private void UpdateSnake(object sender, EventArgs e)
{
if (!gameOver)
{
for (int i = snake.Count - 1; i >= 0; i--)
{
if (i == 0)
{
switch (direction)
{
case 0: // Down
snake[i].Y++;
break;
case 1: // Left
snake[i].X--;
break;
case 2: // Right
snake[i].X++;
break;
case 3: // Up
snake[i].Y--;
break;
}
SnakePart head = snake[0];
// Out of Bound
//if (head.X >= 20 || head.X < 0 || head.Y >= 15 || head.Y < 0)
//GameOver();
if (head.X >= 20)
head.X = 0;
if (head.X < 0)
head.X = 20;
if (head.Y >= 15)
head.Y = 0;
if (head.Y < 0)
head.Y = 15;
// Collision with itself
for (int j = 1; j < snake.Count; j++)
{
if (head.X == snake[j].X && head.Y == snake[j].Y)
GameOver();
}
//Collision with obstacle
foreach (var collision in obstacles)
{
if (head.X == collision.X && head.Y == collision.Y)
GameOver();
}
// Collision with food
if (head.X == food.X && head.Y == food.Y)
{
SnakePart part = new SnakePart(snake[snake.Count - 1].X, snake[snake.Count - 1].Y);
snake.Add(part);
score++;
GenerateFood();
GenerateObstacle(snake.Count);
}
}
else
{
snake[i].X = snake[i - 1].X;
snake[i].Y = snake[i - 1].Y;
}
}
}
}
private void GenerateObstacle(int obstacleNumber)
{
Random randomObstacle = new Random();
var newObstacle = new SnakePart(randomObstacle.Next(0, 10), randomObstacle.Next(0, 10));
obstacles.Add(newObstacle);
}
private void StartGame()
{
gameOver = false;
snake.Clear();
obstacles.Clear();
score = 0;
SnakePart head = new SnakePart(10, 8);
snake.Add(head);
GenerateFood();
GenerateObstacle(snake.Count);
}
private void GenerateFood()
{
Random random = new Random();
int max_tile_w = pbCanvas.Size.Width / tile_width;
int max_tile_h = pbCanvas.Size.Height / tile_height;
food = new SnakePart(random.Next(0, max_tile_w),random.Next(0, max_tile_h));
}