public ErrorMessage PlayGame()
{
ErrorMessage message = ErrorMessage.noError;
if (!frog.Alive)
{
frog.Position = FindFreeCell();
frog.Alive = true;
}
grid.Draw();
if (snake.Alive)
{
snake.Draw();
snake.Move();
}
if (frog.Alive)
{
frog.Draw();
}
if (frog.Position.X == snake.Position[1].X && frog.Position.Y == snake.Position[1].Y) // Snake eat frog
{
message = ErrorMessage.snakeEatenFrog;
frog.Alive = false;
points++;
snake.Position.Add(frog.Position);
}
for (int i = 1; i < snake.Position.Count; i++) // Snake Hit Self
{
if (snake.Position[0].X == snake.Position[i].X && snake.Position[0].Y == snake.Position[i].Y)
{
snake.Alive = false;
message = ErrorMessage.snakeHitSelf;
}
}
if (snake.Position[0].X >= 30 || snake.Position[0].X < 0 || snake.Position[0].Y >= 30 || snake.Position[0].Y < 0) // Snake hit wall
{
message = ErrorMessage.snakeHitWall;
snake.Alive = false;
}
return(message);
}
public ErrorMessage PlayGame()//the actual gameplay of the game, the action that occur at each timer tick
{
grid.Draw();
snake.Draw();
if (frog.Alive == false)
{
frog.Position = FindFreeCell();
frog.Alive = true;
}
frog.Draw();
snake.Move();
ErrorMessage message = ErrorMessage.noError;
if (snake.CheckWall() == true)
{
message = ErrorMessage.snakeHitWall;
frog.Alive = false;
}
if (snake.CheckSelf() == true)
{
message = ErrorMessage.snakeHitSelf;
frog.Alive = false;
}
if (snake.EatFrog(frog.Position) == true)
{
frog.Alive = false;
snake.Grow();
message = ErrorMessage.snakeEatenFrog;
}
return(message);
}