// Regions
#region Collision
/// Whether the entities are in collision or not
private static Boolean inCollision(Entity e1, Entity e2)
{
float radius = e1.radius + e2.radius;
// Both exist + Pythagoras circle detection
return(!e1.isDestroyed && !e2.isDestroyed && Maths.Pythagoras(e1.position, e2.position, radius));
}
private static Vector2 spawnPoint()
{
Vector2 pos;
do
{
pos = new Vector2(Maths.random.Next(10, (int)HeadWars.ScreenDimension.X - 10), Maths.random.Next(10, (int)HeadWars.ScreenDimension.Y - 10));
} while (Maths.Pythagoras(pos, Player.Instance.position, enemyRange));
return(pos);
}
/// Update
public override void Update()
{
IEnumerable <Entity> entities = EntityManager.nearEntities(position, (float)attractionRange.Value, (float)playerAttractionRange.Value);
foreach (Entity e in entities)
{
if (e is Enemy && (e as Enemy).isDestroyed)
{
// Skips this loop
continue;
}
// Bullet = Repelled | Others = Attracted
if (e is Bullet)
{
e.velocity += (e.position - position).scaleTo(.3f);
// If the player is near, the sound is played
if (Maths.Pythagoras(position, Player.Instance.position, 120))
{
Sound.blackHoleRepelling.Play(.25f, Maths.random.RandomRange(-.2f, .2f), 0);
}
}
else
{
Vector2 pos = position - e.position;
float len = pos.Length();
e.velocity += pos.scaleTo(MathHelper.Lerp(2, 0, len / (e is Player ? (float)playerAttractionRange.Value : (float)attractionRange.Value)));
if (e is Player)
{
Sound.blackHoleAttracting.Play(.15f, Maths.random.RandomRange(-.2f, .2f), 0);
}
}
}
if (explode)
{
existenceTime -= .1f;
if (existenceTime <= 0)
{
EntityManager.New(new Explosion(Graphic.explosion, position, 80f));
Sound.blackHoleExplosion.Play(.8f, Maths.random.RandomRange(-.2f, .2f), 0);
isDestroyed = true;
}
}
}
/// Handler
static void CollisionHandler()
{
/*
* Enemy x Enemy = Push
* Enemy x Bullet = A, B Die
* Enemy x BlackHole = A Die
* Enemy x Player = B Die
* Enemy x Explosion = A Die/Push
* Enemy x Asteroid = A, B Die
* BlackHole x Bullet = A Die, B Push
* BlackHole x Player = B Die
* BlackHole x Asteroid = B Die
* Explosion x Player = B Die
* Explosion x Asteroid = B Push
* Asteroid x Bullet = A, B Die
* Asteroid x Player = A Die
* Asteroid x Asteroid = A, B Push
*/
// Enemy x Enemy
for (int i = 0; i < enemies.Count; i++)
{
for (int j = i + 1; j < enemies.Count; j++)
{
if (inCollision(enemies[i], enemies[j]))
{
enemies[i].Push(enemies[j]);
enemies[j].Push(enemies[i]);
}
}
}
foreach (Enemy e in enemies)
{
if (e.isWorking)
{
// Enemy x Bullet
foreach (Bullet b in bullets)
{
if (inCollision(e, b))
{
e.onHit();
b.isDestroyed = true;
}
}
// Enemy x BlackHole
foreach (BlackHole b in blackholes)
{
if (inCollision(e, b))
{
e.onHit(true);
b.explode = true;
}
}
// Enemy x Player
if (!Player.Instance.isInvisible && inCollision(e, Player.Instance))
{
Player.Instance.Kill();
// Break because everything was destroyed
break;
}
// Enemy x Explosion (Closer = Kill, otherwise push)
foreach (Explosion x in explosions)
{
if (Maths.Pythagoras(x.position, e.position, 45))
{
if (Maths.Pythagoras(x.position, e.position, 25))
{
e.onHit(true);
}
else
{
e.Push(x);
}
}
}
// Enemy x Asteroid
foreach (Asteroid a in asteroids)
{
if (inCollision(e, a))
{
e.onHit(true);
a.inCollision(e);
}
}
}
}
foreach (BlackHole b in blackholes)
{
// BlackHole x Bullet
foreach (Bullet bu in bullets)
{
if (inCollision(b, bu))
{
b.onHit();
bu.isDestroyed = true;
}
}
// BlackHole x Player
if (!Player.Instance.isInvisible && inCollision(b, Player.Instance))
{
Player.Instance.Kill();
// Break because everything was destroyed
break;
}
// BlackHole x Asteroid
foreach (Asteroid a in asteroids)
{
if (inCollision(b, a))
{
a.inCollision(a);
}
}
}
foreach (Explosion e in explosions)
{
// Explosion x Player
if (!Player.Instance.isInvisible && Maths.Pythagoras(e.position, Player.Instance.position, 45))
{
if (SkillManager.skillData["explosion"].isActive)
{
Player.Instance.Push(e, 20);
}
else
{
Player.Instance.Kill();
}
break;
}
// Explosion x Bullet
foreach (Bullet b in bullets)
{
if (inCollision(e, b))
{
b.isDestroyed = true;
}
}
// Explosion x Asteroid
foreach (Asteroid a in asteroids)
{
if (Maths.Pythagoras(e.position, a.position, 60))
{
a.Push(e, 30);
}
}
}
foreach (Asteroid a in asteroids)
{
// Asteroid x Bullet
foreach (Bullet b in bullets)
{
if (inCollision(a, b))
{
a.inCollision(b);
b.isDestroyed = true;
}
}
// Asteroid x Player
if (!Player.Instance.isInvisible && inCollision(a, Player.Instance))
{
a.inCollision(Player.Instance);
Player.Instance.Push(a);
}
}
// Asteroid x Asteroid
for (int i = 0; i < asteroids.Count; i++)
{
for (int j = i + 1; j < asteroids.Count; j++)
{
if (inCollision(asteroids[i], asteroids[j]))
{
asteroids[i].Push(asteroids[j]);
asteroids[j].Push(asteroids[i]);
}
}
}
}
/// Get close entities
public static IEnumerable <Entity> nearEntities(Vector2 pos, float r, float playerR)
{
return(entities.Where(e => Maths.Pythagoras(pos, e.position, (e is Player ? playerR : r))));
}
