Diff: snake/snake.cpp

Revision:

20:980b37fde361

Parent:

18:e58a1f8e72ad

diff -r dfa241957855 -r 980b37fde361 snake/snake.cpp
--- a/snake/snake.cpp	Tue May 08 12:51:40 2018 +0000
+++ b/snake/snake.cpp	Tue May 08 13:41:08 2018 +0000
@@ -1,6 +1,5 @@
 #include "snake.h"
 
-
 snake::snake(){
     
 }
@@ -10,19 +9,20 @@
     
 }
 
-void snake::init(){   
-    for (int i = 0; i <_point ; i++) {
+void snake::init(){   //initialise 
+    for (int i = 0; i <_point ; i++) {//the initial length of snake = 6 pixel.  i++ until it = 6 .
+         //the position both old and new x are changing as the snake move to east initially. And old and new y keep same position. 
         _xoldpos[i] = 30;       
         _yoldpos[i] = 23; 
         _xnewpos[i] = 30 ; 
         _ynewpos[i] = 23; 
     }
-    dir_snake = 3;
+    dir_snake = 3; // 3 = east . initial direction
     _array = 100;
     _point = 6;
 
 }
-
+//direction of the snake 
 void snake::update(Direction d,float mag){
     if (dir_snake == 1){
         s() ;}
@@ -43,7 +43,7 @@
                
 }
 
-
+//draw the snake . the length of the snake is changing as the got point changing
 void snake::draw(N5110 &lcd)
 {
     for(int i=0; i<_point; i++) {      
@@ -51,13 +51,13 @@
            }
 }
 
-Vector2D snake::get_pos()
+Vector2D snake::get_pos()//get the position of snake in 2D vector. From pong sample code
 {
     Vector2D p = {_xnewpos[0],_ynewpos[0]};
     return p;
 }
 
-void snake::set_pos(Vector2D p)
+void snake::set_pos(Vector2D p)//set the position in 2D vector . From pong sample code
 {
     _xnewpos[0] = p.x;
     _ynewpos[0] = p.y;
@@ -65,21 +65,21 @@
 }
 
 
-void snake::point()
+void snake::point()//To add the point that the snake ate. 
 {
     _point++;
 
 }
 
 
-int snake::get_point()
+int snake::get_point()//used to display the number of point
 {
     return _point -6 ; 
 }
 
 
-void snake::n() {
-    _xnewpos[0] = _xoldpos[0] ; 
+void snake::n() {//snake move to north
+    _xnewpos[0] = _xoldpos[0] ;
     for (int i = 0; i < _array; i++) {
         _xnewpos[i+1] = _xoldpos[i];
        }
@@ -95,7 +95,7 @@
 }
 
 
-void snake::s(){
+void snake::s(){//snake move to south 
         _xnewpos[0] = _xoldpos[0] ; 
     for (int i = 0; i < _array; i++) { 
         _xnewpos[i+1] = _xoldpos[i]; 
@@ -112,7 +112,7 @@
 }
 
 
-void snake::w(){
+void snake::w(){//snake move to west
         _xnewpos[0] = _xoldpos[0]-1;
         for (int i = 0; i < _array; i++) {
         _xnewpos[i+1] = _xoldpos[i];
@@ -129,7 +129,7 @@
 }
     
 
-void snake::e(){
+void snake::e(){//snake move to east
         _xnewpos[0] = _xoldpos[0]+1; 
     for (int i = 0; i < _array; i++) {
         _xnewpos[i+1] = _xoldpos[i];