void dropInvaders()
{
if (allInvaders.Length != 0)
{
foreach (GameObject invader in allInvaders)
{
invaderBehaviour script = invader.GetComponent <invaderBehaviour> ();
script.drop(dropStep);
}
}
}
// Use this for initialization
void Start()
{
if (cam == null)
{
cam = Camera.main;
}
Vector3 maxCorner = new Vector3(Screen.width, Screen.height, 0.0f);
Vector3 maxCornerW = cam.ScreenToWorldPoint(maxCorner);
maxWidth = maxCornerW.x;
GameObject invaderPrefab;
invaderMoveRight = true;
invaderMoveDown = false;
float startPositionX = -maxWidth / 1.2f;
float starPositionY = ceiling;
// make this a function of the screen size so that it is consistent proportionally
// across all screen sizes
invaderSpeed = maxWidth * 2;
for (int i = 0; i < MAX_ROWS; i++)
{
if (i == 0)
{
invaderPrefab = invader_1;
}
else if (i > 0 && i < 3)
{
invaderPrefab = invader_2;
}
else
{
invaderPrefab = invader_3;
}
for (int j = 0; j < MAX_COLUMNS; j++)
{
Vector3 position = new Vector3(startPositionX + spacingX * j, starPositionY + spacingY * i, 0.0f);
GameObject invader = Instantiate(invaderPrefab, position, Quaternion.identity) as GameObject;
if (i % 2 == 0)
{
invaderBehaviour invaderScript = invader.GetComponent <invaderBehaviour> ();
SpriteRenderer invaderSpriteRenderer = invader.GetComponent <SpriteRenderer> ();
Sprite newStartPostion = invaderScript.position_2;
invaderSpriteRenderer.sprite = newStartPostion;
}
}
}
}
void moveInvaders()
{
bool flip = false;
if (allInvaders.Length != 0)
{
foreach (GameObject invader in allInvaders)
{
invaderBehaviour script = invader.GetComponent <invaderBehaviour> ();
bool retVal = script.move(-maxWidth, maxWidth, invaderSpeed, invaderMoveRight);
if (flip == false && retVal == true)
{
flip = true;
}
}
}
if (flip)
{
invaderMoveDown = true;
invaderMoveRight = !invaderMoveRight;
}
}
