Blackvoxel > General Discussion

Saving variables

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Yves:
Hello,
This is an old topic, but I thought new players of the game may be interested in some feedback, because the language documentation is very sparse about saving and retrieving variables when quitting and resuming the game.

By trial and error, here is how I ended up saving and restoring my programmable robot:


--- Code: ---// This function is called when robot is loaded from save file or when created

function Voxel_Load()
{
  local name = Get_Save_Filename();
  print("read state file = " + name + "\r\n");
  try
  {
    local save = dofile(name);
    InitDir      = save.InitDir;
    State        = save.State;
    StartX       = save.StartX;
    StartY       = save.StartY;
    StartZ       = save.StartZ;
    CenterX      = save.CenterX;
    CenterZ      = save.CenterZ;
    StepX        = save.StepX;
    StepZ        = save.StepZ;
    StepXBeforeZ = save.StepXBeforeZ;
    FlatSteps    = save.FlatSteps;
    Dir          = save.Dir;
    Depth        = save.Depth;
    Quarter      = save.Quarter;
    CellCount    = save.CellCount;
    RowCount     = save.RowCount;
    StartStock   = save.StartStock;
    UnloadType   = save.UnloadType;
    UnloadXYZ    = save.UnloadXYZ;
  }
  catch (e)
  {
    print("Could not read state file for robot " + GetRobotID() + "\r\n  " + e + "\r\n");
  }
  if ( GetInfo(23) == 0 || GetInfo(23) == 4 )
  {
    print("Robot " + GetRobotID() + " set to initial state.\r\n");
    State = ST_INIT;
  }
  else
  {
    print("Robot " + GetRobotID() + " restored.\r\n");
  }
}

// This function is called when robot is unloaded to save file or when destroyed

function Voxel_Unload()
{
  local name = Get_Save_Filename();
  local save = file(name, "w");
  local slot, xyz, data;
  local code = "return {\n";
  code += "  InitDir      = " + InitDir + ",\n";
  code += "  State        = " + State + ",\n";
  code += "  StartX       = " + StartX + ",\n";
  code += "  StartY       = " + StartY + ",\n";
  code += "  StartZ       = " + StartZ + ",\n";
  code += "  CenterX      = " + CenterX + ",\n";
  code += "  CenterZ      = " + CenterZ + ",\n";
  code += "  StepX        = " + StepX + ",\n";
  code += "  StepZ        = " + StepZ + ",\n";
  code += "  StepXBeforeZ = " + (StepXBeforeZ ? "true" : "false") + ",\n";
  code += "  FlatSteps    = " + FlatSteps + ",\n";
  code += "  Dir          = " + Dir + ",\n";
  code += "  Depth        = " + Depth + ",\n";
  code += "  Quarter      = " + Quarter + ",\n";
  code += "  CellCount    = " + CellCount + ",\n";
  code += "  RowCount     = " + RowCount + ",\n";
  code += "  StartStock   = " + StartStock + ",\n";
  code += "  UnloadType   = " + UnloadType + ",\n";
  code += "  UnloadXYZ    = {\n";
  foreach ( slot, xyz in UnloadXYZ )
  {
    code += ("    [" + slot + "] = [" + xyz[0] + ", " + xyz[1] + ", " + xyz[2] + "],\n");
  }
  code += "  }\n}\n";
  data = blob(code.len());
  foreach ( slot in code )
  {
    data.writen(slot, 'b');
  }
  save.writeblob(data);
  save.close();
  print("Robot " + GetRobotID() + " saved.\r\n");
}

function Get_Save_Filename()
{
  local saves = GetPath(4);
  local sep = GetInfo(20);
  local nut = GetInfo(22);
  local robot = GetRobotID();
  return saves + sep + nut + "_" + robot + ".state";
}

--- End code ---

Of course, this code is tailor-made for my robot’s variables, but you get the idea :-)

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