Diff: Gold/Gold.cpp

Revision:

19:08c582bcdc98

Parent:

12:07a9f2140d9b

diff -r d4fccdf8d90e -r 08c582bcdc98 Gold/Gold.cpp
--- a/Gold/Gold.cpp	Tue May 12 12:38:14 2020 +0000
+++ b/Gold/Gold.cpp	Wed May 13 14:07:20 2020 +0000
@@ -9,40 +9,42 @@
 {
 
 }
-
+// initialise the gold
 void Gold::init(int gold_num)
 {
-   _gold_num = gold_num;
-   _gold_left = _gold_num;
-   srand(time(NULL));
-   _gold_speed=1;
-   for (int i=0;i<_gold_num;i++){
-     _gold_caught[i] = 0;
-     _gold_reached[i] = 0;
-
-    _x[i] = 3+(rand()%78);
-    _y[i] = 19+(rand()%27); 
-    }
-
-    
+     _gold_num = gold_num; //number of gold
+     _gold_left = _gold_num; //left number
+      //create random positions for golds
+     srand(time(NULL)); 
+     _gold_speed=1;
+     for (int i=0;i<_gold_num;i++){
+       _gold_caught[i] = 0;
+       _gold_reached[i] = 0;
+       _x[i] = 3+(rand()%78);
+       _y[i] = 19+(rand()%27); 
+     }
 }
 
+//draw the golds
 void Gold::draw(N5110 &lcd)
 {
     for (int i=0;i<9;i++){
         if(_gold_reached[i]==0){
-          lcd.drawCircle(_x[i],_y[i],2,FILL_BLACK);   // lcd.drawCircle(_x[i],_y[i],3,FILL_BLACK);
+          lcd.drawCircle(_x[i],_y[i],2,FILL_BLACK); // draw circles as golds
           }
     } 
     lcd.refresh();
 }
 
+//update the positions of golds
 void Gold::update()
 {
     for (int i=0;i<_gold_num;i++) {
-        
+        //if the gold is been caught, it will go up
         if (_gold_caught[i]==1&&_gold_reached[i]==0) {
             _y[i]-=_gold_speed;
+            //if gold reached the upper boundary, reached flag will be 1
+            //and left number will -1
            if (_y[i]<=17) {
               _gold_reached[i]=1;
               _gold_left--;
@@ -51,11 +53,13 @@
     }
 }
 
+//mark the gold has been caught
 void Gold::gold_caught(int caught_i)
 {
     _gold_caught[caught_i]=1;
 }
 
+// return the lifted gold number
 int Gold::get_reached_num()
 {
     int n=0;
@@ -67,27 +71,31 @@
     return n;
 }
 
+//reyurn the number of left gold
 int Gold::get_left_num()
 {
     int left_n = _gold_left;
     return left_n;
 }
 
+//return the position of gold with serial number gold_i
 Vector2D Gold::get_pos(int gold_i)
 {
     Vector2D p = {_x[gold_i],_y[gold_i]};
     return p;
 }
 
+//set the position of gold with serial number gold_i
 void Gold::set_pos(Vector2D p) {
     for (int i=0;i<_gold_num;i++){
         if(_gold_reached[i]==0){
           _x[i] = p.x;
           _y[i] = p.y;
-          }
+        }
     }
 }
 
+//set the rising speed of gold
 void Gold::set_speed(int speed) {
     _gold_speed = speed;
 }
\ No newline at end of file