/// <summary>
/// Checks if there was a collision between a laser and an alien by iterating through the AlienSquad
/// array. Returns True if a collision was detected, False if there was no collision. Also checks for
/// a collision with the mothership.
/// </summary>
/// <param name="laser">Laser that was launched by a player to be checked for collisions.</param>
/// <returns>A boolean representing if a collision was detected</returns>
protected override bool checkCollision(ProjectileSprite laser)
{
bool collision = false;
int pts = 0;
for (int row = 0; row < alienSquad.getAlienRowCount(); row++)
{
for (int col = 0; col < alienSquad.getAlienColumnCount(); col++)
{
if (laser.GetBoundary().Intersects(alienSquad[row, col].GetBoundary()))
{
if (alienSquad[row, col].GetAlienState() == AlienState.ACTIVE)
{
// Only gives points if Alien dies, on higher difficulties multiple hits will not award points
if (alienSquad[row, col].GetHitPoints() == 1)
{
pts = 10 + (alienSquad.getAlienRowCount() - 1 - row) * 10;
}
onAlienCollision(alienSquad[row, col], pts);
collision = true;
//remove laser after it hits alien
laser.Dispose();
bullets.Remove(laser);
return(collision);
}
}
}
}
if (laser.GetBoundary().Intersects(mothership.GetBoundary()))
{
if (mothership.GetAlienState() == AlienState.ACTIVE)
{
onMothershipCollision(mothership, 100);
collision = true;
// remove laser after it hits alien
laser.Dispose();
bullets.Remove(laser);
return(collision);
}
}
return(collision);
}
