40 lines
1.4 KiB
Swift
40 lines
1.4 KiB
Swift
//
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// Components4.swift
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//
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//
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// Created by Christian Treffs on 21.08.19.
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//
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public typealias Family4<A: Component, B: Component, C: Component, D: Component> = Family<Components4<A, B, C, D>>
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public struct Components4<A, B, C, D>: ComponentsProviding where A: Component, B: Component, C: Component, D: Component {
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public let componentTypes: [Component.Type]
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public init(_ types: (A.Type, B.Type, C.Type, D.Type)) {
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componentTypes = [A.self, B.self, C.self, D.self]
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}
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public static func getComponents(nexus: Nexus, entityId: EntityIdentifier) -> (A, B, C, D) {
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let compA: A = nexus.get(unsafeComponentFor: entityId)
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let compB: B = nexus.get(unsafeComponentFor: entityId)
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let compC: C = nexus.get(unsafeComponentFor: entityId)
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let compD: D = nexus.get(unsafeComponentFor: entityId)
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return (compA, compB, compC, compD)
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}
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}
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extension Nexus {
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public func family<A, B, C, D>(
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requiresAll componentA: A.Type,
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_ componentB: B.Type,
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_ componentC: C.Type,
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_ componentD: D.Type,
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excludesAll excludedComponents: Component.Type...
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) -> Family4<A, B, C, D> where A: Component, B: Component, C: Component, D: Component {
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return Family4(
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nexus: self,
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requiresAll: (componentA, componentB, componentC, componentD),
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excludesAll: excludedComponents
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)
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}
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}
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