-
Notifications
You must be signed in to change notification settings - Fork 1
/
Copy pathindex.html
182 lines (165 loc) · 7.38 KB
/
index.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
<!DOCTYPE html>
<head>
<link rel="stylesheet" href="css/styles.css">
<link href="https://fonts.googleapis.com/css?family=Roboto+Mono" rel="stylesheet">
<script src="js/spirograph.js"></script>
<title>Spirograph</title>
</head>
<body>
<a href="https://github.com/faishasj/spirograph" target="_blank" class="github-corner" aria-label="View source on Github"><svg width="80" height="80" viewBox="0 0 250 250" style="fill:#fff; color:#151513; position: absolute; top: 0; border: 0; left: 0; transform: scale(-1, 1);" aria-hidden="true"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path></svg></a><style>.github-corner:hover .octo-arm{animation:octocat-wave 560ms ease-in-out}@keyframes octocat-wave{0%,100%{transform:rotate(0)}20%,60%{transform:rotate(-25deg)}40%,80%{transform:rotate(10deg)}}@media (max-width:500px){.github-corner:hover .octo-arm{animation:none}.github-corner .octo-arm{animation:octocat-wave 560ms ease-in-out}}</style>
<table width=100% height=100%>
<td width=30% id="menu">
<a href="index.html"><h1>Spirograph</h1></a>
<h2>A web app for visualising hypotrochoids and epitrochoids. </h2>
<form>
<input type="button" id="hypo-btn" value="Hypotrochoid" class="active" disabled>
<input type="button" id="epi-btn" value="Epitrochoid"><br>
Fixed circle radius:
<input class="textbox" id="R-input" type="number" value="320"><br>
Rolling circle radius:
<input class="textbox" id="r-input" type="number" value="105"><br>
Pen offset:
<input class="textbox" id="pen-input" type="number" value="70"><br>
<input type="checkbox" id="circle-btn" value="circles" checked> Show circles<br>
<input type="button" id="start-btn" value="Start">
<input type="button" id="pause-btn" value="Pause" class="active" disabled>
<input type="button" id="reset-btn" value="Reset"><br><br>
Save as:
<a id="png-a"><input type="button" id="png-btn" value="PNG"></a>
<a id="jpg-a"><input type="button" id="jpg-btn" value="JPEG"></a>
</form>
</td>
<td id="canvas-td" width=70%;>
<canvas id="canvas-main"></canvas>
</td>
</table>
<script>
// Get document elements
var btnHypo = document.getElementById("hypo-btn");
var btnEpi = document.getElementById("epi-btn");
var input = document.getElementById("R-input");
var inputr = document.getElementById("r-input");
var inputPen = document.getElementById("pen-input");
var btnCircles = document.getElementById("circle-btn");
var btnStart = document.getElementById("start-btn");
var btnPause = document.getElementById("pause-btn");
var btnReset = document.getElementById("reset-btn");
var aPNG = document.getElementById("png-a");
var aJPG = document.getElementById("jpg-a");
// Set up canvases
var canvasTd = document.getElementById("canvas-td");
// Main onscreen canvas
var mainCanvas = document.getElementById("canvas-main");
mainCanvas.width = canvasTd.offsetWidth;
mainCanvas.height = canvasTd.offsetHeight;
var ctxMain = mainCanvas.getContext("2d");
// Offscreen canvases to draw to main canvas
var circlesCanvas = document.createElement("canvas");
circlesCanvas.width = canvasTd.offsetWidth;
circlesCanvas.height = canvasTd.offsetHeight;
var ctxCircles = circlesCanvas.getContext("2d");
var spiroCanvas = document.createElement("canvas");
spiroCanvas.width = canvasTd.offsetWidth;
spiroCanvas.height = canvasTd.offsetHeight;
var ctxSpiro = spiroCanvas.getContext("2d");
// Global variables
var R = Number(input.value); // radius of fixed circle
var r = Number(inputr.value); // radius of rotating circle
var p = Number(inputPen.value); // pen offset
var t = 0; // angle
var speedr; // rotation speed of circle
var posr; // position of rotating circle
var posPen; // position of pen
var lastPosPen; // last position of pen
var numRotations; // number of revolutions made by rotating circle
// User selects hypotrochoid
btnHypo.addEventListener("click", function() {
btnHypo.classList.add("active");
btnHypo.disabled = true;
btnEpi.classList.remove("active");
btnEpi.disabled = false;
initSpiro();
})
// User selects epitrochoid
btnEpi.addEventListener("click", function() {
btnHypo.classList.remove("active");
btnHypo.disabled = false;
btnEpi.classList.add("active");
btnEpi.disabled = true;
initSpiro();
})
// User starts spirograph animation
btnStart.addEventListener("click", function() {
btnHypo.disabled = true;
btnEpi.disabled = true;
btnStart.classList.add("active");
btnStart.disabled = true;
btnPause.classList.remove("active");
btnPause.disabled = false;
input.disabled = true;
inputr.disabled = true;
inputPen.disabled = true;
})
// User pauses spirograph animation
btnPause.addEventListener("click", function() {
btnStart.classList.remove("active");
btnStart.disabled = false;
btnPause.classList.add("active");
btnPause.disabled = true;
})
// User resets spirograph
btnReset.addEventListener("click", function() {
btnStart.classList.remove("active");
btnStart.disabled = false;
btnPause.classList.add("active");
btnPause.disabled = true;
input.disabled = false;
inputr.disabled = false;
inputPen.disabled = false;
// Re-initialise spirograph
numPoints = 1;
ctxSpiro.clearRect(0, 0, mainCanvas.width, mainCanvas.height);
if (btnHypo.classList.contains("active")) {
btnEpi.disabled = false;
} else {
btnHypo.disabled = false;
}
initSpiro();
})
// User changes radius of fixed circle
input.addEventListener("change", function () {
R = Number(input.value);
initSpiro();
})
// User changes radius of rotating circle
inputr.addEventListener("change", function () {
r = Number(inputr.value);
initSpiro();
})
// User changes pen offset
inputPen.addEventListener("change", function () {
p = Number(inputPen.value);
initSpiro();
})
// User saves as PNG
aPNG.addEventListener("click", function () {
if (btnHypo.classList.contains("active")) {
filename = "hypo";
} else {
filename = "epi";
}
downloadSpiro(this, filename + "-" + R.toString() + "-" + r.toString() + "-" + p.toString(), "png");
})
// User saves as JPEG
aJPG.addEventListener("click", function () {
if (btnHypo.classList.contains("active")) {
filename = "hypo";
} else {
filename = "epi";
}
downloadSpiro(this, filename + "-" + R.toString() + "-" + r.toString() + "-" + p.toString(), "jpeg");
})
initSpiro();
window.requestAnimationFrame(render);
</script>
</body>