MonkeyGG2
50 lines
1.5 KiB
JavaScript
50 lines
1.5 KiB
JavaScript
/**
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* @fileoverview util
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* @author Random | http://weibo.com/random
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* @date 2015-02-05
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*/
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define(function(require, exports, module) {
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"use strict";
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module.exports = {
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drawCircle : function(ctx, x, y, r, c){
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ctx.beginPath();
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ctx.arc(x, y, r, 0, 2 * Math.PI, false);
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ctx.fillStyle = c || "red";
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ctx.fill();
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},
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drawLine : function(ctx, x1, y1, x2, y2, c, w){
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ctx.strokeStyle = c || "red";
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ctx.lineWidth = w || 1
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ctx.beginPath();
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ctx.moveTo(x1, y1);
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ctx.lineTo(x2, y2);
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ctx.stroke();
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},
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drawText : function(ctx, x, y, text, size, c){
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ctx.font = size + "px Verdana";
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ctx.fillStyle = c || "red";
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ctx.fillText(text, x, y);
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},
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getTextWidth : function(ctx, x, y, text, size, c){
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ctx.font = size + "px Verdana";
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ctx.fillStyle = c || "red";
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return ctx.measureText(text).width;
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},
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getPointDistance : function(p1, p2){
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return Math.floor(Math.sqrt(Math.floor(Math.pow(p1.x - p2.x, 2)) + Math.floor(Math.pow(p1.y - p2.y, 2))));
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},
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isMobile : (/(mobile|iphone|ipod|ipad|ios|android|windows phone)/i).test(navigator.userAgent),
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isAndroid : (/android/i).test(navigator.userAgent),
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isWeixin : (/MicroMessenger/i).test(navigator.userAgent)
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};
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}); |