我无法理解为什么我的代码不起作用, 圆圈正在绘制但不在画布的中心, 并且它比应该的大得多并且像素化一样。 任何建议,帮助非常感谢。
// safe code:
(function(global, library){
var spaceTime = function(container){
// if container is global object
if (typeof container === "object"){
var cHeight = container.innerHeight;
var cWidth = container.innerWidth;
}
// if container is a div box
else {
var cHeight = container.style.height;
var cWidth = container.style.width;
}
console.log("container is an "+typeof container);
// return unique instance each time sT is called
return new spaceTime.init(cHeight, cWidth);
}
// function constructor
spaceTime.init = function(height, width) {
this.height = height;
this.width = width;
}
// methods: override the default prototype property
spaceTime.prototype = {
checkDimensions: function() {
console.log(this.height + this.width);
console.log(this);
return this;
},
sequence: function(divide) {
// var getSize = this.getCentre(divide);
var grow = this.expand(200);
var box = this.setCanvas();
// box.classList.add("box");
document.body.appendChild(box);
// nest this in a requestAnimationFrame and pass
// the grow function to warp radius
this.drawCircle(box, grow);
return this;
},
// expands each unique instance.
expand: function(i) {
i += 1;
return i;
},
getCentre: function(axis) {
// width axis
if(axis === "x"){
console.log(this.height / 2);
return this.height / 2;
}
// height axis
else if(axis === "y"){
return this.width / 2;
}
// if undefined or the string doesn't match
else{
throw "please input an x or y axis to be proccessed";
}
},
// canvas context object and it's api methods
drawCircle: function(c, radius) {
var ctx = c.getContext("2d");
var x = this.getCentre("x");
var y = this.getCentre("y");
console.log(x);
console.log(y);
// define the arc path
ctx.beginPath();
ctx.arc(x, y, radius, 0, 2 * Math.PI, false);
ctx.fillStyle = 'green';
ctx.fill();
// stroke it
ctx.StrokeStyle = "#aaa";
ctx.stroke();
console.log(ctx);
console.log(radius);
},
// set up the canvas element
setCanvas: function() {
var c = document.createElement("canvas");
c.style.height = this.height + "px";
c.style.width = this.width + "px";
console.log("new canvas element created");
return c;
}
}
// override the prototype object with our own one.
spaceTime.init.prototype = spaceTime.prototype;
// reference and expose library to be invoked.
global.sT = spaceTime;
}(window));
// instance 1 of wormhole library
var inst1 = sT(this);
// method chaining
inst1.checkDimensions().sequence();
答案 0 :(得分:4)
你不是在这里混淆x和y轴吗?
using System;
using System.IO;
using System.IO.Compression;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
string zipPath = @"c:\example\start.zip";
string extractPath = @"c:\example\extract";
using (ZipArchive archive = ZipFile.OpenRead(zipPath))
{
foreach (ZipArchiveEntry entry in archive.Entries)
{
if (entry.FullName.EndsWith(".txt", StringComparison.OrdinalIgnoreCase))
{
entry.ExtractToFile(Path.Combine(extractPath, entry.FullName));
}
}
}
}
}
}
呃,可能,在定义画布大小时不应该使用getCentre: function(axis) {
if(axis === "x"){
return this.height / 2;
}
else if(axis === "y"){
return this.width / 2;
}
...
},
drawCircle: function(c, radius) {
...
var x = this.getCentre("x"); // will return this.height / 2
var y = this.getCentre("y"); // will return this.width / 2
console.log(x);
console.log(y);
...
}
属性。看here