{"id":2502,"date":"2026-05-02T16:42:41","date_gmt":"2026-05-02T08:42:41","guid":{"rendered":"https:\/\/randengzhe.cn\/wordpress\/?p=2502"},"modified":"2026-05-15T13:05:20","modified_gmt":"2026-05-15T05:05:20","slug":"sfml-day3","status":"publish","type":"post","link":"https:\/\/randengzhe.cn\/wordpress\/2026\/05\/02\/sfml-day3\/","title":{"rendered":"Day3 SFML+\u76f4\u89d2\u5750\u6807+\u591a\u4e2a\u51fd\u6570\u56fe\u50cf"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\r\n<div class=\"ez-toc-title-container\">\r\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\r\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\r\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/randengzhe.cn\/wordpress\/2026\/05\/02\/sfml-day3\/#SFML_%E5%AD%A6%E4%B9%A0_%C2%B7_Day3\" >SFML \u5b66\u4e60 \u00b7 Day3<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/randengzhe.cn\/wordpress\/2026\/05\/02\/sfml-day3\/#%E4%BB%8A%E6%97%A5%E7%9B%AE%E6%A0%87\" >\u4eca\u65e5\u76ee\u6807<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/randengzhe.cn\/wordpress\/2026\/05\/02\/sfml-day3\/#%E5%9B%BE%E5%83%8F%E9%A2%84%E8%A7%88\" >\u56fe\u50cf\u9884\u89c8<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/randengzhe.cn\/wordpress\/2026\/05\/02\/sfml-day3\/#%E5%AE%8C%E6%95%B4%E4%BB%A3%E7%A0%81_day3_funccpp\" >\u5b8c\u6574\u4ee3\u7801 day3_func.cpp<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/randengzhe.cn\/wordpress\/2026\/05\/02\/sfml-day3\/#%E7%BC%96%E8%AF%91%E8%BF%90%E8%A1%8C\" >\u7f16\u8bd1\u8fd0\u884c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/randengzhe.cn\/wordpress\/2026\/05\/02\/sfml-day3\/#%E4%BB%8A%E6%97%A5%E6%A0%B8%E5%BF%83%E7%9F%A5%E8%AF%86%E7%82%B9\" >\u4eca\u65e5\u6838\u5fc3\u77e5\u8bc6\u70b9<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\r\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"SFML_%E5%AD%A6%E4%B9%A0_%C2%B7_Day3\"><\/span>SFML \u5b66\u4e60 \u00b7 Day3<span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E4%BB%8A%E6%97%A5%E7%9B%AE%E6%A0%87\"><\/span>\u4eca\u65e5\u76ee\u6807<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5c01\u88c5<strong>\u6570\u5b66\u5750\u6807 \u2194 \u5c4f\u5e55\u5750\u6807<\/strong>\u8f6c\u6362\u51fd\u6570<\/li>\n\n\n\n<li>\u540c\u65f6\u753b\uff1a\u6b63\u5f26\u3001\u4f59\u5f26\u3001\u4e8c\u6b21\u629b\u7269\u7ebf<\/li>\n\n\n\n<li>\u770b\u61c2\u591a\u51fd\u6570\u7ed8\u56fe\u903b\u8f91\uff0c\u4e3a\u4ee5\u540e\u7269\u7406\u5316\u5b66\u793a\u610f\u56fe\u6253\u5e95<\/li>\n<\/ol>\n\n\n\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%9B%BE%E5%83%8F%E9%A2%84%E8%A7%88\"><\/span>\u56fe\u50cf\u9884\u89c8<span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"820\" height=\"655\" src=\"https:\/\/randengzhe.cn\/wordpress\/wp-content\/uploads\/2026\/05\/Day3.png\" alt=\"\" class=\"wp-image-2501\" srcset=\"https:\/\/randengzhe.cn\/wordpress\/wp-content\/uploads\/2026\/05\/Day3.png 820w, https:\/\/randengzhe.cn\/wordpress\/wp-content\/uploads\/2026\/05\/Day3-300x240.png 300w, https:\/\/randengzhe.cn\/wordpress\/wp-content\/uploads\/2026\/05\/Day3-768x613.png 768w, https:\/\/randengzhe.cn\/wordpress\/wp-content\/uploads\/2026\/05\/Day3-376x300.png 376w\" sizes=\"auto, (max-width: 820px) 100vw, 820px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%AE%8C%E6%95%B4%E4%BB%A3%E7%A0%81_day3_funccpp\"><\/span>\u5b8c\u6574\u4ee3\u7801 day3_func.cpp<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;SFML\/Graphics.hpp>\n#include &lt;cmath>\n\nusing namespace std;\n\n\/\/ \u7a97\u53e3\u5c3a\u5bf8 + \u5750\u6807\u539f\u70b9\uff08\u5c4f\u5e55\u4e2d\u5fc3\uff09\nconst int WIN_W = 800;\nconst int WIN_H = 600;\nconst float OX = WIN_W \/ 2.0f;\nconst float OY = WIN_H \/ 2.0f;\n\n\/\/ \u7f29\u653e\u7cfb\u6570\uff1a1\u5355\u4f4d\u6570\u5b66\u5750\u6807 = 50\u50cf\u7d20\nconst float SCALE = 50.0f;\n\n\/\/ \u6570\u5b66\u5750\u6807 \u2192 \u5c4f\u5e55\u5750\u6807\nsf::Vector2f toScreen(float x, float y)\n{\n    return {\n        OX + x * SCALE,\n        OY - y * SCALE  \/\/ SFML Y\u5411\u4e0b\uff0c\u6570\u5b66Y\u5411\u4e0a\uff0c\u53cd\u5411\n    };\n}\n\nint main()\n{\n    sf::RenderWindow window(sf::VideoMode(WIN_W, WIN_H), L\"SFML Day3 \u591a\u51fd\u6570\u7ed8\u56fe\");\n    window.setFramerateLimit(60);\n\n    \/\/ \u989c\u8272\u5b9a\u4e49\n    sf::Color gridCol(50,50,70);\n    sf::Color axisCol(100,200,255);\n    sf::Color sinCol(255,70,70);\n    sf::Color cosCol(70,255,70);\n    sf::Color paraCol(255,255,70);\n\n    while (window.isOpen())\n    {\n        sf::Event e;\n        while (window.pollEvent(e))\n        {\n            if (e.type == sf::Event::Closed)\n                window.close();\n        }\n\n        window.clear(sf::Color(15,15,25));\n\n        \/\/ 1. \u753b\u7f51\u683c\n        for (int x = 0; x &lt;= WIN_W; x += 50)\n        {\n            sf::Vertex l&#91;] = {{{(float)x,0},gridCol}, {{(float)x,WIN_H},gridCol}};\n            window.draw(l,2,sf::Lines);\n        }\n        for (int y = 0; y &lt;= WIN_H; y += 50)\n        {\n            sf::Vertex l&#91;] = {{{0,(float)y},gridCol}, {{WIN_W,(float)y},gridCol}};\n            window.draw(l,2,sf::Lines);\n        }\n\n        \/\/ 2. \u753b\u5750\u6807\u8f74\n        sf::Vertex xAxis&#91;] = {toScreen(-8,0), toScreen(8,0)};\n        sf::Vertex yAxis&#91;] = {toScreen(0,-6), toScreen(0,6)};\n        xAxis&#91;0].color = axisCol;\n        xAxis&#91;1].color = axisCol;\n        yAxis&#91;0].color = axisCol;\n        yAxis&#91;1].color = axisCol;\n        window.draw(xAxis,2,sf::Lines);\n        window.draw(yAxis,2,sf::Lines);\n\n        \/\/ 3. \u753b\u6b63\u5f26\u51fd\u6570 y=sin(x)\n        for (float x = -7; x &lt; 7; x += 0.02f)\n        {\n            float y = sin(x);\n            sf::CircleShape p(1.4f);\n            p.setPosition(toScreen(x,y));\n            p.setFillColor(sinCol);\n            window.draw(p);\n        }\n\n        \/\/ 4. \u753b\u4f59\u5f26\u51fd\u6570 y=cos(x)\n        for (float x = -7; x &lt; 7; x += 0.02f)\n        {\n            float y = cos(x);\n            sf::CircleShape p(1.4f);\n            p.setPosition(toScreen(x,y));\n            p.setFillColor(cosCol);\n            window.draw(p);\n        }\n\n        \/\/ 5. \u753b\u629b\u7269\u7ebf y = 0.2*x*x\n        for (float x = -5; x &lt; 5; x += 0.02f)\n        {\n            float y = 0.2f * x * x;\n            sf::CircleShape p(1.4f);\n            p.setPosition(toScreen(x,y));\n            p.setFillColor(paraCol);\n            window.draw(p);\n        }\n\n        window.display();\n    }\n    return 0;\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E7%BC%96%E8%AF%91%E8%BF%90%E8%A1%8C\"><\/span>\u7f16\u8bd1\u8fd0\u884c<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Makefile \u8ffd\u52a0\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>day3: day3_func.o\n    $(CXX) $(CXXFLAGS) -o day3 day3_func.o $(LIBS)<\/code><\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u6267\u884c\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>make day3\n.\/day3<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E4%BB%8A%E6%97%A5%E6%A0%B8%E5%BF%83%E7%9F%A5%E8%AF%86%E7%82%B9\"><\/span>\u4eca\u65e5\u6838\u5fc3\u77e5\u8bc6\u70b9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5c01\u88c5 <code>toScreen()<\/code> \u7edf\u4e00\u5750\u6807\u8f6c\u6362\uff0c\u4ee5\u540e\u6240\u6709\u6570\u5b66\/\u7269\u7406\u56fe\u90fd\u590d\u7528\u5b83<\/li>\n\n\n\n<li>\u7528 <code>SCALE<\/code> \u63a7\u5236\u6574\u4f53\u653e\u5927\u7f29\u5c0f\uff0c\u6539\u4e00\u4e2a\u6570\u5168\u5c40\u751f\u6548<\/li>\n\n\n\n<li>\u540c\u65f6\u7ed8\u5236\u4e09\u6761\u4e0d\u540c\u51fd\u6570\uff0c\u7528\u989c\u8272\u533a\u5206\uff0c\u9002\u5408\u6559\u5b66\u6f14\u793a<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>SFML \u5b66\u4e60 \u00b7 Day3 \u4eca\u65e5\u76ee\u6807 \u56fe\u50cf\u9884\u89c8  &hellip;<\/p>\n","protected":false},"author":1,"featured_media":2501,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[30],"tags":[],"class_list":["post-2502","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sfml"],"jetpack_featured_media_url":"https:\/\/randengzhe.cn\/wordpress\/wp-content\/uploads\/2026\/05\/Day3.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/randengzhe.cn\/wordpress\/wp-json\/wp\/v2\/posts\/2502","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/randengzhe.cn\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/randengzhe.cn\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/randengzhe.cn\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/randengzhe.cn\/wordpress\/wp-json\/wp\/v2\/comments?post=2502"}],"version-history":[{"count":4,"href":"https:\/\/randengzhe.cn\/wordpress\/wp-json\/wp\/v2\/posts\/2502\/revisions"}],"predecessor-version":[{"id":2627,"href":"https:\/\/randengzhe.cn\/wordpress\/wp-json\/wp\/v2\/posts\/2502\/revisions\/2627"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/randengzhe.cn\/wordpress\/wp-json\/wp\/v2\/media\/2501"}],"wp:attachment":[{"href":"https:\/\/randengzhe.cn\/wordpress\/wp-json\/wp\/v2\/media?parent=2502"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/randengzhe.cn\/wordpress\/wp-json\/wp\/v2\/categories?post=2502"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/randengzhe.cn\/wordpress\/wp-json\/wp\/v2\/tags?post=2502"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}