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);
}
