From 87ef7e90829053b7bc336f7316c3facb6c51e781 Mon Sep 17 00:00:00 2001
From: Justin Worthe <justin.worthe@gmail.com>
Date: Sun, 2 Aug 2015 19:01:01 +0200
Subject: Reading brain in from a file

---
 src/brain/neural_network.cpp | 19 +++++++++++++++++++
 src/game_state.cpp           | 43 ++++++++++++++++++++++++++++++++++++++++++-
 src/spacebot.cpp             | 13 ++++---------
 3 files changed, 65 insertions(+), 10 deletions(-)

(limited to 'src')

diff --git a/src/brain/neural_network.cpp b/src/brain/neural_network.cpp
index 15eedca..30da46c 100644
--- a/src/brain/neural_network.cpp
+++ b/src/brain/neural_network.cpp
@@ -17,6 +17,24 @@ NeuralNetwork::NeuralNetwork(std::istream &&networkConfigFile, int numberOfSenso
     parseFile(std::move(networkConfigFile));
 }
 
+NeuralNetwork::NeuralNetwork(std::istream &&networkConfigFile, std::vector<bool> sensorInitialValues, int numberOfOutputs)
+{
+    _biasNode = std::make_shared<BiasNode>();
+    
+    for (int i=0; i<sensorInitialValues.size(); ++i)
+    {
+	auto sensor = std::make_shared<Sensor>(i);
+	sensor->setActivation(sensorInitialValues.at(i) ? 1 : 0);
+	_sensors.push_back(sensor);
+    }
+    for (int i=0; i<numberOfOutputs; ++i)
+    {
+	_outputs.push_back(std::make_shared<Neuron>(i));
+    }
+
+    parseFile(std::move(networkConfigFile));
+}
+
 void NeuralNetwork::parseFile(std::istream &&file)
 {
     double weight;
@@ -123,6 +141,7 @@ void NeuralNetwork::setInput(int inputIndex, double activation)
 	if (sensor->id() == inputIndex)
 	{
 	    sensor->setActivation(activation);
+	    break;
 	}
     }
 }
diff --git a/src/game_state.cpp b/src/game_state.cpp
index 5fed683..e6deae7 100644
--- a/src/game_state.cpp
+++ b/src/game_state.cpp
@@ -2,9 +2,11 @@
 #include <iostream>
 #include <fstream>
 #include <limits>
+#include <bitset>
 
 const int OPENING_LINES = 6;
 const int GAME_AREA_LINES = 25;
+const int GAME_WIDTH = 19;
 
 void moveToNextChar(int &x, int &y, int &width, char &nextChar, std::istream &mapFile)
 {
@@ -91,5 +93,44 @@ void GameState::logState()
 
 std::vector<bool> GameState::toBitArray() const
 {
-    return std::vector<bool>();
+    std::vector<bool> result;
+
+    std::vector<bool> alienNodes((GAME_AREA_LINES-2) * (GAME_WIDTH-2), false);
+    for (auto alien : _aliens)
+    {
+	alienNodes.at((alien.y()-1)*(GAME_WIDTH-2)+(alien.x()-1)) = true;
+    }
+    result.insert(result.end(), alienNodes.begin(), alienNodes.end());
+
+    std::vector<bool> bulletNodes((GAME_AREA_LINES-2) * (GAME_WIDTH-2), false);
+    for (auto bullet : _bullets)
+    {
+	bulletNodes.at((bullet.y()-1)*(GAME_WIDTH-2)+(bullet.x()-1)) = true;
+    }
+    result.insert(result.end(), bulletNodes.begin(), bulletNodes.end());
+
+    std::vector<bool> missileNodes((GAME_AREA_LINES-2) * (GAME_WIDTH-2), false);
+    for (auto missile : _missiles)
+    {
+	missileNodes.at((missile.y()-1)*(GAME_WIDTH-2)+(missile.x()-1)) = true;
+    }
+    result.insert(result.end(), missileNodes.begin(), missileNodes.end());
+
+    std::vector<bool> shieldNodes(2 * (GAME_WIDTH-2), false);
+    for (auto shield : _shields)
+    {
+	int row = shield.y() > GAME_AREA_LINES/2 ? 1 : 0;
+	shieldNodes.at(row*(GAME_WIDTH-2)+(shield.x()-1)) = true;
+    }
+
+    for (auto spaceship : _spaceships)
+    {
+	std::bitset<5> spaceshipBits(spaceship.x());
+	for (int i=0; i<spaceshipBits.size(); ++i)
+	{
+	    result.push_back(spaceshipBits[i]);
+	}
+    }
+    
+    return result;
 }
diff --git a/src/spacebot.cpp b/src/spacebot.cpp
index 1f8f2b8..418756c 100644
--- a/src/spacebot.cpp
+++ b/src/spacebot.cpp
@@ -3,9 +3,9 @@
 #include "brain/neural_network.h"
 #include <fstream>
 
-Spacebot::Spacebot(std::string outputPath)
+Spacebot::Spacebot(std::string outputPath, std::string brainFilename)
     : _outputFilename(outputPath+"/move.txt"),
-      _networkConfigFilename("brain.nn"),
+      _brainFilename(brainFilename),
       _gameState(std::ifstream(outputPath+"/map.txt"))
 {
 }
@@ -20,15 +20,10 @@ Move Spacebot::chooseMove()
 {
     auto sensorInputs = _gameState.toBitArray();
     
-    NeuralNetwork network(std::ifstream(_networkConfigFilename),
-			  sensorInputs.size(),
+    NeuralNetwork network(std::ifstream(_brainFilename),
+			  sensorInputs,
 			  static_cast<int>(Move::BUILD_SHIELD));
 
-    for (int i=0; i<sensorInputs.size(); ++i)
-    {
-	network.setInput(i, sensorInputs[i] ? 1 : 0);
-    }
-
     int moveInt = network.findMaxOutputIndex();
     return static_cast<Move>(moveInt);
 }
-- 
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