python drawing library

Hello everyone, I recently developed a GIS project. There is an important module in it that needs to draw various curves. After online search and investigation, we recommend that you use the zedgraph open-source class library. This class library can be used for desktop software or web pages. net1.x and. net2.0 are supported. This class library supports

One: PHP Create a new picture step:1 : Create canvas:$im =imagecreatetruecolor (300,80)2: Define color:$black =imagecolorallocate ($im, 0, 0, 0);3: Fill Color | text message:Imagefill ($im, 0, 0, $black);4: Create Picture:Imagepng ($im, "./data/01.png")5: Destroying images:Imagedestroy ($im);Simple example:1 //1: Create a drawing resource (canvas)2 $im=imagecreatetruecolor (300,80);3 4 //2: Create color5 $black=imagecolorallocate ($im, 0, 0, 0);6 7 /

+ = array.y*Ten;5 6SetColor (BLUE);//Set Snake color7 //Draw a snake8Rectangle (snake.x-5, Snake.y-5, Snake.x +5, Snake.y +5); 9}and write a driver .1 #include 2 #include 34typedefstructPosition//Coordinate structure5 {6 intx;7 inty;8 }pos;9 Ten Pos Snake; One Pos Array; A - intMain () - { thesnake.x = -; snake.y = -; -array.x =1; array.y =0;Initgraph (640,480); Initializing the graphical interface - while(true) - { + command (); - move ();Sleep (100); + } A

sudo apt-get install libcairo2-dev//pkg-config--cflags--libs cairo//-i/usr/include/cairo-i/usr/include/glib-2.0- I/usr/lib/x86_64-linux-gnu/glib-2.0/include-i/usr/include/pixman-1-i/usr/include/freetype2-i/usr/include/ libpng12-lcairo#include Compilation under Ubuntu:g++ ' Pkg-config--cflags Cairo ' test_cairo.cpp ' Pkg-config--libs Cairo 'Note: The above symbol is not a single quote, but the key to the left of the ESC key on the keyboard and the!/1 key.Operation Result:C + + Cairo

JS Drawing Development Library--mxgraph--[thread-line diagram. html] circuit diagram > This article links http://www.cxybl.com/html/wyzz/JavaScript_Ajax/20130620/38740.html

in the project when the PC-side payment requires the front-end through the JS way to generate a two-dimensional code, QR code content for the background of the JSON data sent overJquery.qrcode.js is a plug-in that draws two-dimensional code based on the JQuery class library, which can generate the corresponding QR code by invoking the plugin in the page. Use it to achieve two-dimensional code graphics rendering support for canvas and table two

The GD2 function library in PHP5 provides powerful drawing capabilities.After installing PHP, you can enter "http://127.0.0.1: Port number/phpinfo.php" in the address bar of the browser.Press the ENTER key to retrieve the installation information for the GD library.Let's start by demonstrating a piece of codeHeader ("Content-type:image/png");$img =imagecreate (200, 200);$BG =imagecolorallocate ($img, 12, 13

// onanimationcomplete:null }　　:chart.js A total of six big charts : In addition, There are two kinds: radar or spider, Polar area map, readers please refer to: chart.js Chinese documentsso, Here's the problem!? what about the legend of the chart ? This goods is also very commonly used in the application! After many times, find the following methods to achieve the legend section, worship a big God before the road! In addition to this, you can automatically dis

this point, you can compile:In the constructor, add:QLineSeries* line1 = new QLineSeries();for(double x=0;x10;x+=0.1){ line1->append(x,sin(x));}QChart* c = new QChart();c->addSeries(line1);ui->chart->setChart(c);The effect is as follows:SummarizeWhen using the interface designer with Qtchart, you need to add the following on the corresponding interface header file:#include Otherwise, a compile error will occur!Finish!Reference documents[1] Qt Charts 5.7.0 Installation Tutorial Http://www.jiansh

PHP uses the GD library to draw images and generate verification code images. PHP uses the GD library to draw pictures and generate verification code pictures. First, you must determine php. if the GD extension function is enabled in the ini settings, test the following print_r (gd_info (). if the following content is printed, it indicates that PHP uses the GD library