fruits + deaths

snake.ino

@@ -1,5 +1,5 @@
 #define BOARD_LENGTH 8
-#define SNAKE_MAX_SIZE 12
+#define SNAKE_MAX_SIZE 32
 
 struct pair {
   int x;
@@ -12,11 +12,14 @@ private:
   int snake_size;
   pair pos[64];
   pair get_next_move(pair p);
+  pair fruitPos;
+  bool fruit;
 
 public:
   Snake() {
     this->state = 'U';
     this->snake_size = 4;
+    fruit = false;
     for (int i = snake_size - 1; i >= 0; i--) {
       pair p;
       p.x = 5;
@@ -44,11 +47,36 @@ public:
       pair p = pos[i];
       pixels[p.x][p.y] = LOW; // TURN ON PIXELS OF SNAKE
     }
+    if(fruit) 
+      pixels[fruitPos.x][fruitPos.y] = LOW;
   }
-  void next_move();
   pair snake_head() {
     return pos[0];
   }
+  void generate_fruit() {
+    if(!fruit) {
+      fruit = true;
+      fruitPos.x = random(7);
+      fruitPos.y = random(7);
+    }
+  }
+  void next_move() {
+    for (int i = snake_size; i > 0; i--) {
+      pos[i] = pos[i - 1];
+    }
+    pos[0] = get_next_move(pos[0]);
+    if (fruit) {
+      if (pos[0].x == fruitPos.x && pos[0].y == fruitPos.y) {
+        grow();
+        fruit = false;
+      }
+    }
+  }
+  bool eats_itself() {
+    for(int i = 1; i < snake_size; i++)
+      if( pos[0].x == pos[i].x && pos[0].y == pos[i].y ) return true;
+    return false;
+  }
 };
 
 pair Snake::get_next_move(pair p) {
@@ -74,13 +102,6 @@ pair Snake::get_next_move(pair p) {
   return r;
 }
 
-void Snake::next_move() {
-  for (int i = snake_size; i > 0; i--) {
-    pos[i] = pos[i - 1];
-  }
-  pos[0] = get_next_move(pos[0]);
-}
-
 void Snake::grow() { 
   if (snake_size < SNAKE_MAX_SIZE) {
     pos[snake_size] = pos[snake_size - 1];
@@ -124,14 +145,36 @@ void setup() {
 }
 
 void loop() {
-  if(random(50) == 0) snake.grow();
+  if(random(20) == 0) snake.generate_fruit();
   snake.snake_to_matrix(pixels);
   snake.next_move();
   // draw the screen:
+  if(snake.eats_itself()){
+    for(int i = 0; i < 3; i++){
+      for(int j = 0; j < 100; j++)
+        Display();
+     delay(500);
+    }
+    int dead[8][8] = {
+      {0,1,1,1,1,1,1,0},
+      {1,0,1,1,1,1,0,1},
+      {1,1,0,1,1,0,1,1},
+      {1,1,1,0,0,1,1,1},
+      {1,1,1,0,0,1,1,1},
+      {1,1,0,1,1,0,1,1},
+      {1,0,1,1,1,1,0,1},
+      {0,1,1,1,1,1,1,0},
+    };
+    for(int i = 0; i < 8; i++)
+      for(int j = 0; j < 8; j++)
+        pixels[i][j] = dead[i][j];
+    while(true) Display();
+  }
   for(int i = 0; i < 30; i++) {
     Display();
     snake.change_state(read_sensors());
   }
+  
 }
 
 void readSensors() {