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hourglass.html
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hourglass.html
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<!DOCTYPE html>
<html lang="ko">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
p {
font-family: "Courier New", Courier, monospace;
font-size: 14px;
}
</style>
</head>
<body>
<h1>모래시계 그리기</h1>
<p id="clock"> </p>
</body>
<script>
var hg = {time: 0, w:21, h:23, arr: []};
var screen = document.getElementById('clock');
hg.initArray = function() {
this.arr=[];
for (var i = 0; i <this.h; i++) {
this.arr.push([]);
for (var j = 0; j < this.w; j++) {
//this.arr[i][j] = " ";
this.arr[i][j] = ".";
}
}
};
hg.drawLine = function(height, start, len, mark) {
for (var i = start; i < len; i++) {
this.arr[height][i] = mark;
}
};
hg.drawWall = function(height, left, right, m1, m2) {
this.arr[height][left] = m1;
this.arr[height][right] = m2;
};
hg.drawGlass = function() {
//draw ===
this.drawLine(0, 0, this.w, '=' );
this.drawLine(this.h - 1, 0, this.w, '=' );
//draw \/
var th = (this.h - 3) / 2;
for (var i = 1; i <= th; i++) {
console.log(i);
this.drawWall(i, i - 1, this.w - i, '\\', '/');
}
i--;
this.drawWall(i + 1, i - 1, this.w - i, '|', '|');
//draw /\
for (var i = 1; i <= th; i++) {
this.drawWall(i + th + 1, th - i , th + i, '/', '\\');
}
};
hg.init = function() {
hg.initArray();
hg.drawGlass();
};
//draw first line
hg.start = function() {
this.i = this.step;
this.arr[this.i][this.j] = "+";
this.step++;
if (this.step == this.size) {
this.stage = "middle";
this.step = 0;
this.width = Math.floor(this.size/2);
}
}
//draw triangle
hg.middle = function() {
if (this.width === 0) {
this.stage = "last";
this.step = 0;
this.height = Math.floor(this.size / 2);
return;
}
this.step++;
this.arr[this.i][this.j - this.step] = "+";
this.arr[this.i][this.j + this.step] = "+";
if (this.step === this.width) {
this.i--;
this.width--;
this.step = 0;
}
}
hg.last = function() {
this.i = this.step;
this.arr[this.i][this.j] = " ";
this.step++;
if(this.step == this.height) {
this.stage = "end";
}
}
hg.draw = function() {
var ret = "";
for (var i = 0; i < this.h; i++) {
ret += this.arr[i].join("") + "<br>\n";
}
screen.innerHTML = ret;
};
hg.next = function() {
switch(this.stage) {
case "start":
hg.start();
break;
case "middle":
hg.middle();
break;
case "last":
hg.last();
break;
default:
console.log("The end");
clearInterval(this.tid)
}
};
var go = function() {
hg.next();
hg.draw();
}
hg.init();
hg.draw();
//hg.tid = setInterval(go, 120);
</script>
</html>