{"id":9908,"date":"2024-03-14T10:19:26","date_gmt":"2024-03-14T10:19:26","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-draw-a-waveform-chart-in-the-c-language\/"},"modified":"2024-03-20T16:38:00","modified_gmt":"2024-03-20T16:38:00","slug":"how-to-draw-a-waveform-chart-in-the-c-language","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-draw-a-waveform-chart-in-the-c-language\/","title":{"rendered":"How to draw a waveform chart in the C language?"},"content":{"rendered":"<p>In C language, you can use graphics libraries to draw waveforms. Some commonly used graphics libraries include SDL, OpenGL, GTK, etc. Here is an example code using the SDL library to draw a waveform.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;SDL2\/SDL.h&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">define<\/span> SCREEN_WIDTH 800<\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">define<\/span> SCREEN_HEIGHT 600<\/span>\r\n\r\n<span class=\"hljs-type\">void<\/span> <span class=\"hljs-title function_\">drawWaveform<\/span><span class=\"hljs-params\">(SDL_Renderer* renderer)<\/span> {\r\n    <span class=\"hljs-type\">int<\/span> i;\r\n    SDL_SetRenderDrawColor(renderer, <span class=\"hljs-number\">255<\/span>, <span class=\"hljs-number\">255<\/span>, <span class=\"hljs-number\">255<\/span>, <span class=\"hljs-number\">255<\/span>); <span class=\"hljs-comment\">\/\/ \u8bbe\u7f6e\u7ed8\u5236\u989c\u8272\u4e3a\u767d\u8272<\/span>\r\n    <span class=\"hljs-keyword\">for<\/span> (i = <span class=\"hljs-number\">0<\/span>; i &lt; SCREEN_WIDTH; i++) {\r\n        <span class=\"hljs-type\">int<\/span> y = SCREEN_HEIGHT \/ <span class=\"hljs-number\">2<\/span> + <span class=\"hljs-number\">50<\/span> * <span class=\"hljs-built_in\">sin<\/span>(i \/ <span class=\"hljs-number\">20.0<\/span>); <span class=\"hljs-comment\">\/\/ \u6839\u636e\u6b63\u5f26\u51fd\u6570\u8ba1\u7b97\u6ce2\u5f62\u70b9\u7684y\u5750\u6807<\/span>\r\n        SDL_RenderDrawPoint(renderer, i, y); <span class=\"hljs-comment\">\/\/ \u7ed8\u5236\u6ce2\u5f62\u70b9<\/span>\r\n    }\r\n}\r\n\r\n<span class=\"hljs-type\">int<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">()<\/span> {\r\n    SDL_Window* window;\r\n    SDL_Renderer* renderer;\r\n\r\n    SDL_Init(SDL_INIT_VIDEO);\r\n    SDL_CreateWindowAndRenderer(SCREEN_WIDTH, SCREEN_HEIGHT, <span class=\"hljs-number\">0<\/span>, &amp;window, &amp;renderer);\r\n\r\n    SDL_SetRenderDrawColor(renderer, <span class=\"hljs-number\">0<\/span>, <span class=\"hljs-number\">0<\/span>, <span class=\"hljs-number\">0<\/span>, <span class=\"hljs-number\">255<\/span>); <span class=\"hljs-comment\">\/\/ \u8bbe\u7f6e\u80cc\u666f\u989c\u8272\u4e3a\u9ed1\u8272<\/span>\r\n    SDL_RenderClear(renderer);\r\n\r\n    drawWaveform(renderer);\r\n\r\n    SDL_RenderPresent(renderer);\r\n\r\n    SDL_Delay(<span class=\"hljs-number\">5000<\/span>); <span class=\"hljs-comment\">\/\/ \u5ef6\u65f65\u79d2<\/span>\r\n\r\n    SDL_DestroyRenderer(renderer);\r\n    SDL_DestroyWindow(window);\r\n    SDL_Quit();\r\n\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>The code above uses the SDL library to draw a simple sine wave graph on a window. It first initializes the SDL library and creates a window and a renderer using the SDL_Init() function. Then it draws the waveform graph on the window and finally displays it using the SDL_RenderPresent() function. Finally, it delays by 5 seconds using the SDL_Delay() function before closing the window and freeing up resources.<\/p>\n<p>It is important to note that you need to link the SDL library during compilation, you can use the following command to compile:<\/p>\n<pre class=\"post-pre\"><code>gcc -o waveform waveform.c `sdl2-config --cflags --libs`\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>In C language, you can use graphics libraries to draw waveforms. Some commonly used graphics libraries include SDL, OpenGL, GTK, etc. Here is an example code using the SDL library to draw a waveform. #include &lt;SDL2\/SDL.h&gt; #define SCREEN_WIDTH 800 #define SCREEN_HEIGHT 600 void drawWaveform(SDL_Renderer* renderer) { int i; SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255); \/\/ \u8bbe\u7f6e\u7ed8\u5236\u989c\u8272\u4e3a\u767d\u8272 [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-9908","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to draw a waveform chart in the C language? - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/how-to-draw-a-waveform-chart-in-the-c-language\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to draw a waveform chart in the C language?\" \/>\n<meta property=\"og:description\" content=\"In C language, you can use graphics libraries to draw waveforms. Some commonly used graphics libraries include SDL, OpenGL, GTK, etc. Here is an example code using the SDL library to draw a waveform. #include &lt;SDL2\/SDL.h&gt; #define SCREEN_WIDTH 800 #define SCREEN_HEIGHT 600 void drawWaveform(SDL_Renderer* renderer) { int i; SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255); \/\/ \u8bbe\u7f6e\u7ed8\u5236\u989c\u8272\u4e3a\u767d\u8272 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/how-to-draw-a-waveform-chart-in-the-c-language\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-14T10:19:26+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-20T16:38:00+00:00\" \/>\n<meta name=\"author\" content=\"Sophia Anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Sophia Anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-draw-a-waveform-chart-in-the-c-language\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-draw-a-waveform-chart-in-the-c-language\/\"},\"author\":{\"name\":\"Sophia Anderson\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/19a24313de9c988db3d69226b4a40a30\"},\"headline\":\"How to draw a waveform chart in the C language?\",\"datePublished\":\"2024-03-14T10:19:26+00:00\",\"dateModified\":\"2024-03-20T16:38:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-draw-a-waveform-chart-in-the-c-language\/\"},\"wordCount\":138,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-draw-a-waveform-chart-in-the-c-language\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/how-to-draw-a-waveform-chart-in-the-c-language\/\",\"name\":\"How to draw a waveform chart in the C language? 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