private void InitBonuses(int count)
{
for (int i = 0; i < count; i++)
{
Bonus bonus = new Bonus();
bonus.Radius = 10;
bonus.Position = new Point(
rnd.Next(bonus.Radius, windowWidth - bonus.Radius),
rnd.Next(bonus.Radius, windowHeight - bonus.Radius));
gameObjects.Add(bonus);
if (i == 5)
{
SuperBonus superBonus = new SuperBonus();
superBonus.Radius = 5;
superBonus.Position = new Point(
rnd.Next(superBonus.Radius, windowWidth - superBonus.Radius),
rnd.Next(superBonus.Radius, windowHeight - superBonus.Radius));
gameObjects.Add(superBonus);
}
else if (i == 7)
{
SpeedBonus speedBonus = new SpeedBonus();
speedBonus.Radius = 15;
speedBonus.Position = new Point(
rnd.Next(speedBonus.Radius, windowWidth - speedBonus.Radius),
rnd.Next(speedBonus.Radius, windowHeight - speedBonus.Radius));
gameObjects.Add(speedBonus);
}
else if (i == 8)
{
EvilBonus evilBonus = new EvilBonus();
evilBonus.Radius = 10;
evilBonus.Position = new Point(
rnd.Next(evilBonus.Radius, windowWidth - evilBonus.Radius),
rnd.Next(evilBonus.Radius, windowHeight - evilBonus.Radius));
gameObjects.Add(evilBonus);
}
}
}
private void GameTick(object sender, EventArgs e)
{
Snake snake = gameObjects[0] as Snake;
// update all game objects
Bonus hitBonus = null;
SuperBonus hitSuperBonus = null;
SpeedBonus hitSpeedBonus = null;
foreach (IGameObject gameObject in gameObjects)
{
gameObject.Update();
// check hits to bonuses
Bonus bonus = gameObject as Bonus;
SuperBonus superBonus = gameObject as SuperBonus;
SpeedBonus speedBonus = gameObject as SpeedBonus;
EvilBonus evilBonus = gameObject as EvilBonus;
if (bonus != null)
{
if (Math.Abs(bonus.Position.X - snake.Position.X) < bonus.Radius + snake.Radius &&
Math.Abs(bonus.Position.Y - snake.Position.Y) < bonus.Radius + snake.Radius)
{
// its a hit
// store the bonus that hits with the snake
hitBonus = bonus;
}
}
if (superBonus != null)
{
if (Math.Abs(superBonus.Position.X - snake.Position.X) < superBonus.Radius + snake.Radius &&
Math.Abs(superBonus.Position.Y - snake.Position.Y) < superBonus.Radius + snake.Radius)
{
// its a hit
// store the bonus that hits with the snake
hitSuperBonus = superBonus;
}
}
if (speedBonus != null)
{
if (Math.Abs(speedBonus.Position.X - snake.Position.X) < speedBonus.Radius + snake.Radius &&
Math.Abs(speedBonus.Position.Y - snake.Position.Y) < speedBonus.Radius + snake.Radius)
{
// its a hit
// store the bonus that hits with the snake
hitSpeedBonus = speedBonus;
}
}
if (evilBonus != null)
{
if (Math.Abs(evilBonus.Position.X - snake.Position.X) < evilBonus.Radius + snake.Radius + 5 &&
Math.Abs(evilBonus.Position.Y - snake.Position.Y) < evilBonus.Radius + snake.Radius + 5)
{
// bonus will run away
evilBonus.Position = new Point(evilBonus.Position.Y + 10, evilBonus.Position.X + 10);
}
}
}
if (hitBonus != null)
{
gameObjects.Remove(hitBonus);
score++;
scoreText.Text = "SCORE: " + score;
snake.IncLength(10);
if (gameObjects.Count < 30)
{
InitBonuses(10);
}
}
if (hitSuperBonus != null)
{
gameObjects.Remove(hitSuperBonus);
score += 10;
scoreText.Text = "SCORE: " + score;
snake.IncLength(10);
if (gameObjects.Count < 30)
{
InitBonuses(10);
}
}
if (hitSpeedBonus != null)
{
gameObjects.Remove(hitSpeedBonus);
score += 50;
scoreText.Text = "SCORE: " + score;
snake.IncLength(10);
snake.IncSpeed(1);
if (gameObjects.Count < 30)
{
InitBonuses(10);
}
}
// check game over condition
if (snake.Position.X < snake.Radius || snake.Position.X > windowWidth - snake.Radius ||
snake.Position.Y < snake.Radius || snake.Position.Y > windowHeight - snake.Radius ||
snake.HitsItself())
{
GameOver();
}
// draw game
var drawingContext = backingStore.Open();
Render(drawingContext);
drawingContext.Close();
}