process.dot

digraph texas_snake_graph {

  subgraph cluster_0 {
    style=filled;
    color=antiquewhite;
    node [style=filled,color=white];
    "Spawn border set buttons" -> "Wait for user choice" -> "Wait for user choice" -> "Remove buttons"
    label = "Initialized state";
    "Wait for user choice" [shape=box]
  }

  subgraph cluster_1 {
      style=filled;
      color=antiquewhite1;
      node [style=filled,color=white];
      "Spawn borders" ->  "Spawn snake" -> "Spawn first bonus" -> "Wait for first user input" -> "Wait for first user input"
      "Wait for first user input" [shape=box]
      label = "Ready state"
  }
  
  subgraph cluster_2 {
      style=filled;
      color=antiquewhite2;
      node [style=filled,color=white];
      "Compute borders visibility" 
      -> "Check for collisions" 
      -> "Lookup for snake direction change on user kbd" 
      ->  "Check if a pause has been requested"
      -> a0;
      a0 -> "Timeout system if an extra bonus is present" [label="If no pause requested"];
      "Timeout system if an extra bonus is present"
      -> "Move the snake"
      -> "Move its queue"
      -> "Collision event handler listener"
      -> a1;
      a1 -> "Check for collisions" [label="If no border collision registered"];
      a1 -> "Delete all playable entities" [label="If a border collision has been registered"];
      a1 -> "Increase score" [label="A bonus has been collided"];
      "Increase score" -> "Size up queue" -> "Spawn randomly a new bonus, and possibly an extra bonus"
      "Spawn randomly a new bonus, and possibly an extra bonus" -> "Check for collisions"
      "Delete all playable entities" -> "Reset score";
      a0, a1 [label="", shape="diamond"]
      "Check if a pause has been requested" [shape=box]
      "Lookup for snake direction change on user kbd" [shape=box]
      label= "Running state"
  }
  
  subgraph cluster_3 {
      style=filled;
      color=antiquewhite3;
      node [style=filled,color=white];
      label= "Paused state"
      "Check if resume has been requested"  -> "Check if resume has been requested"
       "Check if resume has been requested"  [shape=box]
  }
  
  subgraph cluster_4 {
      style=filled;
      color=antiquewhite4;
      node [style=filled,color=white];
      "Wait for user input" -> "Wait for user input" -> b0;
      "Wait for user input"  [shape=box]
      b0 [label="", shape="diamond"]
      label = "Over state"
  }

  start -> "Init plugins" -> "Init resources" -> "Launch setup" -> "Load assets" -> "Resize the window" -> "Add the update text system" -> "Spawn border set buttons";
  "Remove buttons" -> "Spawn borders"
  "Wait for first user input" -> "Compute borders visibility"
  a0 -> "Check if resume has been requested";
  b0 -> "Spawn borders" [label="Game restart requested"];
  b0 -> "Spawn border set buttons" [label="App restart requested"];
  "Reset score" -> "Wait for user input"
  "Check if resume has been requested" -> "Compute borders visibility";
    
  start [shape=Mdiamond];
}