96 lines
2.9 KiB
Swift
96 lines
2.9 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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/// entity id ^ component identifier hash
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public typealias EntityComponentHash = Int
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public typealias ComponentIdsByEntityIndex = Int
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public typealias ComponentTypeHash = Int // component object identifier hash value
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public typealias UniformComponents = ContiguousComponentArray
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public typealias UniformEntityIdentifiers = SparseEntityIdentifierSet
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public typealias ComponentIdentifiers = ContiguousArray<ComponentIdentifier>
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public typealias ComponentSet = Set<ComponentIdentifier>
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public typealias Entities = SparseEntitySet
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public typealias EntityIdSet = Set<EntityIdentifier>
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public typealias FamilyTraitSetHash = Int
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public typealias TraitEntityIdHash = Int
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public typealias EntityIdInFamilyIndex = Int
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public typealias TraitEntityIdHashSet = [TraitEntityIdHash: EntityIdInFamilyIndex]
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public protocol NexusDelegate: class {
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func nexusEventOccurred(_ event: ECSEvent)
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func nexusRecoverableErrorOccurred(_ message: String)
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}
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public class Nexus {
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weak var delegate: NexusDelegate?
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/// - Index: index value matching entity identifier shifted to Int
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/// - Value: each element is a entity instance
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var entityStorage: Entities
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/// - Key: component type identifier
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/// - Value: each element is a component instance of the same type (uniform). New component instances are appended.
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var componentsByType: [ComponentIdentifier: UniformComponents]
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/// - Key: entity id as index
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/// - Value: each element is a component identifier associated with this entity
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var componentIdsByEntity: [EntityIndex: SparseComponentIdentifierSet]
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/// - Values: entity ids that are currently not used
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var freeEntities: ContiguousArray<EntityIdentifier>
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var familiesByTraitHash: [FamilyTraitSetHash: Family]
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var familyMembersByTraitHash: [FamilyTraitSetHash: UniformEntityIdentifiers]
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public init() {
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entityStorage = Entities()
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componentsByType = [:]
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componentIdsByEntity = [:]
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//componentIdsByEntityLookup = [:]
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freeEntities = ContiguousArray<EntityIdentifier>()
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familiesByTraitHash = [:]
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familyMembersByTraitHash = [:]
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}
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deinit {
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for e: Entity in entityStorage {
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destroy(entity: e)
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}
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entityStorage.clear()
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freeEntities.removeAll()
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assert(entityStorage.isEmpty)
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assert(componentsByType.values.reduce(0) { $0 + $1.count } == 0)
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assert(componentIdsByEntity.values.reduce(0) { $0 + $1.count } == 0)
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assert(freeEntities.isEmpty)
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assert(familiesByTraitHash.values.reduce(0) { $0 + $1.count } == 0)
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assert(familyMembersByTraitHash.values.reduce(0) { $0 + $1.count } == 0)
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componentsByType.removeAll()
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componentIdsByEntity.removeAll()
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familiesByTraitHash.removeAll()
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familyMembersByTraitHash.removeAll()
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}
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}
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// MARK: - nexus delegate
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extension Nexus {
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func notify(_ event: ECSEvent) {
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delegate?.nexusEventOccurred(event)
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}
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func report(_ message: String) {
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delegate?.nexusRecoverableErrorOccurred(message)
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}
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}
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