From e6797fa193c63983c98dca8fcf04459cf10de25a Mon Sep 17 00:00:00 2001
From: Trianta <56975502+Trimutex@users.noreply.github.com>
Date: Fri, 13 Oct 2023 19:22:11 -0500
Subject: [PATCH] Split into BFS at first and DFS after
---
src/botinterface.cpp | 83 +++++++++++++++++++++++++++++++++++---------
src/botinterface.hpp | 6 +++-
src/gamestate.cpp | 2 +-
3 files changed, 72 insertions(+), 19 deletions(-)
diff --git a/src/botinterface.cpp b/src/botinterface.cpp
index ff38e6c..6545e41 100755
--- a/src/botinterface.cpp
+++ b/src/botinterface.cpp
@@ -38,25 +38,42 @@ namespace snakeplusplus
// Gets a new path for the bot to follow
// Uses DFS algorithm
- void AISnake::GetNewPath(const std::vector< std::vector<char> >& gameBoard, const sf::Vector2f& source, const sf::Vector2f& boundaries)
+ void AISnake::GetNewPath(const std::vector< std::vector<char> >& gameBoard, const sf::Vector2f& source, const sf::Vector2f& boundaries, const int snakeSize)
{
+ // Search for food
+ if (snakeSize < 160) {
+ BFS(gameBoard, source, boundaries);
+ } else {
+ DFS(gameBoard, source, boundaries);
+ }
+ // Create path for food
+ path.push(botPathUnsanitized.top());
+ botPathUnsanitized.pop();
+ while (!botPathUnsanitized.empty()) {
+ sf::Vector2f deltaVector = botPathUnsanitized.top() - path.top();
+ int delta = abs(deltaVector.x) + abs(deltaVector.y);
+ if (delta == 1) {
+ path.push(botPathUnsanitized.top());
+ }
+ botPathUnsanitized.pop();
+ }
+ }
+
+ void AISnake::BFS(const std::vector< std::vector<char> >& gameBoard, const sf::Vector2f& source, const sf::Vector2f& boundaries) {
std::queue<sf::Vector2f> search;
- std::stack<sf::Vector2f> botPathUnsanitized;
std::vector<std::vector<bool>> visited(boundaries.y, std::vector<bool> (boundaries.x, false));
- sf::Vector2f currentLocation;
- std::array<sf::Vector2f, 4> localLocations;
bool foodFound = false;
search.push(source);
- // Search for food
while (!search.empty()) {
- currentLocation = search.front();
+ sf::Vector2f currentLocation = search.front();
search.pop();
if (foodFound) { break; }
if (visited.at(currentLocation.y).at(currentLocation.x)) { continue; }
- botPathUnsanitized.push(currentLocation);
if (gameBoard.at(currentLocation.y).at(currentLocation.x) == 'X') {
foodFound = true;
}
+ botPathUnsanitized.push(currentLocation);
+ std::array<sf::Vector2f, 4> localLocations;
localLocations.fill(currentLocation);
localLocations[0].y += 1;
localLocations[1].x += 1;
@@ -84,17 +101,49 @@ namespace snakeplusplus
}
visited.at(currentLocation.y).at(currentLocation.x) = true;
}
- // Create path for food
- path.push(botPathUnsanitized.top());
- botPathUnsanitized.pop();
- while (!botPathUnsanitized.empty()) {
- currentLocation = botPathUnsanitized.top();
- sf::Vector2f deltaVector = currentLocation - path.top();
- int delta = abs(deltaVector.x) + abs(deltaVector.y);
- if (delta == 1) {
- path.push(botPathUnsanitized.top());
+ }
+
+ void AISnake::DFS(const std::vector< std::vector<char> >& gameBoard, const sf::Vector2f& source, const sf::Vector2f& boundaries) {
+ std::stack<sf::Vector2f> search;
+ std::vector<std::vector<bool>> visited(boundaries.y, std::vector<bool> (boundaries.x, false));
+ bool foodFound = false;
+ search.push(source);
+ while (!search.empty()) {
+ sf::Vector2f currentLocation = search.top();
+ search.pop();
+ if (foodFound) { break; }
+ if (visited.at(currentLocation.y).at(currentLocation.x)) { continue; }
+ if (gameBoard.at(currentLocation.y).at(currentLocation.x) == 'X') {
+ foodFound = true;
}
- botPathUnsanitized.pop();
+ botPathUnsanitized.push(currentLocation);
+ std::array<sf::Vector2f, 4> localLocations;
+ localLocations.fill(currentLocation);
+ localLocations[0].y += 1;
+ localLocations[1].x += 1;
+ localLocations[2].y -= 1;
+ localLocations[3].x -= 1;
+ for (auto i : localLocations) {
+ try {
+ if (gameBoard.at(i.y).at(i.x) == 'X') {
+ botPathUnsanitized.push(i);
+ foodFound = true;
+ }
+ } catch (const std::out_of_range& error) {
+ continue; // Out of bounds
+ }
+ }
+ for (sf::Vector2f newLocation : localLocations) {
+ try {
+ if ((!visited.at(newLocation.y).at(newLocation.x))
+ && (gameBoard.at(newLocation.y).at(newLocation.x) == ' ')) {
+ search.push(newLocation);
+ }
+ } catch (const std::out_of_range& error) {
+ continue; // Out of bounds
+ }
+ }
+ visited.at(currentLocation.y).at(currentLocation.x) = true;
}
}
}
diff --git a/src/botinterface.hpp b/src/botinterface.hpp
index 152cbb2..5664235 100755
--- a/src/botinterface.hpp
+++ b/src/botinterface.hpp
@@ -12,8 +12,12 @@ namespace snakeplusplus
public:
std::stack<sf::Vector2f> path;
AISnake();
- void GetNewPath(const std::vector< std::vector<char> >& gameBoard, const sf::Vector2f& source, const sf::Vector2f& boundaries);
+ void GetNewPath(const std::vector< std::vector<char> >& gameBoard, const sf::Vector2f& source, const sf::Vector2f& boundaries, const int snakeSize);
PlayerDirection GetInput(const sf::Vector2f* source);
+ private:
+ std::stack<sf::Vector2f> botPathUnsanitized;
+ void BFS(const std::vector< std::vector<char> >& gameBoard, const sf::Vector2f& source, const sf::Vector2f& boundaries);
+ void DFS(const std::vector< std::vector<char> >& gameBoard, const sf::Vector2f& source, const sf::Vector2f& boundaries);
};
}
diff --git a/src/gamestate.cpp b/src/gamestate.cpp
index 95b069f..5e37107 100755
--- a/src/gamestate.cpp
+++ b/src/gamestate.cpp
@@ -121,7 +121,7 @@ namespace snakeplusplus
PlayerDirection controller;
if (isBotControlled) {
if (bot.path.empty()) {
- bot.GetNewPath(gameBoard, player.headLocation, GetGameBoundaries());
+ bot.GetNewPath(gameBoard, player.headLocation, GetGameBoundaries(), player.body.size());
}
controller = bot.GetInput(&player.headLocation);
}