{"id":207854,"date":"2025-07-08T14:32:56","date_gmt":"2025-07-08T06:32:56","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207854\/"},"modified":"2025-07-08T14:32:56","modified_gmt":"2025-07-08T06:32:56","slug":"%e4%bb%a5%e4%b8%8b%e5%ae%9e%e7%8e%b0%e6%98%af%e5%90%a6%e4%bd%bf%e6%88%91%e7%9a%84%e4%bb%a3%e7%a0%81%e5%b9%b6%e8%a1%8c%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207854\/","title":{"rendered":"\u4ee5\u4e0b\u5b9e\u73b0\u662f\u5426\u4f7f\u6211\u7684\u4ee3\u7801\u5e76\u884c\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u4ee5\u4e0b\u5b9e\u73b0\u662f\u5426\u4f7f\u6211\u7684\u4ee3\u7801\u5e76\u884c\uff1f<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-26 09:09:35<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd\u719f\u7ec3\u8fd0\u7528\u3002\u4e0b\u9762\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u4e2aGolang\u5f00\u53d1\u5b9e\u6218\uff0c\u624b\u628a\u624b\u6559\u5927\u5bb6\u5b66\u4e60\u300a\u4ee5\u4e0b\u5b9e\u73b0\u662f\u5426\u4f7f\u6211\u7684\u4ee3\u7801\u5e76\u884c\uff1f\u300b\uff0c\u5728\u5b9e\u73b0\u529f\u80fd\u7684\u8fc7\u7a0b\u4e2d\u4e5f\u5e26\u5927\u5bb6\u91cd\u65b0\u6e29\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6e29\u6545\u800c\u77e5\u65b0\uff0c\u56de\u5934\u770b\u770b\u8bf4\u4e0d\u5b9a\u53c8\u6709\u4e0d\u4e00\u6837\u7684\u611f\u609f\uff01<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6211\u5728 go \u4e2d\u6709\u4e00\u9879\u4efb\u52a1\uff0c\u8981\u5e76\u884c\u5316\u4ee3\u7801\u7684\u7ed9\u5b9a\u5faa\u73af\u3002\u6211\u4e0d\u786e\u5b9a\u6211\u7684\u4ee3\u7801\u662f\u5426\u662f\u5e76\u884c\u7684\u3002 <\/p>\n

\u6211\u5c1d\u8bd5\u7b80\u5355\u5730\u5c06\u6570\u7ec4\u5206\u6210\u4e24\u534a\uff0c\u5e76\u5728\u4e24\u534a\u4e0a\u4f7f\u7528 go \u4f8b\u7a0b\u3002<\/p>\n

package main\n\nimport (\n    \"fmt\"\n    \"math\"\n)\n\ntype body struct {\n    x, y, vx, vy, mass float64\n    r, g, b uint\n}\n\nfunc main() {\n    var count uint\n    var radius float64\n    done := make(chan bool)\n    fmt.scan(&count, &radius)\n    bodies := make([]body, count)\n    for i := range bodies {\n        b := &bodies[i]\n        fmt.scan(&b.x, &b.y, &b.vx, &b.vy, &b.mass, &b.r, &b.g, &b.b)\n    }\n\n    updatedbodies := make([]body, count)\n    copy(updatedbodies, bodies)\n    mid := len(updatedbodies)\/2\n\n\n    go func(){\n    for i := range updatedbodies[mid:] {\n        b := &updatedbodies[i+mid]\n        for _, ob := range bodies {\n            dx, dy := ob.x - b.x, ob.y - b.y\n            if dist := math.sqrt(dx*dx + dy*dy); dist > 1 { \/\/ far enough\n                accel := 0.0000000000667 * ob.mass \/ (dist * dist * dist)\n                b.vx += accel * dx\n                b.vy += accel * dy\n            }\n        }\n        b.x += b.vx\n        b.y += b.vy\n\n    }\n    done <- true\n}()\n    go func(){\n        for i := range updatedbodies[:mid] {\n        b := &updatedbodies[i]\n        for _, ob := range bodies {\n            dx, dy := ob.x - b.x, ob.y - b.y\n            if dist := math.sqrt(dx*dx + dy*dy); dist > 1 { \/\/ far enough\n                accel := 0.0000000000667 * ob.mass \/ (dist * dist * dist)\n                b.vx += accel * dx\n                b.vy += accel * dy\n            }\n        }\n        b.x += b.vx\n        b.y += b.vy\n\n    }\n    done <- true\n}()\n\n    <- done\n    <- done\n    fmt.println(count)\n    fmt.println(radius)\n    for _, b := range updatedbodies {\n        fmt.println(b.x, b.y, b.vx, b.vy, b.mass, b.r, b.g, b.b)\n    }\n}\n<\/pre>\n
for i := range updatedBodies {\n        b := &updatedBodies[i]\n        for _, ob := range bodies {\n            dx, dy := ob.x - b.x, ob.y - b.y\n            if dist := math.Sqrt(dx*dx + dy*dy); dist > 1 { \/\/ far enough\n                accel := 0.0000000000667 * ob.mass \/ (dist * dist * dist)\n                b.vx += accel * dx\n                b.vy += accel * dy\n            }\n        }\n        b.x += b.vx\n        b.y += b.vy\n\n    }<\/pre>\n
\u6211\u5411\u4e00\u4f4d\u6559\u6388\u8be2\u95ee\u4e86\u4ed6\u8bf4\u6211\u5fc5\u987b\u9012\u5f52\u8fd0\u884c go \u4f8b\u7a0b\u624d\u80fd\u4f7f\u5faa\u73af\u5e76\u884c\u7684\u4ee3\u7801\u3002<\/p>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u60a8\u7684\u4ee3\u7801\u786e\u5b9e\u540c\u65f6\u8fd0\u884c*\uff0c\u4f46\u4e0d\u4e00\u5b9a\u4ee5\u975e\u5e38\u4f18\u5316\u7684\u65b9\u5f0f\u8fd0\u884c\u3002\u60a8\u57fa\u672c\u4e0a\u5df2\u5c06\u5de5\u4f5c\u8d1f\u8f7d\u4e00\u5206\u4e3a\u4e8c\uff0c\u5e76\u4e14\u540c\u65f6\u8fd0\u884c\u4e24\u534a\u3002<\/p>\n
\u8fd9\u4e0d\u662f\u771f\u7684\uff0c\u4f46\u6211\u4e0d\u77e5\u9053\u4f60\u7684\u6559\u6388\u8bf4\u7684\u5177\u4f53\u5185\u5bb9\uff0c\u6240\u4ee5\u4ed6\u53ef\u80fd\u6ca1\u6709\u5bf9\u4f60\u6492\u8c0e\u3002\u4ed6\u663e\u7136\u60f3\u5230\u4e86\u67d0\u79cd\u9012\u5f52\u89e3\u51b3\u65b9\u6848\u3002\u6211\u4e0d\u4f1a\u5728\u8fd9\u91cc\u4f7f\u7528\u9012\u5f52\uff0c\u4f46\u8fd9\u662f\u4e00\u79cd\u65b9\u6cd5\u3002<\/p>\n
\u5f88\u96be\u63d0\u4f9b\u60a8\u7684\u6559\u6388\u6b63\u5728\u5bfb\u627e\u7684\u7b54\u6848\u3002\u6700\u597d\u7684\u5efa\u8bae\u662f\u8bf7\u4f60\u7684\u6559\u6388\u89e3\u91ca\u4ed6\u7684\u610f\u56fe\u3002<\/p>\n
*\u5e76\u53d1\u4e0d\u662f\u5e76\u884c\u3002\u8bf7\u9605\u8bfb\/\u89c2\u770b\u3002<\/p>\n
\u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300a\u4ee5\u4e0b\u5b9e\u73b0\u662f\u5426\u4f7f\u6211\u7684\u4ee3\u7801\u5e76\u884c\uff1f\u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03Golang\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207854","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207854","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=207854"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207854\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207854"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207854"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207854"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}