public static Entity InformModifiers(MutatingWorld world, Entity entity, Func <IModifier, IModifier> modFunc)
{
if (entity.Modifiers.Count > 0)
{
List <IModifier> newModifiers = new List <IModifier>(entity.Modifiers.Count);
for (int i = 0; i < entity.Modifiers.Count; i++)
{
var mod = entity.Modifiers[i];
mod = modFunc(mod);
if (mod != null)
{
newModifiers.Add(mod);
}
}
world.Entities[entity.ID] = new Entity(world.Entities[entity.ID], modifiers: (Maybe <ImmutableList <IModifier> >)ImmutableList.CreateRange(newModifiers));
}
return(world.Entities[entity.ID]);
}
public static Entity SimulateTimePassing(MutatingWorld world, Entity entity, int timeMS, Stopwatch watch)
{
entity = InformModifiers(world, entity, (mod) => mod.OnTicking(entity.ID, timeMS));
if (entity.Mana != entity.Attributes.MaxMana && entity.Attributes.ManaRegen > 0)
{
var newMana = (float)(entity.Mana + (double)entity.Attributes.ManaRegen * timeMS); // up precision before addition because numbers are way different
entity = new Entity(entity, mana: Math.Min(entity.Attributes.MaxMana, newMana));
world.Entities[entity.ID] = entity;
}
if (entity.Spell != null)
{
var timeRemaining = entity.Spell.CastTimeRemainingMS - timeMS;
if (timeRemaining <= 0)
{
entity.Spell.SpellEffect.OnCast(world, entity, entity.Spell.SpellTargeter.GetTargets(world));
entity = world.Entities[entity.ID]; // in case the entity was mutated
entity = new Entity(entity, spell: new Maybe <SpellInfo>(null));
}
else
{
var spell = new SpellInfo(entity.Spell.SpellCooldownID, entity.Spell.TotalCastTimeMS, timeRemaining, entity.Spell.SpellTargeter, entity.Spell.SpellEffect);
entity = new Entity(entity, spell: (Maybe <SpellInfo>)spell);
}
}
if (entity.Velocity == Vector2.Zero)
{
return(entity);
}
var loc = entity.Location + entity.Velocity * timeMS;
return(DoMoveEntity(world, entity, loc, watch));
}
/// <summary>
/// Moves the entity to the specified location with collision.
/// </summary>
/// <remarks>
/// This always assumes that after moving entities by their MTVs they won't escape the NEARBY_BOUNDS, but
/// if isLargeMovement is true it recalculates EntityNearbyIds from loc rather than reusing the existing
/// one.
/// </remarks>
/// <param name="world">The world</param>
/// <param name="entity">The entity to move</param>
/// <param name="loc">The desired location of the entity</param>
/// <param name="isLargeMovement">If the entity might intersect entities that aren't in its EntityNearbyIds</param>
/// <returns>The entity after attempting to move it to loc</returns>
public static Entity DoMoveEntity(MutatingWorld world, Entity entity, Vector2 loc, Stopwatch watch, bool isLargeMovement = false)
{
loc.X = Math.Min(Math.Max(loc.X, 0), world.Width - entity.Attributes.Bounds.AABB.Width);
loc.Y = Math.Min(Math.Max(loc.Y, 0), world.Height - entity.Attributes.Bounds.AABB.Height);
int entId = entity.ID;
HashSet <int> ignoreIds = null;
IEnumerable <int> potentialCollisionIds;
if (isLargeMovement)
{
var potColIds = new ConcurrentQueue <int>();
Parallel.ForEach(world.Entities, (value, pls, index) =>
{
if (value.Key != entId && Rect2.Intersects(value.Value.Attributes.Bounds.AABB, NEARBY_BOUNDS, value.Value.Location, loc, true))
{
potColIds.Enqueue(value.Key);
}
});
potentialCollisionIds = potColIds;
}
else
{
potentialCollisionIds = entity.NearbyEntityIds;
}
watch.Start();
while (true)
{
int collidingId = -1;
Tuple <Vector2, float> collidingMTV = null;
foreach (var potentialCollidingEntityID in potentialCollisionIds)
{
var potentialCollidingEntity = world.Entities[potentialCollidingEntityID];
if (potentialCollidingEntity.ID != entId && (ignoreIds == null || !ignoreIds.Contains(potentialCollidingEntity.ID)))
{
if (!Rect2.Intersects(entity.Attributes.Bounds.AABB, potentialCollidingEntity.Attributes.Bounds.AABB, entity.Location, potentialCollidingEntity.Location, true))
{
continue;
}
var mtv = Polygon2.IntersectMTV(entity.Attributes.Bounds, potentialCollidingEntity.Attributes.Bounds, loc, potentialCollidingEntity.Location);
if (mtv != null)
{
collidingId = potentialCollidingEntity.ID;
collidingMTV = mtv;
break;
}
}
}
;
if (collidingMTV != null)
{
if (ignoreIds == null)
{
ignoreIds = new HashSet <int>(new[] { collidingId });
}
else
{
ignoreIds.Add(collidingId);
}
loc += collidingMTV.Item1 * collidingMTV.Item2;
}
else
{
break;
}
}
watch.Stop();
var elapsed = watch.ElapsedMilliseconds;
if (elapsed > 2)
{
Console.WriteLine($"Took a long time to resolve collisions: {elapsed} ms");
}
watch.Start();
var nearbyIds = new HashSet <int>();
var keys = new List <int>(world.Entities.Keys);
foreach (var id in keys)
{
var e = world.Entities[id];
if (e.ID != entId && Rect2.Intersects(e.Attributes.Bounds.AABB, NEARBY_BOUNDS, e.Location, loc, true))
{
nearbyIds.Add(e.ID);
}
}
foreach (var oldNearby in entity.NearbyEntityIds)
{
if (!nearbyIds.Contains(oldNearby))
{
Entity oldEnt;
if (world.Entities.TryGetValue(oldNearby, out oldEnt))
{
world.Entities[oldNearby] = new Entity(oldEnt, nearby: (Maybe <ImmutableHashSet <int> >)oldEnt.NearbyEntityIds.Remove(entId));
}
}
}
foreach (var nearby in nearbyIds)
{
var ent = world.Entities[nearby];
if (!ent.NearbyEntityIds.Contains(entId))
{
world.Entities[nearby] = new Entity(ent, nearby: (Maybe <ImmutableHashSet <int> >)ent.NearbyEntityIds.Add(entId));
}
}
watch.Stop();
elapsed = watch.ElapsedMilliseconds;
if (elapsed > 3)
{
Console.WriteLine($"Took a long time to update nearby: {elapsed} ms");
}
return(new Entity(entity, location: loc, nearby: (Maybe <ImmutableHashSet <int> >)nearbyIds.ToImmutableHashSet()));
}
public static MutatingWorld SimulateTimePassing(World world, Random random, ConcurrentDictionary <WorldMutationTime, ConcurrentQueue <IWorldMutation> > mutations, int timeMS)
{
var mutating = new MutatingWorld(world.Width, world.Height, world.Entities.Count, world.Timestamp + timeMS, world.IDCounter, random);
foreach (var team in world.Teams)
{
mutating.Teams[team.Key] = new MutatingTeam(team.Key, new HashSet <int>(), team.Value.SpawnRect, team.Value.LastSpawnTime);
}
mutating.AddRange(world.Entities);
ConcurrentQueue <IWorldMutation> beforeTick;
if (mutations.TryGetValue(WorldMutationTime.BeforeEntitiesTick, out beforeTick))
{
while (beforeTick.Count > 0)
{
IWorldMutation mut;
if (beforeTick.TryDequeue(out mut))
{
mut.Apply(mutating);
}
else
{
break;
}
}
}
var watch = new Stopwatch();
var keys = new List <int>(mutating.Entities.Keys);
foreach (var id in keys)
{
mutating.Entities[id] = SimulateTimePassing(mutating, mutating.Entities[id], timeMS, watch);
watch.Reset();
}
foreach (int id in keys)
{
if (mutating.Entities[id].Health <= 0)
{
mutating.RemoveByID(id);
}
}
ConcurrentQueue <IWorldMutation> afterTick;
if (mutations.TryGetValue(WorldMutationTime.AfterEntitiesTick, out afterTick))
{
while (afterTick.Count > 0)
{
IWorldMutation mut;
if (afterTick.TryDequeue(out mut))
{
mut.Apply(mutating);
}
else
{
break;
}
}
}
return(mutating);
}
public IModifier OnHealing(MutatingWorld world, int healedID, int parentID, ref float amount)
{
return(OnHealingDelegate == null ? this : OnHealingDelegate(this, world, healedID, parentID, ref amount));
}
public IModifier OnDealingDamage(MutatingWorld world, int attackedID, int parentID, ref float amount)
{
return(OnDealingDamageDelegate == null ? this : OnDealingDamageDelegate(this, world, attackedID, parentID, ref amount));
}