//Bombs hit Gunners
private bool BombGunnerHitTest(Bomb thisBomb)
{
Rect recBomb = new Rect(Canvas.GetLeft(thisBomb), Canvas.GetTop(thisBomb), thisBomb.ActualWidth, thisBomb.ActualHeight);
Rect recGunner = new Rect(Canvas.GetLeft(imgGunner), Canvas.GetTop(imgGunner), imgGunner.ActualWidth, imgGunner.ActualHeight);
return recBomb.IntersectsWith(recGunner);
}
//Bombs Hit shield elements
private bool BombShieldElementHitTest(Bomb thisBomb, shieldElement thisShieldElement)
{
Rect recBomb = new Rect(Canvas.GetLeft(thisBomb), Canvas.GetTop(thisBomb), thisBomb.ActualWidth, thisBomb.ActualHeight);
Rect recShieldElement = new Rect(Canvas.GetLeft(thisShieldElement), Canvas.GetTop(thisShieldElement), 10, 20);
return recBomb.IntersectsWith(recShieldElement);
}
//the idea behind this is that every game tick each invader has a 1 in 1000 chance of dropping a bomb
//the chances of dropping get higher for each new level.
private void invadersDropBombs()
{
//so run through all the invaders
foreach (Invader thisInvader in Aliens)
{
//pick a random integer between 0 and intBombRate and if it is a 1 drop the bomb
if (randomObj.Next(intBombRate) == 1)
{
//instanciate a new bomb and add it to the canvas and add a reference to it to the list Bombs.
Bomb newBomb = new Bomb();
cnvSpace.Children.Add(newBomb);
Bombs.Add(newBomb);
//set the position of the bomb to be that of the alien that dropped it
Canvas.SetLeft(newBomb, Canvas.GetLeft(thisInvader)+15);
Canvas.SetTop(newBomb, Canvas.GetTop(thisInvader)+30);
}
}
}