private void pictureBoxArena_Paint(object sender, PaintEventArgs e)
{
Graphics canvas = e.Graphics;
if (!Settings.GameOver)
{
//Draw snake
for (SnakeNode currentNode = Snake.headNode; currentNode != null; currentNode = currentNode.next)
{
Brush snakeColour = currentNode == Snake.headNode ? Brushes.Beige : Brushes.Green;
//Draw snake
canvas.FillEllipse(snakeColour,
new Rectangle(currentNode.x * Settings.Width,
currentNode.y * Settings.Height,
Settings.Width, Settings.Height));
}
//Draw Food
canvas.FillEllipse(Brushes.Red,
new Rectangle(food.x * Settings.Width,
food.y * Settings.Height, Settings.Width, Settings.Height));
}
else
{
string gameOver = "GAME OVER!!\nPress Enter to try again";
gameoverlbl.Text = gameOver;
gameoverlbl.Visible = true;
}
}
//Place random food object
private void GenerateFood()
{
int maxXPos = pictureBoxArena.Size.Width / Settings.Width;
int maxYPos = pictureBoxArena.Size.Height / Settings.Height;
Random random = new Random();
food = new SnakeNode(random.Next(0, maxXPos), random.Next(0, maxYPos));
}
public void AddToEnd(int x, int y)
{
if (next == null)
{
next = new SnakeNode(x, y);
}
else
{
next.AddToEnd(x, y);
}
}
public void AddToEnd(int x, int y)
{
if (headNode == null)
{
headNode = new SnakeNode(x, y);
}
else
{
headNode.AddToEnd(x, y);
}
}
private void StartGame()
{
new Settings();
gameoverlbl.Visible = false;
LaunchTimer();
//Initialize SnakeSnake
Snake.headNode = null;
headNode = new SnakeNode(35, 10);
Snake.headNode = headNode;
Snake.AddToEnd(35, 9);
Snake.AddToEnd(35, 8);
score.Text = Settings.Score.ToString();
GenerateFood();
}
public SnakeNode(int X, int Y)
{
x = X;
y = Y;
next = null;
}
public SnakeNodes()
{
headNode = null;
}
private void MovePlayer()
{
SnakeNodes NewSnake = new SnakeNodes();
SnakeNode prevNode = new SnakeNode();
for (; Snake.headNode != null; Snake.headNode = Snake.headNode.next)
{
if (Snake.headNode.x == headNode.x && Snake.headNode.y == headNode.y)
{
prevNode.x = Snake.headNode.x;
prevNode.y = Snake.headNode.y;
switch (Settings.direction)
{
case SnakeDirection.Right:
Snake.headNode.x++;
break;
case SnakeDirection.Left:
Snake.headNode.x--;
break;
case SnakeDirection.Up:
Snake.headNode.y--;
break;
case SnakeDirection.Down:
Snake.headNode.y++;
break;
}
NewSnake.AddToEnd(Snake.headNode.x, Snake.headNode.y);
headNode = Snake.headNode;
//Get maximum X and Y Pos
int maxXPos = pictureBoxArena.Size.Width / Settings.Width;
int maxYPos = pictureBoxArena.Size.Height / Settings.Height;
//Detect collission with game borders.
if (Snake.headNode.x < 0 || Snake.headNode.y < 0 ||
Snake.headNode.x >= maxXPos || Snake.headNode.y >= maxYPos)
{
Die();
}
//Detect collission with body
var bodyNode = Snake.headNode.next;
while (bodyNode != null)
{
if (bodyNode.x == Snake.headNode.x && bodyNode.y == Snake.headNode.y)
{
Die();
}
bodyNode = bodyNode.next;
}
//Detect collision with food piece
if (Snake.headNode.x == food.x && Snake.headNode.y == food.y)
{
Eat();
}
}
else
{
NewSnake.AddToEnd(prevNode.x, prevNode.y);
prevNode.x = Snake.headNode.x;
prevNode.y = Snake.headNode.y;
}
}
Snake = NewSnake;
}
