运行效果: <!DOCTYPE html> <html> <head> </head> <body> <canvas id=">A drawing of someing!</canvas> <script type="text/javascript"> var drawing = document.getElementById('drawing'); if(drawing.getC…
运行效果: <!DOCTYPE html> <html> <head> </head> <body> <canvas id=">A drawing of someing!</canvas> <script type="text/javascript"> //绘制中国银行标志 var drawBoc = function(){ var drawing = document.getEl…
运行效果: <!DOCTYPE html> <html> <head> </head> <body> <canvas id=">A drawing of someing!</canvas> <script type="text/javascript"> //绘制饼图 var drawCircle = function(canvasId, data_arr, color_arr, t…
运行效果: <!DOCTYPE html> <html> <head> </head> <body> <canvas id=">A drawing of someing!</canvas> <script type="text/javascript"> var drawing = document.getElementById('drawing'); if(drawing.getC…
运行效果: <!DOCTYPE html> <html> <head> </head> <body> <canvas id=">A drawing of someing!</canvas> <script type="text/javascript"> var drawing = document.getElementById('drawing'); if(drawing.getC…
运行效果: <!DOCTYPE html> <html> <head> </head> <body> <canvas id=">A drawing of someing!</canvas> <script type="text/javascript"> var drawing = document.getElementById('drawing'); if(drawing.getC…
从上个星期开始,耳朵就一直在生病,里面长了个疙瘩,肿的一碰就疼,不能吃饭不能嗨 (┳_┳)……在此提醒各位小伙伴,最近天气炎热,一定要注意防暑上火,病来如山倒呀~ 接下来我正在喝着5块一颗的药学习canvas…… canvas(画布)是html5新增的标签元素,用来定义图形,比如图表和其他图像.<canvas>标签只是图形容器,必须使用脚本(通常为javascript)来绘制图形. canvas与svg的区别 canvas是HTML5提供的新元素<canvas>,而svg存在的历史…
1.translate(x,y):平移 将画布的坐标原点向左右方向移动x,向上下方向移动y.canvas的默认位置是在(0,0).  例子:画布原点假如落在(1,1),那么translate(10,10)就是在原点(1,1)基础上分别在x轴.y轴移动10,则原点变为(11,11).2.scale(x,y):扩大 x为水平方向的放大倍数,y为竖直方向的放大倍数.3.rotate(angel):旋转 angle指旋转的角度,顺时针旋转.4.transform():切变 所谓切变,其实就是把图像的顶部…
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>手机解锁</title> <meta name="viewport" content="width=device-width,initial-scale=1.0,user-scalable=no" /> <style> body{ t…
Canvas绘图环境中有些属于立即绘制图形方法,有些绘图方法是基于路径的. 立即绘制图形方法仅有两个strokeRect(),fillRect(),虽然strokezText(),fillText()方法也是立即绘制的,但是文本不算是图形. 基于路径的绘制系统 大多数绘制系统,如:SVG(Scalable Verctor Graphics, 可缩放的矢量图形),Adobe Illustrator等,都是基于路径的, 使用这些绘制系统时,你需要先定义一个路径,然后再对其进行描边或填充,也可以描边加…