71 lines
2.4 KiB
Swift
71 lines
2.4 KiB
Swift
//
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// Nexus+FamilyUpdate.swift
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// FirebladeECS
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//
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// Created by Christian Treffs on 14.02.19.
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//
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extension Nexus {
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/// will be called on family init
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final func onFamilyInit(traits: FamilyTraitSet) {
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guard familyMembersByTraits[traits] == nil else {
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return
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}
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familyMembersByTraits[traits] = UnorderedSparseSet<EntityIdentifier, EntityIdentifier.Id>()
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update(familyMembership: traits)
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}
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final func update(familyMembership traits: FamilyTraitSet) {
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// FIXME: iterating all entities is costly for many entities
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var iter = entityStorage.makeIterator()
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while let entityId = iter.next() {
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update(membership: traits, for: entityId)
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}
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}
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final func update(familyMembership entityId: EntityIdentifier) {
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// FIXME: iterating all families is costly for many families
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var iter = familyMembersByTraits.keys.makeIterator()
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while let traits = iter.next() {
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update(membership: traits, for: entityId)
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}
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}
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final func update(membership traits: FamilyTraitSet, for entityId: EntityIdentifier) {
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guard let componentIds = componentIdsByEntity[entityId] else {
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// no components - so skip
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return
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}
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let isMember: Bool = self.isMember(entity: entityId, inFamilyWithTraits: traits)
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if !exists(entity: entityId) && isMember {
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remove(entityWithId: entityId, fromFamilyWithTraits: traits)
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return
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}
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let isMatch: Bool = traits.isMatch(components: componentIds)
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switch (isMatch, isMember) {
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case (true, false):
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add(entityWithId: entityId, toFamilyWithTraits: traits)
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delegate?.nexusEvent(FamilyMemberAdded(member: entityId, toFamily: traits))
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case (false, true):
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remove(entityWithId: entityId, fromFamilyWithTraits: traits)
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delegate?.nexusEvent(FamilyMemberRemoved(member: entityId, from: traits))
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default:
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break
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}
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}
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final func add(entityWithId entityId: EntityIdentifier, toFamilyWithTraits traits: FamilyTraitSet) {
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familyMembersByTraits[traits]!.insert(entityId, at: entityId.id)
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}
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final func remove(entityWithId entityId: EntityIdentifier, fromFamilyWithTraits traits: FamilyTraitSet) {
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familyMembersByTraits[traits]!.remove(at: entityId.id)
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}
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}
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