// Update is called once per frame
/*<summary>
* Update is responsible for movement, ar for instantiation of special food.
* </summary>
*/
void Update()
{
//if game is over don't want snake to move
if (GameManager.instance.gameOver)
{
return;
}
//to be sure if game could be continued if for some reason food was not created
if (GameObject.FindGameObjectsWithTag("NormalFood").Length == 0)
{
foodPrefab.GetComponent <Food>().AddNewOne();
}
//counting time to instantiate new special food object
timeToNewSpecialFood -= Time.deltaTime;
if (timeToNewSpecialFood <= 0) // if all time has passed
{
//create new special food object
SpecialFood sf = specialFoodPrefab.GetComponent <SpecialFood>();
sf.AddNewOne();
//random new time to create new special food object
//range is selected to not create new object before old one is not expired
timeToNewSpecialFood = Random.Range(2 * sf.timeToDestroy, 2 * sf.timeToDestroy + maxTimeToNewSpecialFood);
}
//if there is not a time for a next move
if (Time.time < nextFrameTime)
{
return;
}
nextFrameTime += interval; // set up a new move time
SnakeElement.MoveTail(snake); //firstly move a snake tail
SnakeHead head = snake[0] as SnakeHead; // head will always be firs member
//check if rotation is set up
if (isTurningLeft)
{
isTurningLeft = false;
head.RotateHeadCounterClockwise();
}
else if (isTurningRight)
{
isTurningRight = false;
head.RotateHeadClockwise();
}
SnakeElement.MoveHead(snake); // move head including rotation
}
// Start is called before the first frame update
/*<summary>
* Starts creating a new gamefield, and creating first snake.
* Then it's adjusting an game speed interval, and special food time.
* </summary>
*/
void Start()
{
//to be sure if it's set up
GameManager.instance.gameOver = false;
//interval from options
interval = GameManager.instance.GameSpeed;
nextFrameTime = Time.time + interval;
timeToNewSpecialFood = Random.Range(0f, maxTimeToNewSpecialFood); //generating time to instantiate a new special food object
//generate GameField
Field field = fieldPrefab.gameObject.GetComponent <Field>();
field.CreateField();
//create wall;
Wall wall = wallPrefab.gameObject.GetComponent <Wall>();
wall.BuildWall(field);
//snake initialization
snake = new List <SnakeElement>();
SnakeElement head = headPrefab.gameObject.GetComponent <SnakeHead>();
head.AddElement(snake);
for (int i = 0; i < 4; i++)
{
SnakeElement tail = tailPrefab.gameObject.GetComponent <SnakeTail>();
tail.AddElement(snake);
SnakeElement.MoveTail(snake);
SnakeElement.MoveHead(snake);
}
//food creation
Food food = foodPrefab.gameObject.GetComponent <Food>();
food.AddNewOne();
}