Diff: snake/snake.cpp

Revision:

2:934daa65f73d

Parent:

1:b49c36604125

Child:

6:feb6351e6f8e

--- a/snake/snake.cpp	Sat Apr 13 10:07:50 2019 +0000
+++ b/snake/snake.cpp	Sat Apr 13 15:45:03 2019 +0000
@@ -18,14 +18,15 @@
     _x[0] = WIDTH/2 -  _size/2;
     _y[0] = HEIGHT/2 - _size/2;
 
-    _x[1] = WIDTH/2 -  _size/2 -1*size;
-    _y[1] = HEIGHT/2 - _size/2;
+    _x[1] = _x[0] -size;
+    _y[1] = _y[0];
     
-    _x[2] = WIDTH/2 -  _size/2 -2*size;
-    _y[2] = HEIGHT/2 - _size/2;           
+    _x[2] = _x[0] -2*size;
+    _y[2] = _y[0];
      
+    ball( _length);
     _score = 0;  // start score from zero
-
+    over = 0;
 }
 
 int snake::get_length(){
@@ -40,16 +41,14 @@
     _y[k] = _y[k-1];
     }
     if(direction == 0){
-     _x[0] = _x[0] + 1;
+     _x[0] = _x[0] + _size;
      }else if(direction == 1){
-         _y[0] = _y[0] + 1;
+         _y[0] = _y[0] + _size;
          }else if(direction == 2){
-             _x[0] = _x[0] - 1;
+             _x[0] = _x[0] - _size;
              }else if(direction == 3){
-                 _y[0] = _y[0] - 1;
+                 _y[0] = _y[0] - _size;
     }
-                 
-
 }
  
 
@@ -58,21 +57,60 @@
 
     // draw snake in screen buffer. 
         lcd.drawRect(0,0,WIDTH,HEIGHT,FILL_TRANSPARENT);
+        lcd.drawRect(1,1,WIDTH-2,HEIGHT-2,FILL_TRANSPARENT);
         for (int i = 0; i < length; i++){
         lcd.drawRect(_x[i],_y[i],_size,_size,FILL_BLACK);
-      }
+        }
+        
+    // draw ball in screen buffer.
+        lcd.drawCircle(ball_x,ball_y,1,FILL_BLACK);
+}
+
+void snake::ball(int length)
+{
+    srand(time(NULL));
+    ball_x = 3 + rand() % (WIDTH - 6); // randomise initial position of ball. 
+    ball_y = 3 + rand() % (HEIGHT - 6);
+    for (int i = 0; i < length; i++) {
+        if(ball_x == _x[i] && ball_y == _y[i]){
+                srand(time(NULL));
+                ball_x = 3 + rand() % (WIDTH - 6); // randomise initial position of ball. 
+                ball_y = 3 + rand() % (HEIGHT - 6);
+            }
+    }
+
+}
 
+void snake::check_eat(Gamepad &pad)
+{
+    //
+    if (ball_x + _size >=  _x[0] && ball_x - _size <=  _x[0] && ball_y + _size >=  _y[0] && ball_y - _size <=  _y[0]) {
+        _length++;
+        _score++;
+        ball(_length);
+        pad.tone(1500.0,0.5);
+        pad.leds_on();
+        wait(0.05);
+        pad.leds_off();
+    }
+}
+
+void snake::check_over(N5110 &lcd)
+{
+    if ( _x[0] >= WIDTH - 2 | _x[0] <= 2 | _y[0] >= HEIGHT - 2 | _y[0] <= 2){
+        over = 1;
+        }
+    for (int i = 1; i < _length; i++){
+        if(_x[0] == _x[i] && _y[0] == _y[i]){
+            over = 1;
+            }
+    }
 }
 
 
-void snake::add_score()
-{
-    _score++;
-}
-
 int snake::get_score()
 {
-    return _score;
+   return _score;
 }