void ex_Finished(Explosion ex)
{
explosionsToDelete.Insert(0, explosions.IndexOf(ex));
}
protected void DetectCollisions()
{
List <int> asteroidsToDelete = new List <int>();
List <int> missilesToDelete = new List <int>();
List <int> enemiesToDelete = new List <int>();
foreach (Asteroid a in asteroids)
{
foreach (EShip Enemy in enemies)
{
int sumOfWidths = Enemy.Image.Width / 2 + a.Image.Width / 2;
Vector pointing = new Vector(Enemy.Pos - a.Pos);
float dist = pointing.Magnitude;
if (dist - 10 < sumOfWidths)
{
pointing = new Vector(a.Pos - Enemy.Pos);
Enemy.Vel = new Vector(pointing.Unitized * -5f);
}
if (dist < sumOfWidths)
{
if (!enemiesToDelete.Contains(enemies.IndexOf(Enemy)))
{
enemiesToDelete.Insert(0, enemies.IndexOf(Enemy));
}
}
}
foreach (Missile m in missiles)
{
float sumOfWidths = m.Image.Width / 2 + a.Image.Width / 2;
Vector pointing = m.Pos - a.Pos;
float dist = pointing.Magnitude;
if ((dist < sumOfWidths) && (m.friendlyMissle == true))
{
// Collision detected! Store index for later removal
int idxAsteroid = asteroids.IndexOf(a);
int idxMissile = missiles.IndexOf(m);
if (!asteroidsToDelete.Contains(idxAsteroid))
{
asteroidsToDelete.Insert(0, idxAsteroid);
}
if (!missilesToDelete.Contains(idxMissile))
{
missilesToDelete.Insert(0, idxMissile);
}
}
if (ship != null)
{
sumOfWidths = m.Image.Width / 2 + ship.Image.Width / 2;
pointing = m.Pos - ship.Pos;
dist = pointing.Magnitude;
if (dist < sumOfWidths && !m.friendlyMissle)
{ // Ship was shot by enemy laser
ship.Crashed = true;
Explosion ex = new Explosion(new Vector(ship.Pos),
Properties.Resources.explosionShip, 0,
8, 4, 256, 256);
ex.Finished += ex_Finished;
explosions.Add(ex);
ship = null;
livesLeft--;
if (!missilesToDelete.Contains(missiles.IndexOf(m)))
{
missilesToDelete.Insert(0, missiles.IndexOf(m));
}
// Create a "white hole" for repulsion...
blackHole = new Asteroid(new Vector(width / 2, height / 2),
new Vector(0, 0), 0, 0, Properties.Resources.blackhole);
shipSpawnTmr.Elapsed += shipSpawnTmr_Elapsed;
state = GameState.Resetting;
}
}
if (m.friendlyMissle)
{//killing the alien ships
foreach (EShip enemy in enemies)
{
sumOfWidths = m.Image.Width / 2 + enemy.Image.Width / 2;
pointing = m.Pos - enemy.Pos;
dist = pointing.Magnitude;
if (dist < sumOfWidths)
{
int idxofenemy = enemies.IndexOf(enemy);
int idxMissile = missiles.IndexOf(m);
if (!enemiesToDelete.Contains(idxofenemy))
{
enemiesToDelete.Insert(0, idxofenemy);
}
if (!missilesToDelete.Contains(idxMissile))
{
missilesToDelete.Insert(0, idxMissile);
}
}
}
}
}
if (ship != null)
{
float sumOfWidths2 = ship.Image.Width / 2 + a.Image.Width / 2;
Vector pointing2 = ship.Pos - a.Pos;
float dist2 = pointing2.Magnitude;
if (dist2 < sumOfWidths2)
{ // Ship has collided with an asteroid
ship.Crashed = true;
Explosion ex = new Explosion(new Vector(ship.Pos),
Properties.Resources.explosionShip, 0,
8, 4, 256, 256);
ex.Finished += ex_Finished;
explosions.Add(ex);
ship = null;
livesLeft--;
if (!asteroidsToDelete.Contains(asteroids.IndexOf(a)))
{
asteroidsToDelete.Insert(0, asteroids.IndexOf(a));
}
// Create a "white hole" for repulsion...
blackHole = new Asteroid(new Vector(width / 2, height / 2),
new Vector(0, 0), 0, 0, Properties.Resources.blackhole);
shipSpawnTmr.Elapsed += shipSpawnTmr_Elapsed;
state = GameState.Resetting;
}
}
foreach (int idx in enemiesToDelete)
{
Image img = Properties.Resources.explosion3;
Explosion ex = new Explosion(new Vector(enemies[idx].Pos),
img, rand.Next(0, 360),
5, 5, 80, 80);
ex.Finished += ex_Finished;
explosions.Add(ex);
Score += 1000;
ak += 5;
enemies[idx].shoot.Stop();
enemies.RemoveAt(idx);
}
foreach (int idx in missilesToDelete)
{ // Remove missiles which had been detected to collide
if (missiles[idx].friendlyMissle)
{
shipMissles--;
}
missiles.RemoveAt(idx);
}
missilesToDelete.Clear();
enemiesToDelete.Clear();
}
foreach (int idx in asteroidsToDelete)
{ // Remove asteroids which had been detected to collide
Image img;
int numAcross, numDown, spriteWidth, spriteHeight;
Asteroid a = asteroids[idx];
if (a.Type == 0)
{
img = Properties.Resources.Explosion;
numAcross = 9; numDown = 9; spriteWidth = 100; spriteHeight = 100;
}
else
{
img = Properties.Resources.explosion2;
numAcross = 3; numDown = 4; spriteWidth = 256; spriteHeight = 128;
}
Explosion ex = new Explosion(new Vector(asteroids[idx].Pos),
img, rand.Next(0, 360),
numAcross, numDown, spriteWidth, spriteHeight);
ex.Finished += ex_Finished;
explosions.Add(ex);
// Update the score...
Score += 50 * (4 - asteroids[idx].Size);
//Split the asteroids up
if (asteroids[idx].Size == 3)
{
if (asteroids[idx].Type == 0)
{
Asteroid A1 = new Asteroid(new Vector(asteroids[idx].Pos), new Vector(rand.Next(-10, 10), rand.Next(-10, 10)),
asteroids[idx].Angle + 45, rand.Next(-10, 10), Properties.Resources.AsteroidMed);
A1.Size = asteroids[idx].Size - 1;
Asteroid A2 = new Asteroid(new Vector(asteroids[idx].Pos), new Vector(rand.Next(-10, 10), rand.Next(-10, 10)),
asteroids[idx].Angle - 45, rand.Next(-10, 10), Properties.Resources.AsteroidMed);
A2.Size = asteroids[idx].Size - 1;
asteroids.Add(A1);
asteroids.Add(A2);
}
else
{
Asteroid A1 = new Asteroid(new Vector(asteroids[idx].Pos), new Vector(rand.Next(-10, 10), rand.Next(-10, 10)),
asteroids[idx].Angle + 45, rand.Next(-10, 10), Properties.Resources.Asteroid2Med);
A1.Size = asteroids[idx].Size - 1;
Asteroid A2 = new Asteroid(new Vector(asteroids[idx].Pos), new Vector(rand.Next(-10, 10), rand.Next(-10, 10)),
asteroids[idx].Angle - 45, rand.Next(-10, 10), Properties.Resources.Asteroid2Med);
A2.Size = asteroids[idx].Size - 1;
asteroids.Add(A1);
asteroids.Add(A2);
}
}
else if (asteroids[idx].Size == 2)
{
if (asteroids[idx].Type == 0)
{
Asteroid A1 = new Asteroid(new Vector(asteroids[idx].Pos), new Vector(rand.Next(-10, 10), rand.Next(-10, 10)),
asteroids[idx].Angle + 45, rand.Next(-10, 10), Properties.Resources.AsteroidSmall);
A1.Size = asteroids[idx].Size - 1;
Asteroid A2 = new Asteroid(new Vector(asteroids[idx].Pos), new Vector(rand.Next(-10, 10), rand.Next(-10, 10)),
asteroids[idx].Angle - 45, rand.Next(-10, 10), Properties.Resources.AsteroidSmall);
A2.Size = asteroids[idx].Size - 1;
asteroids.Add(A1);
asteroids.Add(A2);
}
else
{
Asteroid A1 = new Asteroid(new Vector(asteroids[idx].Pos), new Vector(rand.Next(-10, 10), rand.Next(-10, 10)),
asteroids[idx].Angle + 45, rand.Next(-10, 10), Properties.Resources.Asteroid2Small);
A1.Size = asteroids[idx].Size - 1;
Asteroid A2 = new Asteroid(new Vector(asteroids[idx].Pos), new Vector(rand.Next(-10, 10), rand.Next(-10, 10)),
asteroids[idx].Angle - 45, rand.Next(-10, 10), Properties.Resources.Asteroid2Small);
A2.Size = asteroids[idx].Size - 1;
asteroids.Add(A1);
asteroids.Add(A2);
}
}
asteroids.RemoveAt(idx);
ak++;
}
if (ak >= 20 && ak < 40)
{
numMissiles = 20;
}
else if (ak >= 40)
{
numMissiles = 30;
}
}
