canvas画弧线

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arc(x, y, radius, startRad, endRad, [anticlockwise]) 在Canvas画布上绘制以坐标点(x,y)为圆心.半么为radius的圆上的一段弧线.这段弧线的起始弧度是startRad,结束弧度是endRad.这里的弧度是以x轴正方向为基准.进行顺时针旋转的角度来计算.其中anticlockwise表示arc()绘制圆或圆弧是以顺时针还是逆时针方向开始绘制.如果其值为true表示逆时针,如果是false表示为顺时针.该参数是一个可选参数,如果没有显式设…

Android利用canvas画各种图形(点、直线、弧、圆、椭圆、文字、矩形、多边形、曲线、圆角矩形) .

1.首先说一下canvas类: Class Overview The Canvas class holds the "draw" calls. To draw something, you need 4 basic components: A Bitmap to hold the pixels, a Canvas to host the draw calls (writing into the bitmap), a drawing primitive (e.g. Rect, Path,…

Android利用canvas画各种图形及Paint用法 .

引自:http://blog.csdn.net/carlfan/article/details/8139984 1.首先说一下canvas类: Class Overview The Canvas class holds the "draw" calls. To draw something, you need 4 basic components: A Bitmap to hold the pixels, a Canvas to host the draw calls (writing…

用canvas画弧形进度条

function toCanvas(id ,progress){ //canvas进度条 var canvas = document.getElementById(id), ctx = canvas.getContext("2d"), percent = progress, //最终百分比 circleX = canvas.width / 2, //中心x坐标 circleY = canvas.height / 2, //中心y坐标 radius = 100, //圆环半径 lineW…

canvas画笑脸

Android利用canvas画各种图形

Android利用canvas画各种图形(点.直线.弧.圆.椭圆.文字.矩形.多边形.曲线.圆角矩形) 本文链接:https://blog.csdn.net/rhljiayou/article/details/72126201.首先说一下canvas类:Class OverviewThe Canvas class holds the "draw" calls. To draw something, you need 4 basic components: A Bitmap to hol…

使用javascript和canvas画月半弯

使用javascript和canvas画月半弯,月半弯好浪漫!浏览器须支持html5 查看效果:http://keleyi.com/a/bjad/8xqdm0r2.htm 以下是代码: <!doctype html> <html> <head> <title>使用javascript和canvas画月半弯-柯乐义</title> <style> canvas{display: block;border:1px dotted skybl…

canvas 画圈 demo

html代码: <canvas id="clickCanvas2" width="180" height="180" data-total="100" data-curr="75"></canvas> js代码: $(function(){ $("#clickCanvas1").canvasChart({ …

踩个猴尾不容易啊 Canvas画个猴子

踩个猴尾不容易啊 Canvas画个猴子 <!DOCTYPE html> <html> <head> <meta charset="UTF-8" /> <meta name="Keywords" content="" /> <meta name="Description" content="" /> <meta http-equi…

canvas画随机闪烁的星星

canvas画一颗星星: 规则的星星有内切圆和外切圆,每两个点之间的角度是固定的,因此可得到星星的每个点的坐标,画出星星. function drawStars(x,y,radius1,radius2,num,drawType,color){ var angle = 360/(num*2); var arr = []; for(var i=0;i<num*2;i++){ var starObj = {}; if(i%2==0){ starObj.x = x+radius1*Math.cos(i*…