digraph G {
  subgraph clusterNotcurses {
    label = "Notcurses context (one per terminal)"
    style = filled;
    color = lightgrey;
    subgraph clusterPile0 {
      //label="Piles represent distinct collections of planes. The main pile is rendered by old notcurses_render().\nncpile_render() and ncpile_rasterize() (version 2.1) work with different piles."
      label="The standard pile contains the standard plane."
      style=filled;
      color="deepskyblue:darkslategray1";
      planeS [ label="{{Standard plane}|{Cellmatrix}|{EGCPool}}" shape=record style=filled ]
      plane1 [ label="{{Plane 1}|{Cellmatrix}|{EGCPool}}" shape=record style=filled ]
    }
    subgraph clusterPile1 {
      label="Pile 1"
      style=filled;
      color="cadetblue:purple";
      plane2 [ label="{{Plane 2}|{Cellmatrix}|{EGCPool}}" shape=record style=filled ]
      plane3 [ label="{{Plane 3}|{Cellmatrix}|{EGCPool}}" shape=record style=filled ]
      plane4 [ label="{{Plane 4}|{Cellmatrix}|{EGCPool}}" shape=record style=filled ]
    }
    subgraph clusterPile2 {
      label="Pile 2"
      style=filled;
      color="cadetblue:purple";
      plane5 [ label="{{Plane 5}|{Cellmatrix}|{EGCPool}}" shape=record style=filled ]
      plane6 [ label="{{Plane 6}|{Cellmatrix}|{EGCPool}}" shape=record style=filled ]
    }
    subgraph clusterRaster {
      label="Rendering solves for the current frame. This\nframe is compared to the current state.\nDifferent cells are written to the terminal,\nand the current state is updated."
      style="filled"
      color="darkgreen:forestgreen"
      cMatrix0 [ label="{{Cellmatrix}|{EGCPool}}" shape=record style=filled ]
      Rasterization [ shape=oval label="Rasterization" style=filled color=yellow ]
      RenderArea [ shape=rectangle label="Render area\n(via FILE*)" style=filled color=yellow ]
      Rasterization -> cMatrix0
      Rasterization -> RenderArea
      labelloc="b";
    }
    plane1 -> Rasterization [ltail=clusterPile0]
    plane4 -> Rasterization [ltail=clusterPile1]
    plane5 -> Rasterization [ltail=clusterPile2]
      //label="The planes of a pile are related two ways:\n1. Totally ordered along the pile's z-axis.\n2. Via a rooted n-ary tree of binding."
      //label="A rectangular array of Cells, with one Cell per coordinate of the associated plane, backs each plane.\nThis is the plane's cell matrix. An EGCPool backs each cell matrix; they contain nul-terminated\nUTF8-encoded Extended Grapheme Clusters of arbitrary length."
  }
}