass dwCurveIOClass vtkCurveClass
  // herencias
  edge [ dir="back" arrowtail="empty"]
  SimpleVTKVolumeClass -> vtkVolumeClass

  rankdir=LR
}