Diff: Game/Game.cpp

Revision:

7:8d381315f72c

Parent:

6:a2c72def99f9

--- a/Game/Game.cpp	Tue May 26 18:14:03 2020 +0000
+++ b/Game/Game.cpp	Tue May 26 22:53:42 2020 +0000
@@ -4,37 +4,47 @@
 #include "N5110.h"
 #include "Menu.h"
 
-/**Constructor*/
+//initialise the game
 Game::Game()
 {
-    x = 4;
-    y = 4;
-    for (int i = 0; i < 16; i++) {      //this creates the possible x coordinates the fruit can have
-        fruitX[i] = 3 + i*5;            //in order to be always alligned with the snake and stay inside the field
-    }
-    for (int i = 0; i < 9; i++) {       //this creates the possible y coordinates the fruit can have
-        fruitY[i] = 3 + i*5;            //in order to be always alligned with the snake and stay inside the field
+    x = 4; //sets initial x position to 4
+    y = 4; //sets initial y position to 4
+    /*creates the array for the possible x coordinates the fruit can have
+    in order to be always alligned with the snake and stay inside the field*/
+    for (int i = 0; i < 16; i++) { 
+        fruitX[i] = 3 + i*5;       
     }
-    score = 0;                          //initial score is 0
-    a = 0;                              //used to select the direction based ont what button is pressed
-    ntail = 0;                          //used to increase lenght of the tail
+    /*creates the array for the possible y coordinates the fruit can have
+    in order to be always alligned with the snake and stay inside the field*/
+    for (int i = 0; i < 9; i++) {       
+        fruitY[i] = 3 + i*5;            
+    }
+    score = 0; //initial score is 0
+    a = 0; //used to select the direction based ont what button is pressed
+    ntail = 0; //used to increase lenght of the tail, initially set to 0
     k = 0;
-    rx = rand() % 16;                   //choses a random number between 1 and 16, assigning it to the corresponding value in the for loop (x axis)
-    ry = rand() % 9;                    //same as the previous line but between 1 and 9 for the y axis
-    fruitX1 = fruitX[rx]+1;             //this line and the following calculate the center
-    fruitY1 = fruitY[ry]+1;             // point of the fruit needed to register the overlap with the head
-    x_pos.push_back(4);                 //adds initial x coordinate to the movement vector
-    y_pos.push_back(4);                 //adds initial y coordinate to the movement vector
+    rx = rand() % 16; //choses a random number between 1 and 16, assigning it to the corresponding value in the for loop (x axis)
+    ry = rand() % 9;  //same as the previous line but between 1 and 9 for the y axis
+    fruitX1 = fruitX[rx]+1; //this line and the following calculate the center
+    fruitY1 = fruitY[ry]+1; // point of the fruit needed to register the overlap with the head
+    x_pos.push_back(4); //adds initial x coordinate to the movement vector
+    y_pos.push_back(4); //adds initial y coordinate to the movement vector
 }
 
 void Game::movement(Gamepad &pad)
 {
-    if (pad.Y_held() && !(a == 2)) {    //registers what button is being pressed,
-        a = 1;                          //associating it to an integer value
-    }                                   //between 1 and 4
-    if (pad.A_held() && !(a == 1)) {    //the second condition in each loop
-        a = 2;                          //is needed to prevent the snake from
-    }                                   //going backwards on itself
+    /*registers what button is being pressed,
+    associating it to an integer value
+    between 1 and 4
+    the second condition in each loop
+    is needed to prevent the snake from
+    going backwards on itself*/
+    if (pad.Y_held() && !(a == 2)) {    
+        a = 1;                          
+    }                                   
+    if (pad.A_held() && !(a == 1)) {    
+        a = 2;                          
+    }                                   
     if (pad.X_held() && !(a == 4)) {
         a = 3;
     }
@@ -45,17 +55,19 @@
 
 void Game::updating_position()
 {
-    if (a == 1) {                   //reads the integer value stored in the prevoius function
-        x += -5;                        //and depending on its value decides which way the snake moves
+    /*reads the integer value stored in the prevoius function
+    and depending on its value decides which way the snake moves*/
+    if (a == 1) {    
+        x += -5; //left
     }
     if (a == 2) {
-        x += 5;
+        x += 5; //right
     }
     if (a == 3) {
-        y += -5;
+        y += -5; //up
     }
     if (a == 4) {
-        y += 5;
+        y += 5; //down
     }
 
     int prevX = x_pos[0];
@@ -64,15 +76,21 @@
     x_pos[0] = x;
     y_pos[0] = y;
 
-    if (!(ntail + 1 == x_pos.size())) {             //adds each new segment's coordinates to the
-        x_pos.push_back(x_pos[ntail - 1]);          //movement vector in order to give eache
-        y_pos.push_back(y_pos[ntail - 1]);          //section the same movement
+    /*adds each new segment's coordinates to the
+    movement vector in order to give each
+    section the same movement*/
+    if (!(ntail + 1 == x_pos.size())) {             
+        x_pos.push_back(x_pos[ntail - 1]);          
+        y_pos.push_back(y_pos[ntail - 1]);          
     }
 
     if (x_pos.size() > 0) {
-        for (int i = 0; i < x_pos.size() - 1; i++) {                        //regulates the movement of the snake
-            x_pos[x_pos.size() - i - 1] = x_pos[x_pos.size() - i - 2];      //having each section move to the previous
-            y_pos[y_pos.size() - i - 1] = y_pos[y_pos.size() - i - 2];      //coordinates of the segment in front of it
+        /*regulates the movement of the snake
+        having each section move to the previous
+        coordinates of the segment in front of it*/
+        for (int i = 0; i < x_pos.size() - 1; i++) {                        
+            x_pos[x_pos.size() - i - 1] = x_pos[x_pos.size() - i - 2];      
+            y_pos[y_pos.size() - i - 1] = y_pos[y_pos.size() - i - 2];      
         }
         x_pos[1] = prevX;
         y_pos[1] = prevY;
@@ -81,19 +99,23 @@
 
 int Game::death(N5110 &lcd,Gamepad &pad)
 {
-    if (x < 1 || x > WIDTH-2) {                                 //if you hit the side walls you die
+    //if you hit the side walls you die
+    if (x < 1 || x > WIDTH-2) { 
         while (1) {
             gameover(lcd, pad);
-            if (pad.B_held()) {                                 //if you press start you will go back to the menu
+            if (pad.B_held()) {
+                //if you press start you will go back to the menu
                 return 1;
             }
-            if (pad.start_held()) {                             //if you press B, you will initiate a new game
+            if (pad.start_held()) {
+                //if you press B, you will initiate a new game
                 return 2;
             }
         }
     }
-
-    if (y < 1 || y > HEIGHT) {                                  //if you hit the top or bottom walls you die
+    
+    //if you hit the top or bottom walls you die
+    if (y < 1 || y > HEIGHT) {
         while (1) {
             gameover(lcd, pad);
             if (pad.B_held()) {
@@ -104,7 +126,8 @@
             }
         }
     }
-    for (int i = 1; i < x_pos.size(); i++) {                    //if you hit any part of your tail you die
+    //if you hit any part of your tail you die
+    for (int i = 1; i < x_pos.size(); i++) {
         if (x_pos[0] == x_pos[i] && y_pos[0] == y_pos[i]) {
             while (1) {
                 gameover(lcd, pad);
@@ -117,18 +140,18 @@
             }
         }
     }
-    return 0;
+    return 0; //if 0 is returned, there is no gamover and the game goes on 
 }
 
 void Game::draw(N5110 &lcd,Gamepad &pad)
 {
     lcd.clear();
-    lcd.drawRect(1,1,WIDTH-2,HEIGHT-1,FILL_TRANSPARENT);    //rectangle around border of field
-    lcd.drawRect(fruitX[rx],fruitY[ry],3,3,FILL_BLACK);     //fruit on the field
-    lcd.drawCircle(x,y,2,FILL_TRANSPARENT);                 //initial snake design
+    lcd.drawRect(1,1,WIDTH-2,HEIGHT-1,FILL_TRANSPARENT); //rectangle around border of field
+    lcd.drawRect(fruitX[rx],fruitY[ry],3,3,FILL_BLACK); //fruit on the field
+    lcd.drawCircle(x,y,2,FILL_TRANSPARENT); //initial snake design
     //printf("size of vector %d\n", x_pos.size());
     for (k = 1; k <= ntail; k++) {
-        lcd.drawCircle(x_pos[k],y_pos[k],2,FILL_TRANSPARENT);   //draws each new segment of the snake
+        lcd.drawCircle(x_pos[k],y_pos[k],2,FILL_TRANSPARENT); //draws each new segment of the snake
         //printf("draw \n");
     }
     lcd.refresh();
@@ -142,12 +165,13 @@
 
 void Game::gameover(N5110 &lcd,Gamepad &pad)
 {
+    //display of the gameover screen
     lcd.clear();
-    lcd.printString("GAME OVER",WIDTH/2-25,0);          //display of the gameover screen
+    lcd.printString("GAME OVER",WIDTH/2-25,0);          
     sprintf (buffer, "Score: %d",score);
-    lcd.printString(buffer,WIDTH/2-26,2);               //displays your score
-    lcd.printString("PLAY AGAIN: B",0,4);               //if you want to play again press B
-    lcd.printString("MENU: START",17,5);                //if you want to access the main menu press start
+    lcd.printString(buffer,WIDTH/2-26,2); //displays your score
+    lcd.printString("Play Again: B",0,4); //if you want to play again press B
+    lcd.printString("Menu: Start",0,5); //if you want to access the main menu press start
     pad.leds_on();
     wait(0.1);
     pad.leds_off();
@@ -159,30 +183,36 @@
 
 void Game::point(N5110 &lcd,Gamepad &pad)
 {
-    if (x == fruitX1 && y == fruitY1) {             //if central coordinate of the snake head is equal to the central coordinate of the food:
+    /*if central coordinate of the snake head 
+    is equal to the central coordinate of the food:*/
+    if (x == fruitX1 && y == fruitY1) {
         //printf("Snake x: %d\n", x);
         //printf("Snake y: %d\n", y);
         //printf("seg1 x: %d\n", x_pos[1]);
         //printf("seg1 y: %d\n", y_pos[1]);
         //printf("Fruit x coordinate: %d\n", fruitX1);
         //printf("Fruit y coordinate: %d\n", fruitY1);
-        score = score + 10;                         //adds 10 to the score each time you eat a fruit
+        score = score + 10; //adds 10 to the score each time you eat a fruit
         pad.tone(750.0,1);
-        rx = rand() % 16;                           //generates a new random x coordinate for the food
-        ry = rand() % 9;                            //generates a new random x coordinate for the food
+        rx = rand() % 16; //generates a new random x coordinate for the food
+        ry = rand() % 9; //generates a new random x coordinate for the food
         //printf("rx: %d\n", rx);
         //printf("ry: %d\n", ry);
         fruitX1 = fruitX[rx]+1;
         fruitY1 = fruitY[ry]+1;
         for (int i = 0; i < x_pos.size(); i++) {
-            if (fruitX1 == x_pos[i] && fruitY1 == y_pos[i]) {       //if the random set of coordinates
-                rx = rand() % 16;                                   //corresponds to the position of one of the segments of the snake
-                ry = rand() % 9;                                    //it finds a new set of coordinates
+            /*if the random set of coordinates
+            corresponds to the position of one of 
+            the segments of the snake it finds
+            a new set of coordinates*/
+            if (fruitX1 == x_pos[i] && fruitY1 == y_pos[i]) {       
+                rx = rand() % 16;                                   
+                ry = rand() % 9;                                    
                 fruitX1 = fruitX[rx]+1;
                 fruitY1 = fruitY[ry]+1;
             }
         }
-        ntail++;                                                    //increases the lenght of the tail
-        lcd.drawRect(fruitX[rx],fruitY[ry],3,3,FILL_BLACK);         //draws the new fruit
+        ntail++; //increases the lenght of the tail
+        lcd.drawRect(fruitX[rx],fruitY[ry],3,3,FILL_BLACK); //draws the new fruit
     }
 }
\ No newline at end of file