94 lines
3.2 KiB
Swift
94 lines
3.2 KiB
Swift
//
|
|
// Nexus.swift
|
|
// FirebladeECS
|
|
//
|
|
// Created by Christian Treffs on 09.10.17.
|
|
//
|
|
|
|
public final class Nexus {
|
|
public final weak var delegate: NexusEventDelegate?
|
|
|
|
/// Main entity storage.
|
|
/// Entities are tightly packed by EntityIdentifier.
|
|
@usableFromInline final var entityStorage: UnorderedSparseSet<Entity>
|
|
|
|
/// - Key: ComponentIdentifier aka component type.
|
|
/// - Value: Array of component instances of same type (uniform).
|
|
/// New component instances are appended.
|
|
@usableFromInline final var componentsByType: [ComponentIdentifier: ManagedContiguousArray<Component>]
|
|
|
|
/// - Key: EntityIdentifier aka entity index
|
|
/// - Value: Set of unique component types (ComponentIdentifier).
|
|
/// Each element is a component identifier associated with this entity.
|
|
@usableFromInline final var componentIdsByEntity: [EntityIdentifier: Set<ComponentIdentifier>]
|
|
|
|
/// Entity ids that are currently not used.
|
|
@usableFromInline final var freeEntities: ContiguousArray<EntityIdentifier>
|
|
|
|
/// - Key: FamilyTraitSet aka component types that make up one distinct family.
|
|
/// - Value: Tightly packed EntityIdentifiers that represent the association of an entity to the family.
|
|
@usableFromInline final var familyMembersByTraits: [FamilyTraitSet: UnorderedSparseSet<EntityIdentifier>]
|
|
|
|
public init() {
|
|
entityStorage = UnorderedSparseSet<Entity>()
|
|
componentsByType = [:]
|
|
componentIdsByEntity = [:]
|
|
freeEntities = ContiguousArray<EntityIdentifier>()
|
|
familyMembersByTraits = [:]
|
|
}
|
|
|
|
public final func clear() {
|
|
var iter = entityStorage.makeIterator()
|
|
while let entity = iter.next() {
|
|
destroy(entity: entity)
|
|
}
|
|
|
|
entityStorage.removeAll()
|
|
freeEntities.removeAll()
|
|
|
|
assert(entityStorage.isEmpty)
|
|
assert(componentsByType.values.reduce(0) { $0 + $1.count } == 0)
|
|
assert(componentIdsByEntity.values.reduce(0) { $0 + $1.count } == 0)
|
|
assert(freeEntities.isEmpty)
|
|
assert(familyMembersByTraits.values.reduce(0) { $0 + $1.count } == 0)
|
|
|
|
componentsByType.removeAll()
|
|
componentIdsByEntity.removeAll()
|
|
familyMembersByTraits.removeAll()
|
|
}
|
|
|
|
deinit {
|
|
clear()
|
|
}
|
|
}
|
|
|
|
// MARK: - Equatable
|
|
extension Nexus: Equatable {
|
|
@inlinable public static func == (lhs: Nexus, rhs: Nexus) -> Bool {
|
|
return lhs.entityStorage == rhs.entityStorage &&
|
|
lhs.componentIdsByEntity == rhs.componentIdsByEntity &&
|
|
lhs.freeEntities == rhs.freeEntities &&
|
|
lhs.familyMembersByTraits == rhs.familyMembersByTraits &&
|
|
lhs.componentsByType.keys == rhs.componentsByType.keys
|
|
// NOTE: components are not equatable (yet)
|
|
}
|
|
}
|
|
|
|
// MARK: - nexus delegate
|
|
extension Nexus {
|
|
internal func notify(_ event: ECSEvent) {
|
|
delegate?.nexusEventOccurred(event)
|
|
}
|
|
|
|
internal func report(_ message: String) {
|
|
delegate?.nexusRecoverableErrorOccurred(message)
|
|
}
|
|
}
|
|
|
|
// MARK: - CustomDebugStringConvertible
|
|
extension Nexus: CustomDebugStringConvertible {
|
|
public var debugDescription: String {
|
|
return "<Nexus entities:\(numEntities) components:\(numComponents) families:\(numFamilies)>"
|
|
}
|
|
}
|