37 lines
1.2 KiB
Swift
37 lines
1.2 KiB
Swift
//
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// Nexus+Family.swift
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// FirebladeECS
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//
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// Created by Christian Treffs on 13.10.17.
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//
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extension Nexus {
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public final var numFamilies: Int {
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familyMembersByTraits.keys.count
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}
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public func canBecomeMember(_ entity: Entity, in traits: FamilyTraitSet) -> Bool {
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guard let componentIds = componentIdsByEntity[entity.identifier] else {
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assertionFailure("no component set defined for entity: \(entity)")
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return false
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}
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return traits.isMatch(components: componentIds)
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}
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public func members(withFamilyTraits traits: FamilyTraitSet) -> UnorderedSparseSet<EntityIdentifier, EntityIdentifier.Idx> {
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familyMembersByTraits[traits] ?? UnorderedSparseSet<EntityIdentifier, EntityIdentifier.Idx>()
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}
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public func isMember(_ entity: Entity, in family: FamilyTraitSet) -> Bool {
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isMember(entity.identifier, in: family)
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}
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public func isMember(_ entityId: EntityIdentifier, in family: FamilyTraitSet) -> Bool {
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isMember(entity: entityId, inFamilyWithTraits: family)
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}
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public func isMember(entity entityId: EntityIdentifier, inFamilyWithTraits traits: FamilyTraitSet) -> Bool {
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members(withFamilyTraits: traits).contains(entityId.id)
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}
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}
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