private SMBMemoryMapper.PlayerStats GetPlayerStats(SMBMemoryMapper mapper)
{
SMBMemoryMapper.PlayerStats playerStats = (SMBMemoryMapper.PlayerStats)mapper.FetchPlayerStats();
return(playerStats);
}
/// <summary>
/// Evaluate the provided IBlackBox against the SMB Neat player and return its fitness score.
/// </summary>
public FitnessInfo Evaluate(IBlackBox box)
{
// How many frames the NN should wait before making another move (Game runs at 60 frames/second)
int playerSpeed = 2;
// The amount of seconds that can pass with Mario not making progress in Seconds
int idleTime = 3;
idleTime = idleTime * (60 / playerSpeed);
// Create a fresh clone of the state
Emulator emu = LoadState(_stateFile);
// Create a new controller for the Emulator
emu.Controller = new NES001Controller();
// Create a new SMB Mapper object for easy access to the NN inputs.
SMBMemoryMapper mapper = new SMBMemoryMapper(ref emu);
// Create a new Neat Player
SMBNeatPlayer neatPlayer = new SMBNeatPlayer(box, ref emu.Controller);
// Until Mario becomes stuck or dies feed each input frame into the neural network and make a move!
int levelX = GetPlayerStats(mapper).PlayerX;
while (GetGameStats(mapper).Lives >= 2 && idleTime >= 0)
{
for (int i = 1; i <= 60; i++)
{
// Process 1 frame of the game
emu.PPU.ProcessFrame();
if (i % playerSpeed == 0)
{
// Refresh the memory mapper
mapper.Refresh();
int currLevelX = GetPlayerStats(mapper).PlayerX;
// Evaluate inputs and make a moves
neatPlayer.MakeMove(mapper.FetchInputs());
// Check whether Mario is advancing
if (levelX >= currLevelX)
{
idleTime--;
}
// Update marios X progress
levelX = currLevelX;
//Console.WriteLine("levelX: " + levelX);
}
}
// Refresh the memory mapper before evalutating while loop
mapper.Refresh();
}
// Assign fitness eval vars
int X = GetPlayerStats(mapper).PlayerX;
int S = GetGameStats(mapper).Score;
int T = GetGameStats(mapper).Time;
double fitness = 0;
// Update eval count ?? what is this even doing?
_evalCount++;
// Get the fitness score of the run
fitness = CalculateFinalFitness(X, S, T);
Console.WriteLine("X: " + X + "\t S: " + S + "\t T: " + T + "\t fitness: " + fitness);
// Return the fitness score
return(new FitnessInfo(fitness, fitness));
}
private SMBMemoryMapper.GameStats GetGameStats(SMBMemoryMapper mapper)
{
SMBMemoryMapper.GameStats gameStats = (SMBMemoryMapper.GameStats)mapper.FetchGameStats();
return(gameStats);
}