119 lines
2.6 KiB
Swift
119 lines
2.6 KiB
Swift
//
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// Entity.swift
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// FirebladeECS
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//
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// Created by Christian Treffs on 08.10.17.
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//
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public struct Entity: UniqueEntityIdentifiable {
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public internal(set) var identifier = EntityIdentifier.invalid
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public var name: String?
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public let nexus: Nexus
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internal init(nexus: Nexus, id: EntityIdentifier, name: String? = nil) {
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self.nexus = nexus
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self.identifier = id
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self.name = name
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}
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// MARK: Equatable
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public static func == (lhs: Entity, rhs: Entity) -> Bool {
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return lhs.identifier == rhs.identifier
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}
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}
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// MARK: - number of components
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public extension Entity {
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var numComponents: Int {
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return nexus.count(components: identifier)
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}
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}
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// MARK: - has component(s)
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public extension Entity {
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func has<C>(_ type: C.Type) -> Bool where C: Component {
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return has(type.identifier)
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}
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func has(_ compId: ComponentIdentifier) -> Bool {
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return nexus.has(componentId: compId, entityIdx: identifier.index)
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}
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var hasComponents: Bool {
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return nexus.count(components: identifier) > 0
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}
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}
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// MARK: - add component(s)
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public extension Entity {
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@discardableResult
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func assign(_ components: Component...) -> Entity {
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for component: Component in components {
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assign(component)
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}
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return self
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}
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@discardableResult
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func assign(_ component: Component) -> Entity {
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nexus.assign(component: component, to: self)
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return self
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}
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@discardableResult
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func assign<C>(_ component: C) -> Entity where C: Component {
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nexus.assign(component: component, to: self)
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return self
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}
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@discardableResult
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static func += <C>(lhs: Entity, rhs: C) -> Entity where C: Component {
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return lhs.assign(rhs)
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}
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@discardableResult
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static func << <C>(lhs: Entity, rhs: C) -> Entity where C: Component {
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return lhs.assign(rhs)
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}
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}
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// MARK: - remove component(s)
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public extension Entity {
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@discardableResult
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func remove<C>(_ component: C) -> Entity where C: Component {
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return remove(component.identifier)
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}
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@discardableResult
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func remove<C>(_ compType: C.Type) -> Entity where C: Component {
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return remove(compType.identifier)
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}
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@discardableResult
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func remove(_ compId: ComponentIdentifier) -> Entity {
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nexus.remove(component: compId, from: identifier)
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return self
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}
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func clear() {
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nexus.clear(componentes: identifier)
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}
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@discardableResult
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static func -= <C>(lhs: Entity, rhs: C) -> Entity where C: Component {
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return lhs.remove(rhs)
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}
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@discardableResult
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static func -= <C>(lhs: Entity, rhs: C.Type) -> Entity where C: Component {
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return lhs.remove(rhs)
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}
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}
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// MARK: - destroy/deinit entity
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public extension Entity {
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func destroy() {
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nexus.destroy(entity: self)
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}
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}
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