From d2e1424e7db231d3ac479763c0120213e543e16c Mon Sep 17 00:00:00 2001
From: Trimutex <gregcraw2001@gmail.com>
Date: Sat, 19 Aug 2023 12:56:40 -0500
Subject: [PATCH] Added bot controls, bot still has poor pathing

---
 src/CMakeLists.txt      |  1 +
 src/botinterface.cpp    | 26 ++++++++++++++++++++++++++
 src/botinterface.hpp    | 12 ++++++++++++
 src/gamestate.cpp       |  8 ++++++--
 src/gamestate.hpp       |  1 +
 src/playerinterface.hpp |  2 +-
 6 files changed, 47 insertions(+), 3 deletions(-)
 create mode 100644 src/botinterface.cpp
 create mode 100644 src/botinterface.hpp

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 04900db..147c92d 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -6,6 +6,7 @@ add_executable(snakeplusplus
     ./snake.cpp
     ./playerinterface.cpp
     ./common.cpp
+    ./botinterface.cpp
 )
 
 target_include_directories(snakeplusplus PUBLIC ${CMAKE_CURRENT_LIST_DIR})
diff --git a/src/botinterface.cpp b/src/botinterface.cpp
new file mode 100644
index 0000000..fe9fc28
--- /dev/null
+++ b/src/botinterface.cpp
@@ -0,0 +1,26 @@
+#include "botinterface.hpp"
+#include "common.hpp"
+#include <SFML/System/Vector2.hpp>
+
+namespace snakeplusplus
+{
+    PlayerDirection lastKnownDirection = kNone;
+    PlayerDirection GetBotInput(sf::Vector2f snakeHeadLocation, sf::Vector2f foodLocation)
+    {
+        sf::Vector2f directionDelta;
+        directionDelta = snakeHeadLocation - foodLocation;
+        if ((directionDelta.y > 0)
+                && (lastKnownDirection != kDown))
+            { lastKnownDirection = kUp; }
+        else if ((directionDelta.y < 0)
+                && (lastKnownDirection != kUp)) 
+            { lastKnownDirection = kDown; }
+        else if ((directionDelta.x > 0)
+                && (lastKnownDirection != kRight)) 
+            { lastKnownDirection = kLeft; }
+        else if ((directionDelta.x < 0)
+                && (lastKnownDirection != kLeft)) 
+            { lastKnownDirection = kRight; }
+        return lastKnownDirection;
+    }
+}
diff --git a/src/botinterface.hpp b/src/botinterface.hpp
new file mode 100644
index 0000000..cd2f14e
--- /dev/null
+++ b/src/botinterface.hpp
@@ -0,0 +1,12 @@
+#ifndef BOTINTERFACE_HPP
+#define BOTINTERFACE_HPP
+
+#include "common.hpp"
+#include <SFML/System/Vector2.hpp>
+
+namespace snakeplusplus
+{
+    PlayerDirection GetBotInput(sf::Vector2f snakeHeadLocation, sf::Vector2f foodLocation);
+}
+
+#endif 
diff --git a/src/gamestate.cpp b/src/gamestate.cpp
index 329c5c0..035cf65 100755
--- a/src/gamestate.cpp
+++ b/src/gamestate.cpp
@@ -1,6 +1,7 @@
 // GameState.cpp
 #include <stdexcept>
 #include <SFML/Graphics.hpp>
+#include "botinterface.hpp"
 #include "common.hpp"
 #include "playerinterface.hpp"
 #include "gamestate.hpp"
@@ -34,7 +35,7 @@ namespace snakeplusplus
     {
         while (graphics.IsOpen())
         {
-            if (isGameOver) {Reset();}
+            if (isGameOver) { Reset(); }
             UpdatePlayerSpeed();
             PlaceNewSnakePart(MovePlayer());
             RegenerateFood();
@@ -113,7 +114,10 @@ namespace snakeplusplus
 
     void GameEngine::UpdatePlayerSpeed(void)
     {
-        switch (GetPlayerInput()) {
+        PlayerDirection controller;
+        if (isBotControlled) { controller = GetBotInput(player.headLocation, playerFood.location); }
+        else { controller = GetPlayerInput(); }
+        switch (controller) { 
             case kUp:
                 if (player.speed.y == 1) { break; }
                 player.speed.x = 0;
diff --git a/src/gamestate.hpp b/src/gamestate.hpp
index 29763a4..baf8b80 100755
--- a/src/gamestate.hpp
+++ b/src/gamestate.hpp
@@ -21,6 +21,7 @@ namespace snakeplusplus
         Snake player;
         Food playerFood;
         bool isGameOver = 0;
+        bool isBotControlled = 1;
         void DisplayEndScreen(void);
         void Loop(void);
         sf::Vector2f MovePlayer(void);
diff --git a/src/playerinterface.hpp b/src/playerinterface.hpp
index 26e12f5..a4de760 100755
--- a/src/playerinterface.hpp
+++ b/src/playerinterface.hpp
@@ -29,7 +29,7 @@ namespace snakeplusplus
         sf::VideoMode gameVideoSettings;
         sf::RectangleShape drawObject;
         bool isWindowAlive;
-        sf::Time delay = sf::milliseconds(60);
+        sf::Time delay = sf::milliseconds(20);
     };
 }