Diff: main.cpp

Revision:

0:3817adfaeb06

Child:

1:618aa2c4ca6a

diff -r 000000000000 -r 3817adfaeb06 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Mar 15 19:09:51 2016 +0000
@@ -0,0 +1,698 @@
+#include "mbed.h"
+#include "SDFileSystem.h"
+#include "wave_player.h"
+#include "enemy.h"
+#include "player.h"
+#include "missile.h"
+#include "globals.h"
+#include "rtos.h"
+#include <string>
+
+/* ==== Navigation Switch ===== */
+class Nav_Switch
+{
+public:
+    Nav_Switch(PinName up,PinName down,PinName left,PinName right,PinName fire);
+    int read();
+//boolean functions to test each switch
+    bool up();
+    bool down();
+    bool left();
+    bool right();
+    bool fire();
+//automatic read on RHS
+    operator int ();
+//index to any switch array style
+    bool operator[](int index) {
+        return _pins[index];
+    };
+private:
+    BusIn _pins;
+ 
+};
+Nav_Switch::Nav_Switch (PinName up,PinName down,PinName left,PinName right,PinName fire):
+    _pins(up, down, left, right, fire)
+{
+    _pins.mode(PullUp); //needed if pullups not on board or a bare nav switch is used - delete otherwise
+    wait(0.001); //delays just a bit for pullups to pull inputs high
+}
+inline bool Nav_Switch::up()
+{
+    return !(_pins[0]);
+}
+inline bool Nav_Switch::down()
+{
+    return !(_pins[1]);
+}
+inline bool Nav_Switch::left()
+{
+    return !(_pins[2]);
+}
+inline bool Nav_Switch::right()
+{
+    return !(_pins[3]);
+}
+inline bool Nav_Switch::fire()
+{
+    return !(_pins[4]);
+}
+inline int Nav_Switch::read()
+{
+    return _pins.read();
+}
+inline Nav_Switch::operator int ()
+{
+    return _pins.read();
+}
+
+// Platform initialization
+uLCD_4DGL uLCD(p28,p27,p29); // LCD (serial tx, serial rx, reset pin;)
+AnalogOut DACout(p18);      // speaker
+wave_player waver(&DACout); // wav player
+SDFileSystem sd(p5, p6, p7, p8, "sd"); // SD card and filesystem (mosi, miso, sck, cs)
+Nav_Switch myNav(p13, p10, p11, p9, p12); //pin order on Sparkfun breakout
+DigitalIn pb(p15); // push button for player misisle fire
+
+// Initialize all global enemy objects
+enemy_t enemy_1;
+enemy_t enemy_2;
+enemy_t enemy_3;
+enemy_t enemy_4;
+enemy_t enemy_5;
+enemy_t enemy_6;
+enemy_t enemy_7;
+enemy_t enemy_8;
+enemy_t enemy_9;
+enemy_t enemy_10;
+enemy_t enemy_11;
+enemy_t enemy_12;
+enemy_t enemy_13;
+enemy_t enemy_14;
+enemy_t enemy_15;
+
+// Initialize variables
+int numOfEnemies = 0;
+int ENEMY_MOVE = 1; 
+int MOVE_DOWN = 0;
+int DIRECTION = 1;
+int firing_col = 0;
+int hit_player = 0;
+bool lose = false;
+int lives = 3;
+bool game_menu = false;
+bool begin_game = false;
+bool gameover = false;
+
+// Initialize global player object
+player_t player;
+
+// Intialize global player and enemy missile
+missile_t missile; // player missile
+missile_t enemy_missile; // enemy missile
+
+// Array of enemy objects
+enemy_t * enemyArray[15];
+
+// Function Prototypes
+void move_enemy_down();
+void playstart(void const *args);
+
+// Draws the enemies at the initial starting location    
+void draw_enemies_level()
+{
+    // Initialize local variables
+    unsigned int start_x_pos = 12;
+    unsigned int start_enemy_y_pos = 20; 
+    numOfEnemies = 15;
+    
+    // First Row of Enemies
+    enemy_init(&enemy_1,start_x_pos,start_enemy_y_pos,WHITE); // initialize x-pos and y-pos and color of enemy
+    enemy_show(&enemy_1); // displays the enemy on uLCD
+    
+    enemy_init(&enemy_2,start_x_pos+15,start_enemy_y_pos,WHITE);
+    enemy_show(&enemy_2);
+    
+    enemy_init(&enemy_3,start_x_pos+30,start_enemy_y_pos,WHITE);
+    enemy_show(&enemy_3);
+    
+    enemy_init(&enemy_4,start_x_pos+45,start_enemy_y_pos,WHITE);
+    enemy_show(&enemy_4);
+    
+    enemy_init(&enemy_5,start_x_pos+60,start_enemy_y_pos,WHITE);
+    enemy_show(&enemy_5);
+    
+    // Second Row of Enemies
+    enemy_init(&enemy_6,start_x_pos,start_enemy_y_pos+12,WHITE);
+    enemy_show(&enemy_6);
+    
+    enemy_init(&enemy_7,start_x_pos+15,start_enemy_y_pos+12,WHITE);
+    enemy_show(&enemy_7);
+    
+    enemy_init(&enemy_8,start_x_pos+30,start_enemy_y_pos+12,WHITE);
+    enemy_show(&enemy_8);
+    
+    enemy_init(&enemy_9,start_x_pos+45,start_enemy_y_pos+12,WHITE);
+    enemy_show(&enemy_9);
+    
+    enemy_init(&enemy_10,start_x_pos+60,start_enemy_y_pos+12,WHITE);
+    enemy_show(&enemy_10);
+    
+    // Third Row of Enemies
+    enemy_init(&enemy_11,start_x_pos,start_enemy_y_pos+24,WHITE);
+    enemy_show(&enemy_11);
+    
+    enemy_init(&enemy_12,start_x_pos+15,start_enemy_y_pos+24,WHITE);
+    enemy_show(&enemy_12);
+    
+    enemy_init(&enemy_13,start_x_pos+30,start_enemy_y_pos+24,WHITE);
+    enemy_show(&enemy_13);
+    
+    enemy_init(&enemy_14,start_x_pos+45,start_enemy_y_pos+24,WHITE);
+    enemy_show(&enemy_14);
+    
+    enemy_init(&enemy_15,start_x_pos+60,start_enemy_y_pos+24,WHITE);
+    enemy_show(&enemy_15);
+    
+    // Put enemy objects into array
+    enemyArray[0] = &enemy_1;
+    enemyArray[1] = &enemy_2;
+    enemyArray[2] = &enemy_3;
+    enemyArray[3] = &enemy_4;
+    enemyArray[4] = &enemy_5;
+    enemyArray[5] = &enemy_6;
+    enemyArray[6] = &enemy_7;
+    enemyArray[7] = &enemy_8;
+    enemyArray[8] = &enemy_9;
+    enemyArray[9] = &enemy_10;
+    enemyArray[10] = &enemy_11;
+    enemyArray[11] = &enemy_12;
+    enemyArray[12] = &enemy_13;
+    enemyArray[13] = &enemy_14;
+    enemyArray[14] = &enemy_15;
+}
+
+// Draws the player at the initial starting location
+void draw_initial_player()
+{
+    int start_x_pos = 59;
+    int start_y_pos = 110;
+    
+    player_init(&player,start_x_pos,start_y_pos,WHITE); // intialize x-pos and y-pos and color of player
+    player_show(&player); // display player on uLCD
+}
+
+// Checks all enemies in row 1
+void check_hit_enemy_row1()
+{
+    int hit_enemy;
+    
+    // First Row of Enemies
+    hit_enemy = check_enemy(&enemy_1, &missile); // checks if the missile hits the enemy and returns 1 if hit, 0 if not hit
+    numOfEnemies = numOfEnemies - hit_enemy; // updates the number of enemies left
+    hit_enemy = check_enemy(&enemy_2, &missile);
+    numOfEnemies = numOfEnemies - hit_enemy;
+    hit_enemy = check_enemy(&enemy_3, &missile);
+    numOfEnemies = numOfEnemies - hit_enemy;
+    hit_enemy = check_enemy(&enemy_4, &missile);
+    numOfEnemies = numOfEnemies - hit_enemy;
+    hit_enemy = check_enemy(&enemy_5, &missile);
+    numOfEnemies = numOfEnemies - hit_enemy;
+}
+
+// Same as check_hit_enemy_row1, but checks enemies at row 2
+void check_hit_enemy_row2()
+{
+    int hit_enemy;
+    
+    // Second Row of Enemies
+    hit_enemy = check_enemy(&enemy_6, &missile);
+    numOfEnemies = numOfEnemies - hit_enemy;
+    hit_enemy = check_enemy(&enemy_7, &missile);
+    numOfEnemies = numOfEnemies - hit_enemy;
+    hit_enemy = check_enemy(&enemy_8, &missile);
+    numOfEnemies = numOfEnemies - hit_enemy;
+    hit_enemy = check_enemy(&enemy_9, &missile);
+    numOfEnemies = numOfEnemies - hit_enemy;
+    hit_enemy = check_enemy(&enemy_10, &missile);
+    numOfEnemies = numOfEnemies - hit_enemy;
+}
+
+// Same as check_hit_enemy_row1, but checks enemies at row 3
+void check_hit_enemy_row3()
+{
+    int hit_enemy;
+
+    // Third Row of Enemies
+    hit_enemy = check_enemy(&enemy_11, &missile);
+    numOfEnemies = numOfEnemies - hit_enemy;
+    hit_enemy = check_enemy(&enemy_12, &missile);
+    numOfEnemies = numOfEnemies - hit_enemy;
+    hit_enemy = check_enemy(&enemy_13, &missile);
+    numOfEnemies = numOfEnemies - hit_enemy;
+    hit_enemy = check_enemy(&enemy_14, &missile);
+    numOfEnemies = numOfEnemies - hit_enemy;
+    hit_enemy = check_enemy(&enemy_15, &missile);
+    numOfEnemies = numOfEnemies - hit_enemy;
+}
+
+// Checks if player is hit
+void check_player_hit()
+{    
+    hit_player = check_player(&player, &enemy_missile); // checks if the missile hits the player and returns 1 if hit, 0 if not hit
+}
+
+// Randomly selects an enemy to fire and updates the position of where the missile will fire from
+void random_attack_gen()
+{
+    firing_col = rand() % 5; // selects a random column
+    
+    // first checks if the 3rd row closest to the player is alive
+    if (enemyArray[firing_col+10]->status == ENEMY_ALIVE)
+    {
+        // If alive, the enemy missile position is updated to the center of the enemy
+        enemy_missile.missile_blk_x = enemyArray[firing_col+10]->enemy_blk_x + (enemyArray[firing_col+10]->enemy_width/2);
+        enemy_missile.missile_blk_y = enemyArray[firing_col+10]->enemy_blk_y + enemyArray[firing_col+10]->enemy_height + 1;
+        enemy_missile.status = ENEMY_MISSILE_ACTIVE; // sets the enemy missile as active
+    }
+    // if enemy at 3rd row is dead, checks the enemy in the 2nd row
+    else if (enemyArray[firing_col+5]->status == ENEMY_ALIVE)
+    {
+        // If alive, the enemy missile position is updated to the center of the enemy
+        enemy_missile.missile_blk_x = enemyArray[firing_col+5]->enemy_blk_x + (enemyArray[firing_col+5]->enemy_width/2);
+        enemy_missile.missile_blk_y = enemyArray[firing_col+5]->enemy_blk_y + enemyArray[firing_col+5]->enemy_height + 1;
+        enemy_missile.status = ENEMY_MISSILE_ACTIVE;
+    }
+    // if enemy at 2nd and 3rd row is dead, checks the enemy in the 1st row
+    else if (enemyArray[firing_col]->status == ENEMY_ALIVE)
+    {
+        // If alive, the enemy missile position is updated to the center of the enemy
+        enemy_missile.missile_blk_x = enemyArray[firing_col]->enemy_blk_x + (enemyArray[firing_col]->enemy_width/2);
+        enemy_missile.missile_blk_y = enemyArray[firing_col]->enemy_blk_y + enemyArray[firing_col]->enemy_height + 1;
+        enemy_missile.status = ENEMY_MISSILE_ACTIVE;
+    }
+}
+
+// moves the enemy
+void enemy_motion()
+{
+    // will move the enemy every 6 loops
+    if (ENEMY_MOVE % 6 == 0)
+    {
+        // FIrst Row of Enemies
+        MOVE_DOWN = move_enemy(&enemy_1, MOVE_DOWN, DIRECTION); // moves the enemy based on the DIRECTION passed in and also sends global MOVE_DOWN to update in enemy.cpp
+        MOVE_DOWN = move_enemy(&enemy_2, MOVE_DOWN, DIRECTION); // MOVE_DOWN will be 1 enemies reach the left or right edge of the screen
+        MOVE_DOWN = move_enemy(&enemy_3, MOVE_DOWN, DIRECTION); // MOVE_DOWN will be 2 if enemies reach the player, otherwise 0
+        MOVE_DOWN = move_enemy(&enemy_4, MOVE_DOWN, DIRECTION);
+        MOVE_DOWN = move_enemy(&enemy_5, MOVE_DOWN, DIRECTION); 
+        
+        // Second Row of Enemies
+        MOVE_DOWN = move_enemy(&enemy_6, MOVE_DOWN, DIRECTION);
+        MOVE_DOWN = move_enemy(&enemy_7, MOVE_DOWN, DIRECTION);
+        MOVE_DOWN = move_enemy(&enemy_8, MOVE_DOWN, DIRECTION);
+        MOVE_DOWN = move_enemy(&enemy_9, MOVE_DOWN, DIRECTION);
+        MOVE_DOWN = move_enemy(&enemy_10, MOVE_DOWN, DIRECTION);
+        
+        // Third Row of Enemies
+        MOVE_DOWN = move_enemy(&enemy_11, MOVE_DOWN, DIRECTION);
+        MOVE_DOWN = move_enemy(&enemy_12, MOVE_DOWN, DIRECTION);
+        MOVE_DOWN = move_enemy(&enemy_13, MOVE_DOWN, DIRECTION);
+        MOVE_DOWN = move_enemy(&enemy_14, MOVE_DOWN, DIRECTION);
+        MOVE_DOWN = move_enemy(&enemy_15, MOVE_DOWN, DIRECTION);
+        
+        // if MOVE_DOWN is 2, then the enemies have reached the player
+        if (MOVE_DOWN == 2)
+        {
+            lose = true; // set global lose to true to go to gameover screen
+        }
+        
+        // if MOVE_DOWN is 1, update the y-pos of the enemies
+        if (MOVE_DOWN == 1)
+        {
+            move_enemy_down(); // updates the y-pos of the enemies
+            
+            // Flips the direction when the enemy moves down
+            if (DIRECTION == 1)
+            {
+                DIRECTION = 2;
+            }
+            else
+            {
+                DIRECTION = 1;
+            }
+            MOVE_DOWN = 0; // sets MOVE_DOWN back to 0 to stop down movement until 
+        }  
+        
+        ENEMY_MOVE += 1;
+    }
+    else
+    {
+        ENEMY_MOVE += 1;
+    }
+}
+
+// moves all the enemies down in the y-direction
+void move_enemy_down()
+{
+    // First Row of Enemies
+    enemy_erase(&enemy_1);
+    enemy_erase(&enemy_2);
+    enemy_erase(&enemy_3);
+    enemy_erase(&enemy_4);
+    enemy_erase(&enemy_5);
+    
+    enemy_1.enemy_blk_y += enemy_1.enemy_height+4;
+    enemy_2.enemy_blk_y += enemy_2.enemy_height+4;
+    enemy_3.enemy_blk_y += enemy_3.enemy_height+4;
+    enemy_4.enemy_blk_y += enemy_4.enemy_height+4;
+    enemy_5.enemy_blk_y += enemy_5.enemy_height+4;
+    
+    // Second Row of Enemies
+    enemy_erase(&enemy_6);
+    enemy_erase(&enemy_7);
+    enemy_erase(&enemy_8);
+    enemy_erase(&enemy_9);
+    enemy_erase(&enemy_10);
+    
+    enemy_6.enemy_blk_y += enemy_6.enemy_height+4;
+    enemy_7.enemy_blk_y += enemy_7.enemy_height+4;
+    enemy_8.enemy_blk_y += enemy_8.enemy_height+4;
+    enemy_9.enemy_blk_y += enemy_9.enemy_height+4;
+    enemy_10.enemy_blk_y += enemy_10.enemy_height+4;
+    
+    // Third Row of Enemies
+    enemy_erase(&enemy_11);
+    enemy_erase(&enemy_12);
+    enemy_erase(&enemy_13);
+    enemy_erase(&enemy_14);
+    enemy_erase(&enemy_15);
+    
+    enemy_11.enemy_blk_y += enemy_11.enemy_height+4;
+    enemy_12.enemy_blk_y += enemy_12.enemy_height+4;
+    enemy_13.enemy_blk_y += enemy_13.enemy_height+4;
+    enemy_14.enemy_blk_y += enemy_14.enemy_height+4;
+    enemy_15.enemy_blk_y += enemy_15.enemy_height+4;
+}
+
+// thread that plays sounds during game
+void playstart(void const *args)//Th
+{   //Depending on the state of the game,
+    //queue either screen music or play sound effect upon fire
+    while(true) {
+        FILE *wave_file;
+        
+        // plays intro music during menu screen
+        while(game_menu)
+        {
+            wave_file=fopen("/sd/wavfiles/spacey_sound.wav","r");
+                
+            waver.play(wave_file);
+            fclose(wave_file);
+        }
+        
+        // Checks in game sound conditions
+        while(begin_game) 
+        {
+            // play firing sound when the player fires
+            if(!pb && missile.status == PLAYER_MISSILE_INACTIVE) {
+ 
+                wave_file=fopen("/sd/wavfiles/4.wav","r");
+ 
+ 
+                waver.play(wave_file);
+                fclose(wave_file);
+            }
+            
+            // if player hit, play hit sound
+            if (hit_player)
+            {
+                wave_file=fopen("/sd/wavfiles/1.wav","r");
+                
+                waver.play(wave_file);
+                fclose(wave_file);
+            }
+        }
+        
+        // players gameover voice if player loses
+        while(gameover)
+        {
+            wave_file=fopen("/sd/wavfiles/game_over.wav","r");
+            
+            waver.play(wave_file);
+            fclose(wave_file);
+        }
+    }
+}
+
+int main() {
+     
+     // Initialization of Setup variables
+     int blk_x, blk_y;
+     pb.mode(PullUp);
+     
+     Thread thread(playstart); // intializes the thread to play sound
+     
+     uLCD.baudrate(500000); // set to 500000 to increase smooth gameplay
+     
+     // Initialization of Game Menu variables
+    const int title_x_pos = 2; // initial x-pos of title
+    const int title_y_pos = 3; // initial y-pos of title
+    int start_label_x_pos = 7; // start label x-pos
+    int start_label_y_pos = 7; // start label y-pos
+    int level_cursor_x_pos = 5; // level cursor x-position
+    int level_cursor_y_pos = 7; // level cursor y-position
+    int gameover_x_pos = 5; // gameover label x-position
+    int gameover_y_pos = 5; // gameover label y-position
+    int win_x_pos = 2; // congratulations label x-position
+    int win_y_pos = 5; // congratulations label y-position
+    int startover_x_pos = 3; // startover label x-position
+    int startover_y_pos = 8; // startover label y-position
+    
+    // intialize temporary score and current score
+    int temp = 0;
+    int score = 0;
+     
+    // Begin game loop
+    while(1)
+    {
+        // initialize all starting conditions for the beginning of the game
+        game_menu = true; // defaults to display menu screen
+        ENEMY_MOVE = true; // defaults to move enemy
+        DIRECTION = 1; // default to move right
+        hit_player = 0; // default to not player hit
+        MOVE_DOWN = 0; // default to not move down
+        lose = false; // default to not lose
+        lives = 3; // defaults to 3 lives
+        score = 0; // default to score of 0
+
+        uLCD.cls();
+        
+        // Implementation of Game Menu
+        while(game_menu) 
+        {
+            uLCD.locate(level_cursor_x_pos,level_cursor_y_pos); // draws cursor next to "START" label
+            uLCD.printf("->");
+            
+            uLCD.locate(title_x_pos,title_y_pos); // "SPACE INVADERS" title position
+            uLCD.printf("SPACE INVADERS"); // Title
+            
+            uLCD.locate(start_label_x_pos,start_label_y_pos); // "START" label position
+            uLCD.printf("START");
+
+            // if pushbutton is pressed, game menu is exited and game begins
+            if(!pb) 
+            { 
+                game_menu = false;
+                wait(0.5);
+            }
+        }
+        
+        begin_game = true; // defaults begin_game to true
+        
+        uLCD.cls();
+
+        // Draw the enemies
+        draw_enemies_level();
+
+        // Draw the player
+        draw_initial_player();
+        
+        // sets the initial position of player missile and enemy missile (later updated)
+        blk_x = player.player_blk_x+(player.player_width/2);
+        blk_y = player.player_blk_y;
+        missile_init(&missile, blk_x, blk_y, WHITE);
+        enemy_missile_init(&enemy_missile, blk_x, blk_y, WHITE);
+        
+        // prints lives
+        uLCD.locate(0,0);
+        uLCD.printf("Lives:%i", lives);
+
+        // prints score
+        uLCD.locate(9,0);
+        uLCD.printf("Score:%i", score);
+        
+        // game play loop
+        while(begin_game) 
+        {
+            // updates score
+            temp = score;
+            score = (15-numOfEnemies)*15;
+            
+            // prints score if score changes
+            if (score != temp)
+            {
+                uLCD.locate(9,0);
+                uLCD.printf("Score:%i", score);
+            }
+            
+            // move enemy
+            enemy_motion();
+
+            // checks if player missile passes y-pos of row1
+            if (missile.missile_blk_y+1-missile.missile_height <= enemy_1.enemy_blk_y
+                    && missile.missile_blk_y+1-missile.missile_height >= enemy_1.enemy_blk_y-enemy_1.enemy_height) 
+            {
+                check_hit_enemy_row1();
+            }
+
+            // checks if player missile passes y-pos of row2
+            if (missile.missile_blk_y+1-missile.missile_height <= enemy_6.enemy_blk_y
+                    && missile.missile_blk_y+1-missile.missile_height >= enemy_6.enemy_blk_y-enemy_6.enemy_height) 
+            {
+                check_hit_enemy_row2();
+            }
+
+            // checks if player missile passes y-pos of row3
+            if (missile.missile_blk_y+1-missile.missile_height <= enemy_11.enemy_blk_y
+                    && missile.missile_blk_y+1-missile.missile_height >= enemy_11.enemy_blk_y-enemy_11.enemy_height) 
+            {
+                check_hit_enemy_row3();
+            }
+            
+            // Random Enemy Fire
+            if (enemy_missile.status == ENEMY_MISSILE_INACTIVE) 
+            {
+                random_attack_gen();
+            }
+            
+            // checks if enemy missile passes y-pos of player
+            if (enemy_missile.missile_blk_y >= player.player_blk_y
+                    && enemy_missile.missile_blk_y <= player.player_blk_y+player.player_height)
+            {
+                check_player_hit();
+            }
+
+            update_missile_pos(&missile); // updates player missile position
+            update_enemy_missile_pos(&enemy_missile); // updates enemy missile position
+
+            // Player Movement checked with navigation switch
+            if (myNav.left() && ((player.player_blk_x-3) > 0)) 
+            {
+                player_erase(&player);
+                player.player_blk_x -= 3;
+                player_show(&player);
+            } 
+            else if (myNav.right() && ((player.player_blk_x+3) < (128-player.player_width))) 
+            {
+                player_erase(&player);
+                player.player_blk_x += 3;
+                player_show(&player);
+            }
+
+            // Player Fire
+            if (pb == 0 && missile.status == PLAYER_MISSILE_INACTIVE) 
+            {
+                missile.missile_blk_x = player.player_blk_x+(player.player_width/2);
+                missile.missile_blk_y = player.player_blk_y;
+                missile.status = PLAYER_MISSILE_ACTIVE;
+            }
+            
+            // checks if player destroyed all enemies
+            if (numOfEnemies == 0)
+            {
+                uLCD.cls();
+                
+                bool win = true; // sets win to true, for win screen
+                begin_game = false;
+                
+                // displays video clip
+                uLCD.cls();
+                uLCD.media_init();
+                uLCD.set_sector_address(0x00, 0x00);
+                uLCD.display_video(0,0);
+                wait(1);
+                
+                uLCD.cls();
+                
+                // prints "Congratulations" on uLCD    
+                uLCD.locate(win_x_pos,win_y_pos);
+                uLCD.printf("CONGRATULATIONS!");
+                
+                // prints "Play Again?" and "Press pb..."
+                uLCD.locate(startover_x_pos, startover_y_pos);
+                uLCD.printf("Play Again?");
+                uLCD.locate(startover_x_pos, startover_y_pos+1);
+                uLCD.printf("Press pb...");
+                
+                // waits at win screen until pushbutton is pressed
+                while (win)
+                {
+                    // if pb is pressed, reset game to start menu
+                    if (!pb)
+                    {
+                        win = false;
+                        wait(0.5);
+                    }
+                }
+                
+            }
+            
+            // checks if player was hit
+            if (hit_player)
+            {
+                // updates lives
+                lives -= 1;
+                wait(0.5);
+                hit_player = 0;
+                player_show(&player);
+                player.status = PLAYER_ALIVE;
+                
+                // prints updated lives number
+                uLCD.locate(0,0);
+                uLCD.printf("Lives:%i", lives);
+            }   
+            
+            // if player loses all lives or enemy reaches the player
+            if (lose || lives == 0)
+            {    
+                begin_game = false; // set to false to end game
+                uLCD.cls();
+                
+                gameover = true; // set to go to display gameover screen
+                
+                // prints "GAMEOVER" to uLCD
+                uLCD.locate(gameover_x_pos, gameover_y_pos);
+                uLCD.printf("GAMEOVER");
+                wait(1);
+                
+                // prints "Play Again?" and "Press pb..."
+                uLCD.locate(startover_x_pos, startover_y_pos);
+                uLCD.printf("Play Again?");
+                uLCD.locate(startover_x_pos, startover_y_pos+1);
+                uLCD.printf("Press pb...");
+                
+                // stays in gameover screen until pb is pressed
+                while (gameover)
+                {
+                    // if pb is pressed, game is reset to the game menu screen
+                    if (!pb)
+                    {
+                        gameover = false;
+                        game_menu = true;
+                        wait(0.5);
+                    }
+                }
+            }
+
+        }
+    }
+}
\ No newline at end of file