{"id":7538,"date":"2026-07-31T00:28:09","date_gmt":"2026-07-30T16:28:09","guid":{"rendered":"https:\/\/i007.cc\/wordpress\/?p=7538"},"modified":"2026-07-31T00:28:09","modified_gmt":"2026-07-30T16:28:09","slug":"%e4%bb%8b%e7%bb%8d%e4%b8%8b%ef%bc%9aentt","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/7538","title":{"rendered":"\u4ecb\u7ecd\u4e0b\uff1aEnTT"},"content":{"rendered":"
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EnTT \u662f\u4ec0\u4e48<\/h3>\n

EnTT \u662f Michele “skypjack” Caini \u5f00\u53d1\u7684\u4e00\u4e2a\u7eaf\u5934\u6587\u4ef6 C++17 ECS \u5e93<\/strong>\uff0c\u5168\u540d Entity-Component-System Template Library\u3002\u5b83\u662f\u76ee\u524d C++ \u6e38\u620f\u5f00\u53d1\u9886\u57df\u6700\u6d41\u884c\u7684 ECS \u5b9e\u73b0\uff0cMinecraft Bedrock Edition<\/strong>\u00a0\u5c31\u7528\u4e86\u5b83\uff0c\u6b64\u5916\u88ab\u6570\u5343\u4e2a\u6e38\u620f\u548c\u5f15\u64ce\u9879\u76ee\u91c7\u7528\u3002<\/p>\n

GitHub\uff1askypjack\/entt<\/code>\uff0cStar \u6570\u8d85\u8fc7 10k\u3002<\/p>\n

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\u548c\u4f60\u521a\u624d\u770b\u7684\u6846\u67b6\u5bf9\u6bd4<\/h3>\n

\u4f60\u521a\u624d\u770b\u7684\u662f\u624b\u5199\u7684\u7b80\u5316\u7248\uff0c\u5bf9\u7167\u7740\u770b EnTT \u4f1a\u6e05\u6670\u5f88\u591a\u3002<\/p>\n

\u76f8\u540c\u7684\u6838\u5fc3<\/strong>\uff1aSparse Set \u4f5c\u4e3a\u5e95\u5c42\u6570\u636e\u7ed3\u6784\uff0cEntity \u5e26 generation \u9632\u60ac\u7a7a\u5f15\u7528\uff0cPool \u5b58\u8fde\u7eed\u7ec4\u4ef6\u6570\u636e\u3002<\/p>\n

EnTT \u989d\u5916\u505a\u7684\u51e0\u4ef6\u91cd\u8981\u7684\u4e8b<\/strong>\uff1a<\/p>\n

1. Group \u4f18\u5316\uff08\u6700\u5173\u952e\u7684\u6027\u80fd\u7279\u6027\uff09<\/h4>\n

\u666e\u901a view \u7684\u95ee\u9898\uff1a\u8fed\u4ee3 Position \u7684 pool\uff0c\u6bcf\u4e2a entity \u8fd8\u8981\u53bb\u522b\u7684 pool \u67e5 Velocity\uff0c\u867d\u7136\u662f O(1)\uff0c\u4f46\u8fd9\u4e9b\u67e5\u8be2\u662f\u968f\u673a\u5185\u5b58\u8bbf\u95ee\u3002<\/p>\n

EnTT \u7684 Group \u628a\u9891\u7e41\u5171\u73b0\u7684\u7ec4\u4ef6\u5f3a\u5236\u6392\u5e03\u5728\u540c\u4e00\u5185\u5b58\u533a\u57df<\/strong>\uff1a<\/p>\n

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\/\/ \u58f0\u660e\u4e00\u4e2a group\uff1aPosition \u548c Velocity \u4e00\u5b9a\u4e00\u8d77\u51fa\u73b0\r\nauto group = registry.group<Position>(entt::get<Velocity>);\r\n\r\n\/\/ \u8fed\u4ee3\u65f6\uff0cPosition \u548c Velocity \u7684\u6570\u636e\u662f\u771f\u6b63\u76f8\u90bb\u7684\r\n\/\/ CPU \u4e00\u6b21 cache line \u53ef\u4ee5\u540c\u65f6\u52a0\u8f7d\u4e24\u4e2a\u7ec4\u4ef6\uff0c\u63a5\u8fd1\u96f6\u989d\u5916\u8bbf\u95ee\u5f00\u9500\r\nfor (auto entity : group) {\r\n    auto& [pos, vel] = group.get<Position, Velocity>(entity);\r\n    pos.x += vel.vx * dt;\r\n}<\/pre>\n
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\u4ee3\u4ef7\u662f Group \u4f1a\u6539\u53d8 pool \u7684\u5185\u90e8\u6392\u5217\uff0c\u6709\u4e00\u5b9a\u5efa\u7acb\u6210\u672c\uff0c\u9002\u5408\u9ad8\u9891\u8fed\u4ee3\u7684\u6838\u5fc3 System\u3002<\/p>\n
2. Signal \/ Observer \u7cfb\u7edf<\/h4>\n
\u7ec4\u4ef6\u751f\u547d\u5468\u671f\u94a9\u5b50\uff0c\u975e\u5e38\u5b9e\u7528\uff1a<\/p>\n
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\/\/ \u6bcf\u6b21\u7ed9 entity \u52a0 Health \u7ec4\u4ef6\u65f6\u89e6\u53d1\r\nregistry.on_construct<Health>().connect<&on_health_added>();\r\n\r\n\/\/ \u6bcf\u6b21 Health \u7ec4\u4ef6\u88ab\u9500\u6bc1\u65f6\u89e6\u53d1\r\nregistry.on_destroy<Health>().connect<&on_health_removed>();\r\n\r\n\/\/ \u6bcf\u6b21 Health \u88ab\u4fee\u6539\u65f6\u89e6\u53d1\r\nregistry.on_update<Health>().connect<&on_health_changed>();<\/pre>\n
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\u6e38\u620f\u91cc\u7684\u5178\u578b\u7528\u6cd5\uff1a\u52a0 Renderable \u7ec4\u4ef6\u65f6\u81ea\u52a8\u5411\u6e32\u67d3\u5668\u6ce8\u518c\uff0c\u79fb\u9664\u65f6\u81ea\u52a8\u6ce8\u9500\uff0c\u4e0d\u9700\u8981 System \u4e3b\u52a8\u8f6e\u8be2\u3002<\/p>\n
3. \u8fd0\u884c\u65f6\u7ec4\u4ef6\uff08meta \u53cd\u5c04\u7cfb\u7edf\uff09<\/h4>\n
EnTT \u5185\u7f6e\u4e86\u4e00\u5957\u8f7b\u91cf\u53cd\u5c04\u673a\u5236\uff0c\u5141\u8bb8\u5728\u8fd0\u884c\u65f6<\/strong>\u6309\u5b57\u7b26\u4e32\u540d\u79f0\u64cd\u4f5c\u7ec4\u4ef6\uff0c\u8fd9\u5728\u6e38\u620f scripting\u3001\u7f16\u8f91\u5668\u3001\u7f51\u7edc\u5e8f\u5217\u5316\u91cc\u5f88\u6709\u4ef7\u503c\uff1a<\/p>\n
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\/\/ \u6ce8\u518c\u7c7b\u578b\u4fe1\u606f\r\nentt::meta<Position>()\r\n    .type(\"Position\"_hs)\r\n    .data<&Position::x>(\"x\"_hs)\r\n    .data<&Position::y>(\"y\"_hs);\r\n\r\n\/\/ \u8fd0\u884c\u65f6\u6309\u540d\u5b57\u521b\u5efa\u548c\u64cd\u4f5c\u7ec4\u4ef6\uff08Lua \u811a\u672c\u5c42\u5e38\u7528\uff09\r\nauto type = entt::resolve(\"Position\"_hs);\r\nauto instance = type.construct();\r\ntype.data(\"x\"_hs).set(instance, 1.0f);<\/pre>\n
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4. Snapshot \/ Serialization<\/h4>\n
\u5185\u7f6e\u4e86 entity \u5feb\u7167\u548c\u6062\u590d\u673a\u5236\uff0c\u6e38\u620f\u5b58\u6863\u3001\u7f51\u7edc\u72b6\u6001\u540c\u6b65\u7684\u57fa\u7840\u8bbe\u65bd\uff1a<\/p>\n
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\/\/ \u5e8f\u5217\u5316\r\nentt::snapshot{registry}\r\n    .entities(output)\r\n    .component<Position, Velocity, Health>(output);\r\n\r\n\/\/ \u53cd\u5e8f\u5217\u5316\r\nentt::snapshot_loader{registry}\r\n    .entities(input)\r\n    .component<Position, Velocity, Health>(input);<\/pre>\n
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EnTT \u7684\u5b9e\u9645 API \u957f\u4ec0\u4e48\u6837<\/h3>\n
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#include <entt\/entt.hpp>\r\n\r\n\/\/ \u7ec4\u4ef6\uff1a\u7eaf\u6570\u636e\r\nstruct Position { float x, y; };\r\nstruct Velocity { float vx, vy; };\r\nstruct Health   { int hp; };\r\n\r\nint main() {\r\n    entt::registry registry;\r\n\r\n    \/\/ \u521b\u5efa\u5b9e\u4f53\uff0c\u94fe\u5f0f\u6dfb\u52a0\u7ec4\u4ef6\r\n    auto player = registry.create();\r\n    registry.emplace<Position>(player, 0.f, 0.f);\r\n    registry.emplace<Velocity>(player, 1.f, 0.5f);\r\n    registry.emplace<Health>  (player, 100);\r\n\r\n    \/\/ view\uff1a\u540c\u65f6\u6709 Position \u548c Velocity \u7684\u6240\u6709 entity\r\n    auto view = registry.view<Position, Velocity>();\r\n    view.each([](auto entity, Position& pos, Velocity& vel) {\r\n        pos.x += vel.vx * 0.016f;\r\n        pos.y += vel.vy * 0.016f;\r\n    });\r\n\r\n    \/\/ \u4e5f\u53ef\u4ee5\u7528 range-for\r\n    for (auto [entity, pos, vel] : view.each()) {\r\n        pos.x += vel.vx * 0.016f;\r\n    }\r\n\r\n    \/\/ \u8fd0\u884c\u65f6\u4fee\u6539\uff1a\u66ff\u6362\u7ec4\u4ef6\u5185\u5bb9\r\n    registry.patch<Health>(player, [](Health& h) { h.hp -= 10; });\r\n\r\n    \/\/ \u68c0\u67e5\u3001\u5220\u9664\r\n    if (registry.all_of<Health>(player)) {\r\n        registry.remove<Health>(player);\r\n    }\r\n\r\n    \/\/ \u9500\u6bc1 entity \u53ca\u5176\u6240\u6709\u7ec4\u4ef6\r\n    registry.destroy(player);\r\n}<\/pre>\n
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EnTT \u7684\u8bbe\u8ba1\u54f2\u5b66<\/h3>\n
\u96f6\u5f00\u9500\u62bd\u8c61<\/strong>\uff1a\u6574\u4e2a\u5e93 header-only\uff0c\u5927\u91cf\u4f7f\u7528\u6a21\u677f\uff0c\u7f16\u8bd1\u5668\u53ef\u4ee5\u5185\u8054\u6240\u6709\u4e1c\u897f\uff0c\u8fd0\u884c\u65f6\u6ca1\u6709\u865a\u51fd\u6570\u3001\u6ca1\u6709\u7c7b\u578b\u64e6\u9664\u5f00\u9500\uff08\u9664\u975e\u4f60\u7528 meta \u53cd\u5c04\uff09\u3002<\/p>\n
\u4e0d\u5f3a\u5236 System \u7ed3\u6784<\/strong>\uff1aEnTT \u53ea\u7ba1 Entity \u548c Component \u7684\u5b58\u50a8\uff0cSystem \u600e\u4e48\u5199\u5b8c\u5168\u7531\u4f60\u51b3\u5b9a\u2014\u2014\u53ef\u4ee5\u662f\u666e\u901a\u51fd\u6570\u3001\u7c7b\u3001\u534f\u7a0b\uff0c\u968f\u610f\u3002\u8fd9\u548c Unity DOTS \u90a3\u79cd\u5f3a\u5236\u00a0ISystem<\/code>\u00a0\u63a5\u53e3\u7684\u8bbe\u8ba1\u4e0d\u540c\uff0c\u66f4\u7075\u6d3b\u4e5f\u66f4\u8f7b\u91cf\u3002<\/p>\n
\u7ec4\u5408\u800c\u975e\u7ee7\u627f<\/strong>\uff1a\u8fd9\u5c31\u662f ECS \u7684\u672c\u8d28\uff0cEnTT \u628a\u5b83\u505a\u5230\u4e86 API \u5c42\u9762\u7684\u6781\u81f4\u7b80\u6d01\u3002<\/p>\n
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\u9762\u8bd5\u91cc\u600e\u4e48\u7528\u8fd9\u4e2a\u77e5\u8bc6<\/h3>\n
\u5982\u679c EA \u9762\u8bd5\u5b98\u95ee”\u4f60\u719f\u6089\u4ec0\u4e48 ECS \u6846\u67b6”\uff0c\u53ef\u4ee5\u8bf4\uff1a<\/p>\n
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“\u4e86\u89e3 EnTT \u7684\u8bbe\u8ba1\u3002\u5b83\u7684\u6838\u5fc3\u662f Sparse Set\uff0c\u517c\u987e O(1) \u67e5\u627e\u548c\u8fde\u7eed\u5185\u5b58\u8fed\u4ee3\u3002\u6211\u81ea\u5df1\u4e5f\u5b9e\u73b0\u8fc7\u7c7b\u4f3c\u7684\u7b80\u5316\u7248\uff0c\u7406\u89e3 generation \u673a\u5236\u9632\u60ac\u7a7a\u5f15\u7528\u3001Group \u4f18\u5316\u89e3\u51b3\u591a\u7ec4\u4ef6\u8fed\u4ee3 cache miss \u7684\u601d\u8def\u3002\u5b9e\u9645\u9879\u76ee\u91cc\u6211\u4eec\u7528\u7684\u662f\u81ea\u7814\u6846\u67b6\uff0c\u4f46\u8bbe\u8ba1\u601d\u8def\u4e00\u8109\u76f8\u627f\u3002”<\/p>\n<\/blockquote>\n
\u8fd9\u6837\u56de\u7b54\u65e2\u5c55\u793a\u4e86\u7406\u89e3\u6df1\u5ea6\uff0c\u53c8\u4e0d\u4f1a\u8bf4”\u6211\u7528\u8fc7\u4f46\u5176\u5b9e\u4e0d\u719f”\u3002<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
EnTT \u662f\u4ec0\u4e48 EnTT \u662f Mich<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[24],"tags":[],"class_list":["post-7538","post","type-post","status-publish","format-standard","hentry","category-value_docs"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/7538","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/comments?post=7538"}],"version-history":[{"count":0,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/7538\/revisions"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=7538"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=7538"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=7538"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}