【文件属性】:
文件名称:实例绘制曲线。-HTML 5高级移动开发 Canvas画布PPT教程
文件大小:762KB
文件格式:PPT
更新时间:2021-04-23 12:03:54
HTML5 Canvas
实例:绘制曲线。
var canvas = document.getElementById("myCanvas");
var context = canvas.getContext("2d");
var centerX = 288;
var centerY = 160;
var radius = 75;
var startingAngle = 1.1 * Math.PI;
var endingAngle = 1.9 * Math.PI;
var counterclockwise = false;
context.arc(centerX, centerY, radius, startingAngle, endingAngle, counterclockwise);
context.lineWidth = 15;
context.strokeStyle = "black"; // line color
context.stroke();
Math.PI表示180度。
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