// spawn a random asteroid at a random location with random attributes
public void spawnAsteroid()
{
int asteroidIndex;
bool bigAsteroid;
Random rand = new Random();
if (rand.Next(0, 99) < 30)
{
// spawn small asteroid (30% chance)
asteroidIndex = rand.Next(0, 4) + 2;
bigAsteroid = false;
}
else
{
// spawn big asteroid (70% chance)
asteroidIndex = rand.Next(0, 2) % 2;
bigAsteroid = true;
}
// if there are too many asteroids of this type, do not spawn it
if (bigAsteroid && m_numberOfBigAsteroids >= m_maxBigAsteroids)
{
return;
}
if (!bigAsteroid && m_numberOfSmallAsteroids >= m_maxSmallAsteroids)
{
return;
}
bool isInsideOfAsteroid;
bool isTooCloseToShip;
Asteroid newAsteroid = new Asteroid(m_asteroidSprites.getSprite(asteroidIndex), bigAsteroid, m_settings);
do
{
// make sure that the new asteroid is not too close to a space ship
isTooCloseToShip = false;
for (int i = 0; i < m_spaceShipSystem.size(); i++)
{
if (m_spaceShipSystem.getSpaceShip(i).checkExtendedCollision(newAsteroid))
{
isTooCloseToShip = true;
}
}
// also make sure that the asteroid is not stuck inside of another asteroid
isInsideOfAsteroid = false;
if (!isTooCloseToShip)
{
for (int i = 0; i < m_asteroids.Count(); i++)
{
if (m_asteroids[i].checkCollision(newAsteroid))
{
isInsideOfAsteroid = true;
}
}
}
// if it is too close to a ship or inside of another asteroid, then re-randomize its position until it isn't
if (isTooCloseToShip || isInsideOfAsteroid)
{
newAsteroid.randomizePosition();
}
} while(isTooCloseToShip || isInsideOfAsteroid);
// store the asteroid
if (newAsteroid.bigAsteroid)
{
m_numberOfBigAsteroids++;
}
else
{
m_numberOfSmallAsteroids++;
}
m_asteroids.Add(newAsteroid);
}
public void handleCollisions()
{
if (m_projectileSystem == null ||
m_spaceShipSystem == null ||
m_asteroidSystem == null ||
m_explosionSystem == null ||
m_scoreSystem == null)
{
return;
}
// remove any collisions that have been handled and are no longer in collision
for (int i = 0; i < m_asteroidSystem.size(); i++)
{
Asteroid a1 = m_asteroidSystem.getAsteroid(i);
for (int j = 0; j < m_asteroidSystem.size(); j++)
{
Asteroid a2 = m_asteroidSystem.getAsteroid(j);
if (i != j &&
(a1.isCollidingWith(a2) && !a1.checkCollision(a2)) ||
(a2.isCollidingWith(a1) && !a2.checkCollision(a1)))
{
a1.removeCollision(a2);
a2.removeCollision(a1);
}
}
}
// check asteroid > asteroid collision
for (int i = 0; i < m_asteroidSystem.size(); i++)
{
for (int j = i + 1; j < m_asteroidSystem.size(); j++)
{
if (i != j && m_asteroidSystem.getAsteroid(i).checkCollision(m_asteroidSystem.getAsteroid(j)))
{
handleCollision(m_asteroidSystem.getAsteroid(i), m_asteroidSystem.getAsteroid(j));
}
}
// check projectile > asteroid collision
for (int j = 0; j < m_projectileSystem.size(); j++)
{
if (m_projectileSystem.getProjectile(j).checkCollision(m_asteroidSystem.getAsteroid(i)))
{
// [potentially] create a cluster of smaller asteroids if this was a big asteroid
m_scoreSystem.addPoints(m_projectileSystem.getProjectile(j).getProjectileSource(), (m_asteroidSystem.getAsteroid(i).bigAsteroid) ? ScoreType.BigAsteroid : ScoreType.SmallAsteroid);
if (m_asteroidSystem.getAsteroid(i).bigAsteroid)
{
m_asteroidSystem.spawnAsteroidCluster(m_asteroidSystem.getAsteroid(i));
}
m_explosionSystem.spawnExplosion(m_asteroidSystem.getAsteroid(i));
clearCollisions(m_asteroidSystem.getAsteroid(i));
m_asteroidSystem.removeAsteroid(i);
m_projectileSystem.removeProjectile(j);
i--;
j--;
break;
}
}
}
// check ship > ship collision
for (int i = 0; i < m_spaceShipSystem.size(); i++)
{
for (int j = i + 1; j < m_spaceShipSystem.size(); j++)
{
if (i != j && m_spaceShipSystem.getSpaceShip(i).checkCollision(m_spaceShipSystem.getSpaceShip(j)))
{
m_explosionSystem.spawnExplosion(m_spaceShipSystem.getSpaceShip(i));
m_explosionSystem.spawnExplosion(m_spaceShipSystem.getSpaceShip(j));
m_spaceShipSystem.getSpaceShip(i).reset();
m_spaceShipSystem.getSpaceShip(j).reset();
}
}
// check ship > asteroid collision
for (int j = 0; j < m_asteroidSystem.size(); j++)
{
if (m_spaceShipSystem.getSpaceShip(i).checkCollision(m_asteroidSystem.getAsteroid(j)))
{
m_explosionSystem.spawnExplosion(m_spaceShipSystem.getSpaceShip(i));
m_spaceShipSystem.getSpaceShip(i).reset();
clearCollisions(m_asteroidSystem.getAsteroid(j));
m_asteroidSystem.removeAsteroid(j);
j--;
}
}
// check projectile > ship collision
for (int j = 0; j < m_projectileSystem.size(); j++)
{
if (!m_projectileSystem.getProjectile(j).getProjectileSource().Equals(m_spaceShipSystem.getSpaceShip(i)) &&
m_projectileSystem.getProjectile(j).checkCollision(m_spaceShipSystem.getSpaceShip(i)))
{
m_scoreSystem.addPoints(m_projectileSystem.getProjectile(j).getProjectileSource(), ScoreType.SpaceShip);
m_explosionSystem.spawnExplosion(m_spaceShipSystem.getSpaceShip(i));
m_spaceShipSystem.getSpaceShip(i).reset();
m_projectileSystem.removeProjectile(j);
j--;
}
}
}
}