//Moves Invader in horizontal Axis
private IEnumerator UpdateInvaderMovementHoriZontal()
{
m_firableColumnReady = false;
Invader[] firableColumn = new Invader[m_invaderRows[0].Length];
// we also calulate the firing coumn here to avoid another itration
for (int i = m_invaderRows.Length - 1; i >= 0; i--)
{
Invader[] invaderRow = m_invaderRows[i];
for (int j = 0; j < m_gridColumns; j++)
{
Invader invader = invaderRow[j];
if (invader != null)
{
Vector3 horizontalDeltaMove = new Vector3(m_invaderHorMovDirection * m_horizonatalVeleocity, 0, 0); // calculate new move delta
invader.Move(horizontalDeltaMove);
invader.PlayAnimation();
if (firableColumn[j] == null)
{
firableColumn[j] = invader;
}
}
}
yield return(new WaitForSeconds(m_moveUpdateInterval / m_invaderRows.Length));
}
m_firableColumn = firableColumn;
m_firableColumnReady = true;
yield return(null);
}
// Moves Invader in vertical down Axis when the horizonatl move reach on the boundary
private void UpdateInvaderMovementVertical()
{
for (int i = m_invaderRows.Length - 1; i >= 0; i--)
{
Invader[] invaderRow = m_invaderRows[i];
for (int j = 0; j < m_gridColumns; j++)
{
Invader invader = invaderRow[j];
if (invader != null)
{
Vector3 verticallDeltaMove = new Vector3(0, -m_verticalVeleocity * 1.0f, 0);
invader.Move(verticallDeltaMove);
invader.PlayAnimation();
}
}
}
}