diagrama de classes C++ amilab volume rendering

digraph G {
  size="8"
  node [ shape="box"]

  render [ label="vtkRenderInteractor"];
  vtkvol [ label="vtkVolume"];
  vtkmapper [ label="vtkMapper"];

  vtkproperty1 [ label = "vtkProperty"];
  input1 [ label = "vtkDataSet"];

  vtkgpuvolumemapper [label="vtkGPUVolumeMapper"];
  vtkopenglgpuvolumemapper [ label="vtkOpenGLGPUVolumeMapper"];

  node [ style=filled, fillcolor="#DDDDDD"]
  vtkproperty2 [ label = "vtkProperty"];;
  vtkgpumultivolumemapper [label="vtkGPUMultiVolumeMapper"];
  vtkopenglgpumultivolumemapper [ label="vtkOpenGLGPUMultiVolumeMapper"];


  input2 [ label = "vtkDataSet"];

  // agregacion
  edge [ dir="back" arrowtail="diamond"]
  render -> vtkvol ;
  vtkvol->vtkmapper;
  vtkvol->vtkproperty1;
  vtkmapper->input1;
  vtkgpumultivolumemapper->input2;
  vtkgpumultivolumemapper->vtkproperty2;
  // herencias
  edge [ dir="back" arrowtail="empty"]
  vtkmapper->vtkgpuvolumemapper->vtkopenglgpuvolumemapper ;
  vtkmapper->vtkgpumultivolumemapper->vtkopenglgpumultivolumemapper ;

  rankdir=LR
}