93 lines
3.8 KiB
Swift
93 lines
3.8 KiB
Swift
//
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// Nexus.swift
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// FirebladeECS
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//
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// Created by Christian Treffs on 09.10.17.
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//
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public final class Nexus {
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/// Main entity storage.
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/// Entities are tightly packed by EntityIdentifier.
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@usableFromInline final var entityStorage: UnorderedSparseSet<EntityIdentifier, EntityIdentifier.Idx>
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/// Entity ids that are currently not used.
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let entityIdGenerator: EntityIdentifierGenerator
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/// - Key: ComponentIdentifier aka component type.
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/// - Value: Array of component instances of same type (uniform).
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/// New component instances are appended.
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@usableFromInline final var componentsByType: [ComponentIdentifier: ManagedContiguousArray<Component>]
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/// - Key: EntityIdentifier aka entity index
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/// - Value: Set of unique component types (ComponentIdentifier).
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/// Each element is a component identifier associated with this entity.
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@usableFromInline final var componentIdsByEntity: [EntityIdentifier: Set<ComponentIdentifier>]
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/// - Key: A parent entity id.
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/// - Value: Adjacency Set of all associated children.
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@usableFromInline final var childrenByParentEntity: [EntityIdentifier: Set<EntityIdentifier>]
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/// - Key: FamilyTraitSet aka component types that make up one distinct family.
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/// - Value: Tightly packed EntityIdentifiers that represent the association of an entity to the family.
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@usableFromInline final var familyMembersByTraits: [FamilyTraitSet: UnorderedSparseSet<EntityIdentifier, EntityIdentifier.Idx>]
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public final var codingStrategy: CodingStrategy
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public final weak var delegate: NexusEventDelegate?
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public convenience init() {
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self.init(entityStorage: UnorderedSparseSet<EntityIdentifier, EntityIdentifier.Idx>(),
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componentsByType: [:],
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componentsByEntity: [:],
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entityIdGenerator: EntityIdentifierGenerator(),
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familyMembersByTraits: [:],
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childrenByParentEntity: [:],
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codingStrategy: DefaultCodingStrategy())
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}
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internal init(entityStorage: UnorderedSparseSet<EntityIdentifier, EntityIdentifier.Idx>,
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componentsByType: [ComponentIdentifier: ManagedContiguousArray<Component>],
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componentsByEntity: [EntityIdentifier: Set<ComponentIdentifier>],
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entityIdGenerator: EntityIdentifierGenerator,
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familyMembersByTraits: [FamilyTraitSet: UnorderedSparseSet<EntityIdentifier, EntityIdentifier.Idx>],
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childrenByParentEntity: [EntityIdentifier: Set<EntityIdentifier>],
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codingStrategy: CodingStrategy) {
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self.entityStorage = entityStorage
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self.componentsByType = componentsByType
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self.componentIdsByEntity = componentsByEntity
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self.familyMembersByTraits = familyMembersByTraits
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self.childrenByParentEntity = childrenByParentEntity
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self.entityIdGenerator = entityIdGenerator
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self.codingStrategy = codingStrategy
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}
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deinit {
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clear()
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}
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public final func clear() {
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entityStorage.forEach { destroy(entityId: $0) }
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entityStorage.removeAll()
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componentsByType.removeAll()
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componentIdsByEntity.removeAll()
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familyMembersByTraits.removeAll()
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childrenByParentEntity.removeAll()
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}
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}
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// MARK: - CustomDebugStringConvertible
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extension Nexus: CustomDebugStringConvertible {
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public var debugDescription: String {
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"<Nexus entities:\(numEntities) components:\(numComponents) families:\(numFamilies)>"
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}
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}
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// MARK: - default coding strategy
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public struct DefaultCodingStrategy: CodingStrategy {
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public init() { }
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public func codingKey<C>(for componentType: C.Type) -> DynamicCodingKey where C: Component {
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DynamicCodingKey(stringValue: "\(C.self)").unsafelyUnwrapped
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}
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}
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