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index.html
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| 1 |
+
<!DOCTYPE html>
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| 2 |
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<html lang="en">
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| 3 |
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<head>
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| 4 |
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<meta charset="UTF-8" />
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| 5 |
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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| 6 |
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<title>Sonicos Grapher - One File</title>
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| 7 |
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<style>
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| 8 |
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:root {
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| 9 |
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--bg: #0A0B0E;
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| 10 |
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--card: #151619;
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| 11 |
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--border: #2A2D35;
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| 12 |
+
--muted: #8E9299;
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| 13 |
+
--text: #E1E1E6;
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| 14 |
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--cyan: #00D1FF;
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| 15 |
+
--teal: #2dd4bf;
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| 16 |
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--red: #ef4444;
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| 17 |
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}
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| 18 |
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* { box-sizing: border-box; }
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| 19 |
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body {
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| 20 |
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margin: 0;
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| 21 |
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min-height: 100vh;
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| 22 |
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background: var(--bg);
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| 23 |
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color: var(--text);
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| 24 |
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font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
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| 25 |
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}
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| 26 |
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.app {
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| 27 |
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width: min(1100px, 100%);
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| 28 |
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margin: 0 auto;
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| 29 |
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padding: 24px;
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| 30 |
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display: flex;
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| 31 |
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flex-direction: column;
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| 32 |
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gap: 24px;
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| 33 |
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}
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| 34 |
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header {
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| 35 |
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display: flex;
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| 36 |
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align-items: center;
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| 37 |
+
justify-content: space-between;
|
| 38 |
+
gap: 16px;
|
| 39 |
+
border-bottom: 1px solid var(--border);
|
| 40 |
+
padding-bottom: 16px;
|
| 41 |
+
}
|
| 42 |
+
.brand { display: flex; align-items: center; gap: 12px; }
|
| 43 |
+
.logo {
|
| 44 |
+
width: 26px;
|
| 45 |
+
height: 26px;
|
| 46 |
+
border-radius: 7px;
|
| 47 |
+
background: var(--cyan);
|
| 48 |
+
box-shadow: 0 0 14px rgba(0,209,255,.7);
|
| 49 |
+
display: grid;
|
| 50 |
+
place-items: center;
|
| 51 |
+
color: var(--bg);
|
| 52 |
+
font-weight: 900;
|
| 53 |
+
}
|
| 54 |
+
h1 {
|
| 55 |
+
margin: 0;
|
| 56 |
+
font-size: 14px;
|
| 57 |
+
letter-spacing: 2px;
|
| 58 |
+
text-transform: uppercase;
|
| 59 |
+
}
|
| 60 |
+
.badges { display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-end; }
|
| 61 |
+
.badge {
|
| 62 |
+
font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
|
| 63 |
+
font-size: 11px;
|
| 64 |
+
color: var(--muted);
|
| 65 |
+
border: 1px solid var(--border);
|
| 66 |
+
border-radius: 7px;
|
| 67 |
+
padding: 6px 8px;
|
| 68 |
+
background: rgba(255,255,255,.02);
|
| 69 |
+
}
|
| 70 |
+
.live {
|
| 71 |
+
color: var(--cyan);
|
| 72 |
+
border-color: rgba(0,209,255,.35);
|
| 73 |
+
background: rgba(0,209,255,.12);
|
| 74 |
+
display: none;
|
| 75 |
+
align-items: center;
|
| 76 |
+
gap: 7px;
|
| 77 |
+
}
|
| 78 |
+
.live.active { display: flex; }
|
| 79 |
+
.pulse {
|
| 80 |
+
width: 7px;
|
| 81 |
+
height: 7px;
|
| 82 |
+
border-radius: 50%;
|
| 83 |
+
background: var(--cyan);
|
| 84 |
+
box-shadow: 0 0 7px var(--cyan);
|
| 85 |
+
animation: pulse 1s infinite alternate;
|
| 86 |
+
}
|
| 87 |
+
@keyframes pulse { from { opacity: .35; } to { opacity: 1; } }
|
| 88 |
+
|
| 89 |
+
.layout {
|
| 90 |
+
display: grid;
|
| 91 |
+
grid-template-columns: minmax(0, 3fr) minmax(190px, 1fr);
|
| 92 |
+
gap: 24px;
|
| 93 |
+
}
|
| 94 |
+
.main, .side { display: flex; flex-direction: column; gap: 16px; }
|
| 95 |
+
.card {
|
| 96 |
+
background: var(--card);
|
| 97 |
+
border: 1px solid var(--border);
|
| 98 |
+
border-radius: 16px;
|
| 99 |
+
padding: 16px;
|
| 100 |
+
box-shadow: 0 10px 30px rgba(0,0,0,.16);
|
| 101 |
+
}
|
| 102 |
+
.toolbar {
|
| 103 |
+
display: flex;
|
| 104 |
+
flex-wrap: wrap;
|
| 105 |
+
gap: 6px;
|
| 106 |
+
background: var(--bg);
|
| 107 |
+
border: 1px solid var(--border);
|
| 108 |
+
border-radius: 12px;
|
| 109 |
+
padding: 10px;
|
| 110 |
+
margin-bottom: 12px;
|
| 111 |
+
}
|
| 112 |
+
button {
|
| 113 |
+
border: 0;
|
| 114 |
+
font: inherit;
|
| 115 |
+
cursor: pointer;
|
| 116 |
+
}
|
| 117 |
+
.tool-btn, .preset-btn {
|
| 118 |
+
background: var(--card);
|
| 119 |
+
color: var(--text);
|
| 120 |
+
border: 1px solid transparent;
|
| 121 |
+
border-radius: 8px;
|
| 122 |
+
transition: .15s ease;
|
| 123 |
+
font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
|
| 124 |
+
}
|
| 125 |
+
.tool-btn {
|
| 126 |
+
min-width: 38px;
|
| 127 |
+
padding: 8px 10px;
|
| 128 |
+
font-size: 14px;
|
| 129 |
+
}
|
| 130 |
+
.tool-btn:hover, .preset-btn:hover {
|
| 131 |
+
color: var(--cyan);
|
| 132 |
+
background: #20232a;
|
| 133 |
+
border-color: rgba(0,209,255,.45);
|
| 134 |
+
}
|
| 135 |
+
.formula-wrap {
|
| 136 |
+
display: flex;
|
| 137 |
+
gap: 10px;
|
| 138 |
+
align-items: center;
|
| 139 |
+
background: var(--bg);
|
| 140 |
+
border: 1px solid var(--border);
|
| 141 |
+
border-radius: 12px;
|
| 142 |
+
padding: 12px 14px;
|
| 143 |
+
}
|
| 144 |
+
.formula-wrap:focus-within {
|
| 145 |
+
outline: 2px solid rgba(0,209,255,.7);
|
| 146 |
+
border-color: transparent;
|
| 147 |
+
}
|
| 148 |
+
#formulaInput {
|
| 149 |
+
width: 100%;
|
| 150 |
+
min-height: 44px;
|
| 151 |
+
resize: vertical;
|
| 152 |
+
background: transparent;
|
| 153 |
+
color: var(--text);
|
| 154 |
+
border: none;
|
| 155 |
+
outline: none;
|
| 156 |
+
font-size: 20px;
|
| 157 |
+
line-height: 1.35;
|
| 158 |
+
font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
|
| 159 |
+
}
|
| 160 |
+
.hint {
|
| 161 |
+
margin-top: 10px;
|
| 162 |
+
color: var(--muted);
|
| 163 |
+
font-size: 12px;
|
| 164 |
+
line-height: 1.5;
|
| 165 |
+
}
|
| 166 |
+
.error {
|
| 167 |
+
display: none;
|
| 168 |
+
margin-top: 12px;
|
| 169 |
+
padding: 12px;
|
| 170 |
+
border-radius: 10px;
|
| 171 |
+
color: #fca5a5;
|
| 172 |
+
border: 1px solid rgba(239,68,68,.5);
|
| 173 |
+
background: rgba(239,68,68,.12);
|
| 174 |
+
font-size: 13px;
|
| 175 |
+
font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
|
| 176 |
+
overflow-wrap: anywhere;
|
| 177 |
+
}
|
| 178 |
+
.error.active { display: block; }
|
| 179 |
+
|
| 180 |
+
.canvas-card {
|
| 181 |
+
position: relative;
|
| 182 |
+
overflow: hidden;
|
| 183 |
+
display: grid;
|
| 184 |
+
place-items: center;
|
| 185 |
+
padding: 0;
|
| 186 |
+
min-height: 260px;
|
| 187 |
+
background-color: var(--card);
|
| 188 |
+
background-image:
|
| 189 |
+
linear-gradient(var(--border) 1px, transparent 1px),
|
| 190 |
+
linear-gradient(90deg, var(--border) 1px, transparent 1px);
|
| 191 |
+
background-size: 40px 40px;
|
| 192 |
+
}
|
| 193 |
+
canvas {
|
| 194 |
+
display: block;
|
| 195 |
+
width: 100%;
|
| 196 |
+
height: auto;
|
| 197 |
+
max-height: 520px;
|
| 198 |
+
aspect-ratio: 2 / 1;
|
| 199 |
+
}
|
| 200 |
+
.controls { display: flex; gap: 14px; align-items: center; }
|
| 201 |
+
.primary, .secondary {
|
| 202 |
+
border-radius: 14px;
|
| 203 |
+
padding: 16px 20px;
|
| 204 |
+
text-transform: uppercase;
|
| 205 |
+
letter-spacing: 1.7px;
|
| 206 |
+
font-size: 13px;
|
| 207 |
+
font-weight: 800;
|
| 208 |
+
transition: .15s ease;
|
| 209 |
+
display: flex;
|
| 210 |
+
align-items: center;
|
| 211 |
+
justify-content: center;
|
| 212 |
+
gap: 8px;
|
| 213 |
+
}
|
| 214 |
+
.primary {
|
| 215 |
+
flex: 1;
|
| 216 |
+
background: var(--cyan);
|
| 217 |
+
color: var(--bg);
|
| 218 |
+
}
|
| 219 |
+
.primary:hover { filter: brightness(.94); }
|
| 220 |
+
.primary.stop {
|
| 221 |
+
background: var(--card);
|
| 222 |
+
color: var(--text);
|
| 223 |
+
border: 1px solid var(--border);
|
| 224 |
+
}
|
| 225 |
+
.primary.stop:hover { border-color: var(--cyan); }
|
| 226 |
+
.primary:disabled {
|
| 227 |
+
cursor: not-allowed;
|
| 228 |
+
background: var(--border);
|
| 229 |
+
color: var(--muted);
|
| 230 |
+
}
|
| 231 |
+
.secondary {
|
| 232 |
+
background: var(--bg);
|
| 233 |
+
color: var(--muted);
|
| 234 |
+
border: 1px solid var(--border);
|
| 235 |
+
}
|
| 236 |
+
.secondary:hover { border-color: var(--muted); color: var(--text); }
|
| 237 |
+
|
| 238 |
+
.side-title {
|
| 239 |
+
margin: 0 0 2px;
|
| 240 |
+
color: var(--muted);
|
| 241 |
+
font-size: 10px;
|
| 242 |
+
letter-spacing: 1.5px;
|
| 243 |
+
text-transform: uppercase;
|
| 244 |
+
font-weight: 900;
|
| 245 |
+
}
|
| 246 |
+
.preset-list {
|
| 247 |
+
display: flex;
|
| 248 |
+
flex-direction: column;
|
| 249 |
+
gap: 9px;
|
| 250 |
+
max-height: 620px;
|
| 251 |
+
overflow-y: auto;
|
| 252 |
+
padding-right: 4px;
|
| 253 |
+
}
|
| 254 |
+
.preset-btn {
|
| 255 |
+
width: 100%;
|
| 256 |
+
text-align: left;
|
| 257 |
+
padding: 11px 12px;
|
| 258 |
+
color: var(--muted);
|
| 259 |
+
border-color: var(--border);
|
| 260 |
+
background: var(--bg);
|
| 261 |
+
font-size: 12px;
|
| 262 |
+
}
|
| 263 |
+
.preset-fn {
|
| 264 |
+
display: block;
|
| 265 |
+
margin-top: 3px;
|
| 266 |
+
color: #cbd5e1;
|
| 267 |
+
opacity: .7;
|
| 268 |
+
overflow-wrap: anywhere;
|
| 269 |
+
font-size: 11px;
|
| 270 |
+
}
|
| 271 |
+
|
| 272 |
+
@media (max-width: 800px) {
|
| 273 |
+
.app { padding: 16px; }
|
| 274 |
+
header { align-items: flex-start; flex-direction: column; }
|
| 275 |
+
.layout { grid-template-columns: 1fr; }
|
| 276 |
+
.preset-list { flex-direction: row; overflow-x: auto; max-height: none; }
|
| 277 |
+
.preset-btn { min-width: 160px; }
|
| 278 |
+
.controls { flex-direction: column; }
|
| 279 |
+
.primary, .secondary { width: 100%; }
|
| 280 |
+
}
|
| 281 |
+
</style>
|
| 282 |
+
</head>
|
| 283 |
+
<body>
|
| 284 |
+
<main class="app">
|
| 285 |
+
<header>
|
| 286 |
+
<div class="brand">
|
| 287 |
+
<div class="logo">∿</div>
|
| 288 |
+
<h1>Sonicos Grapher</h1>
|
| 289 |
+
</div>
|
| 290 |
+
<div class="badges">
|
| 291 |
+
<div id="liveBadge" class="badge live"><span class="pulse"></span> STREAMING LIVE</div>
|
| 292 |
+
<div class="badge">AUDIO: POLY.SINE</div>
|
| 293 |
+
<div class="badge">ONE FILE VERSION</div>
|
| 294 |
+
</div>
|
| 295 |
+
</header>
|
| 296 |
+
|
| 297 |
+
<section class="layout">
|
| 298 |
+
<div class="main">
|
| 299 |
+
<div class="card">
|
| 300 |
+
<div id="toolbar" class="toolbar"></div>
|
| 301 |
+
<div class="formula-wrap">
|
| 302 |
+
<textarea id="formulaInput" spellcheck="false">sin(x)</textarea>
|
| 303 |
+
</div>
|
| 304 |
+
<div class="hint">
|
| 305 |
+
Use formulas such as <strong>sin(x)</strong>, <strong>x^2</strong>, <strong>x^2+y^2=25</strong>, or <strong>(x^2+y^2-25)^3-25*x^2*y^3=0</strong>.
|
| 306 |
+
</div>
|
| 307 |
+
<div id="errorBox" class="error"></div>
|
| 308 |
+
</div>
|
| 309 |
+
|
| 310 |
+
<div class="card canvas-card">
|
| 311 |
+
<canvas id="graphCanvas" width="800" height="400"></canvas>
|
| 312 |
+
</div>
|
| 313 |
+
|
| 314 |
+
<div class="controls">
|
| 315 |
+
<button id="playBtn" class="primary">▶ Initialize Stream</button>
|
| 316 |
+
<button id="resetBtn" class="secondary">↻ Reset</button>
|
| 317 |
+
</div>
|
| 318 |
+
</div>
|
| 319 |
+
|
| 320 |
+
<aside class="side">
|
| 321 |
+
<h2 class="side-title">Pattern Presets</h2>
|
| 322 |
+
<div id="presetList" class="preset-list"></div>
|
| 323 |
+
</aside>
|
| 324 |
+
</section>
|
| 325 |
+
</main>
|
| 326 |
+
|
| 327 |
+
<script>
|
| 328 |
+
const PRESETS = [
|
| 329 |
+
{ name: 'Sine', func: 'sin(x)', min: -6.28, max: 6.28, ymin: -2, ymax: 2 },
|
| 330 |
+
{ name: 'Cosine', func: 'cos(x)', min: -6.28, max: 6.28, ymin: -2, ymax: 2 },
|
| 331 |
+
{ name: 'Parabola', func: 'x^2', min: -5, max: 5, ymin: -1, ymax: 25 },
|
| 332 |
+
{ name: 'Cubic', func: 'x^3', min: -5, max: 5, ymin: -125, ymax: 125 },
|
| 333 |
+
{ name: 'Circle', func: 'x^2+y^2=25', min: -10, max: 10, ymin: -10, ymax: 10 },
|
| 334 |
+
{ name: 'Heart', func: '(x^2+y^2-25)^3-25*x^2*y^3=0', min: -10, max: 10, ymin: -10, ymax: 10 },
|
| 335 |
+
{ name: 'Ripple', func: 'sin(3*x)+0.4*sin(9*x)', min: -6.28, max: 6.28, ymin: -2, ymax: 2 },
|
| 336 |
+
{ name: 'Beat', func: 'sin(5*x)*cos(0.7*x)', min: -10, max: 10, ymin: -2, ymax: 2 },
|
| 337 |
+
{ name: 'Hyperbola', func: 'x^2-y^2=10', min: -10, max: 10, ymin: -10, ymax: 10 },
|
| 338 |
+
{ name: 'Custom', func: 'y=sin(x)*x', min: -20, max: 20, ymin: -20, ymax: 20 }
|
| 339 |
+
];
|
| 340 |
+
|
| 341 |
+
const MATH_TOOLS = [
|
| 342 |
+
['+', '+'], ['−', '-'], ['×', '*'], ['÷', '/'], ['=', '='], ['>', '>'], ['<', '<'], ['≥', '>='], ['≤', '<='],
|
| 343 |
+
['(', '('], [')', ')'], ['xⁿ', '^'], ['√', 'sqrt()'], ['frac', '()/()'], ['π', 'pi'], ['e', 'e'],
|
| 344 |
+
['sin', 'sin()'], ['cos', 'cos()'], ['tan', 'tan()'], ['|x|', 'abs()'],
|
| 345 |
+
['7', '7'], ['8', '8'], ['9', '9'], ['4', '4'], ['5', '5'], ['6', '6'], ['1', '1'], ['2', '2'], ['3', '3'], ['0', '0'], ['.', '.'], ['x', 'x'], ['y', 'y']
|
| 346 |
+
];
|
| 347 |
+
|
| 348 |
+
const CW = 800;
|
| 349 |
+
const CH = 400;
|
| 350 |
+
const OSC_COUNT = 5;
|
| 351 |
+
|
| 352 |
+
const canvas = document.getElementById('graphCanvas');
|
| 353 |
+
const ctx = canvas.getContext('2d');
|
| 354 |
+
const formulaInput = document.getElementById('formulaInput');
|
| 355 |
+
const errorBox = document.getElementById('errorBox');
|
| 356 |
+
const playBtn = document.getElementById('playBtn');
|
| 357 |
+
const resetBtn = document.getElementById('resetBtn');
|
| 358 |
+
const toolbar = document.getElementById('toolbar');
|
| 359 |
+
const presetList = document.getElementById('presetList');
|
| 360 |
+
const liveBadge = document.getElementById('liveBadge');
|
| 361 |
+
|
| 362 |
+
let isPlaying = false;
|
| 363 |
+
let rafId = 0;
|
| 364 |
+
let lastTime = 0;
|
| 365 |
+
let audioContext = null;
|
| 366 |
+
let oscs = [];
|
| 367 |
+
let gains = [];
|
| 368 |
+
|
| 369 |
+
const state = {
|
| 370 |
+
currentPix: 0,
|
| 371 |
+
lines: [],
|
| 372 |
+
fnObj: null,
|
| 373 |
+
minY: -1,
|
| 374 |
+
maxY: 1,
|
| 375 |
+
xMin: -6.28,
|
| 376 |
+
xMax: 6.28
|
| 377 |
+
};
|
| 378 |
+
|
| 379 |
+
function insertAtCursor(textarea, text) {
|
| 380 |
+
const start = textarea.selectionStart;
|
| 381 |
+
const end = textarea.selectionEnd;
|
| 382 |
+
const current = textarea.value;
|
| 383 |
+
textarea.value = current.slice(0, start) + text + current.slice(end);
|
| 384 |
+
let cursor = start + text.length;
|
| 385 |
+
if (text.endsWith('()')) cursor -= 1;
|
| 386 |
+
if (text === '()/()') cursor = start + 1;
|
| 387 |
+
textarea.focus();
|
| 388 |
+
textarea.setSelectionRange(cursor, cursor);
|
| 389 |
+
updateFormula();
|
| 390 |
+
}
|
| 391 |
+
|
| 392 |
+
MATH_TOOLS.forEach(([label, insert]) => {
|
| 393 |
+
const btn = document.createElement('button');
|
| 394 |
+
btn.className = 'tool-btn';
|
| 395 |
+
btn.textContent = label;
|
| 396 |
+
btn.addEventListener('click', () => insertAtCursor(formulaInput, insert));
|
| 397 |
+
toolbar.appendChild(btn);
|
| 398 |
+
});
|
| 399 |
+
|
| 400 |
+
PRESETS.forEach((preset) => {
|
| 401 |
+
const btn = document.createElement('button');
|
| 402 |
+
btn.className = 'preset-btn';
|
| 403 |
+
btn.innerHTML = `<strong>${preset.name}</strong><span class="preset-fn">${escapeHtml(preset.func)}</span>`;
|
| 404 |
+
btn.addEventListener('click', () => {
|
| 405 |
+
formulaInput.value = preset.func;
|
| 406 |
+
updateFormula();
|
| 407 |
+
});
|
| 408 |
+
presetList.appendChild(btn);
|
| 409 |
+
});
|
| 410 |
+
|
| 411 |
+
function escapeHtml(value) {
|
| 412 |
+
return String(value)
|
| 413 |
+
.replace(/&/g, '&')
|
| 414 |
+
.replace(/</g, '<')
|
| 415 |
+
.replace(/>/g, '>')
|
| 416 |
+
.replace(/"/g, '"')
|
| 417 |
+
.replace(/'/g, ''');
|
| 418 |
+
}
|
| 419 |
+
|
| 420 |
+
function normalizeMath(raw) {
|
| 421 |
+
let expr = String(raw || '').trim();
|
| 422 |
+
expr = expr.replace(/×/g, '*').replace(/÷/g, '/').replace(/−/g, '-').replace(/π/g, 'pi');
|
| 423 |
+
expr = expr.replace(/\s+/g, '');
|
| 424 |
+
expr = expr.replace(/\^/g, '**');
|
| 425 |
+
expr = expr.replace(/\bln\(/g, 'log(');
|
| 426 |
+
expr = expr.replace(/\|([^|]+)\|/g, 'abs($1)');
|
| 427 |
+
expr = expr.replace(/(\d|\)|x|y|pi|e)(?=(x|y|pi|e|\())/gi, '$1*');
|
| 428 |
+
expr = expr.replace(/(x|y|pi|e|\))(?=\d)/gi, '$1*');
|
| 429 |
+
expr = expr.replace(/(x|y)(?=(x|y))/gi, '$1*');
|
| 430 |
+
return expr;
|
| 431 |
+
}
|
| 432 |
+
|
| 433 |
+
function validateIdentifiers(expr) {
|
| 434 |
+
const allowed = new Set([
|
| 435 |
+
'x', 'y', 'pi', 'e', 'sin', 'cos', 'tan', 'asin', 'acos', 'atan', 'sqrt', 'abs', 'log', 'exp', 'pow',
|
| 436 |
+
'min', 'max', 'floor', 'ceil', 'round', 'sign'
|
| 437 |
+
]);
|
| 438 |
+
const tokens = expr.match(/[A-Za-z_]\w*/g) || [];
|
| 439 |
+
for (const token of tokens) {
|
| 440 |
+
if (!allowed.has(token)) throw new Error(`Unsupported token: ${token}`);
|
| 441 |
+
}
|
| 442 |
+
if (/[^0-9A-Za-z_+\-*/().,=<>&!\s]/.test(expr)) throw new Error('Unsupported character in formula');
|
| 443 |
+
}
|
| 444 |
+
|
| 445 |
+
function buildEvaluator(rawExpr) {
|
| 446 |
+
const js = normalizeMath(rawExpr);
|
| 447 |
+
validateIdentifiers(js);
|
| 448 |
+
const names = ['sin','cos','tan','asin','acos','atan','sqrt','abs','log','exp','pow','min','max','floor','ceil','round','sign','pi','e'];
|
| 449 |
+
const values = [Math.sin,Math.cos,Math.tan,Math.asin,Math.acos,Math.atan,Math.sqrt,Math.abs,Math.log,Math.exp,Math.pow,Math.min,Math.max,Math.floor,Math.ceil,Math.round,Math.sign,Math.PI,Math.E];
|
| 450 |
+
let fn;
|
| 451 |
+
try {
|
| 452 |
+
fn = new Function('x', 'y', ...names, `"use strict"; return (${js});`);
|
| 453 |
+
} catch (err) {
|
| 454 |
+
throw new Error('Invalid formula syntax');
|
| 455 |
+
}
|
| 456 |
+
return (x, y) => {
|
| 457 |
+
const value = fn(x, y, ...values);
|
| 458 |
+
if (typeof value === 'boolean') return value ? 1 : -1;
|
| 459 |
+
return Number(value);
|
| 460 |
+
};
|
| 461 |
+
}
|
| 462 |
+
|
| 463 |
+
function compileFunction(input) {
|
| 464 |
+
if (!input || !String(input).trim()) throw new Error('Empty expression');
|
| 465 |
+
const raw = String(input).trim();
|
| 466 |
+
let expr = raw;
|
| 467 |
+
let isEquation = false;
|
| 468 |
+
|
| 469 |
+
if (raw.includes('=')) {
|
| 470 |
+
const parts = raw.split('=');
|
| 471 |
+
if (parts.length !== 2) throw new Error('Multiple "=" signs are not supported');
|
| 472 |
+
expr = `(${parts[0]})-(${parts[1]})`;
|
| 473 |
+
isEquation = true;
|
| 474 |
+
}
|
| 475 |
+
|
| 476 |
+
const normalized = normalizeMath(expr);
|
| 477 |
+
const hasY = /(^|[^A-Za-z_])y([^A-Za-z_]|$)/.test(normalized);
|
| 478 |
+
const evaluator = buildEvaluator(expr);
|
| 479 |
+
const test = evaluator(1, 1);
|
| 480 |
+
if (!Number.isFinite(test) && Number.isNaN(test)) {
|
| 481 |
+
// Do not fail here because some valid formulas are undefined at x=1.
|
| 482 |
+
}
|
| 483 |
+
return { isImplicit: isEquation || hasY, eval: evaluator };
|
| 484 |
+
}
|
| 485 |
+
|
| 486 |
+
function setError(message) {
|
| 487 |
+
if (!message) {
|
| 488 |
+
errorBox.textContent = '';
|
| 489 |
+
errorBox.classList.remove('active');
|
| 490 |
+
playBtn.disabled = false;
|
| 491 |
+
} else {
|
| 492 |
+
errorBox.textContent = message;
|
| 493 |
+
errorBox.classList.add('active');
|
| 494 |
+
playBtn.disabled = true;
|
| 495 |
+
}
|
| 496 |
+
}
|
| 497 |
+
|
| 498 |
+
function getPreset(func) {
|
| 499 |
+
return PRESETS.find(p => p.func === func.trim());
|
| 500 |
+
}
|
| 501 |
+
|
| 502 |
+
function updateFormula() {
|
| 503 |
+
try {
|
| 504 |
+
const functionStr = formulaInput.value.trim();
|
| 505 |
+
if (!functionStr) {
|
| 506 |
+
state.fnObj = null;
|
| 507 |
+
state.lines = [];
|
| 508 |
+
setError(null);
|
| 509 |
+
if (isPlaying) stop();
|
| 510 |
+
renderFrame(performance.now());
|
| 511 |
+
return;
|
| 512 |
+
}
|
| 513 |
+
|
| 514 |
+
const fnObj = compileFunction(functionStr);
|
| 515 |
+
const preset = getPreset(functionStr);
|
| 516 |
+
let x0 = preset ? preset.min : -10;
|
| 517 |
+
let x1 = preset ? preset.max : 10;
|
| 518 |
+
let uY0 = preset && preset.ymin !== undefined ? preset.ymin : NaN;
|
| 519 |
+
let uY1 = preset && preset.ymax !== undefined ? preset.ymax : NaN;
|
| 520 |
+
|
| 521 |
+
if (Number.isNaN(uY0) || Number.isNaN(uY1)) {
|
| 522 |
+
if (fnObj.isImplicit) {
|
| 523 |
+
uY0 = -10;
|
| 524 |
+
uY1 = 10;
|
| 525 |
+
} else {
|
| 526 |
+
uY0 = Infinity;
|
| 527 |
+
uY1 = -Infinity;
|
| 528 |
+
for (let i = 0; i <= 500; i++) {
|
| 529 |
+
const x = x0 + (i / 500) * (x1 - x0);
|
| 530 |
+
let y = NaN;
|
| 531 |
+
try { y = fnObj.eval(x, 0); } catch (_) {}
|
| 532 |
+
if (Number.isFinite(y)) {
|
| 533 |
+
if (y < uY0) uY0 = y;
|
| 534 |
+
if (y > uY1) uY1 = y;
|
| 535 |
+
}
|
| 536 |
+
}
|
| 537 |
+
if (!Number.isFinite(uY0) || !Number.isFinite(uY1)) {
|
| 538 |
+
uY0 = -10;
|
| 539 |
+
uY1 = 10;
|
| 540 |
+
}
|
| 541 |
+
}
|
| 542 |
+
}
|
| 543 |
+
|
| 544 |
+
if (uY0 >= uY1) {
|
| 545 |
+
uY0 -= 1;
|
| 546 |
+
uY1 += 1;
|
| 547 |
+
}
|
| 548 |
+
|
| 549 |
+
const pad = (uY1 - uY0) * 0.1;
|
| 550 |
+
const rMinY = uY0 - pad;
|
| 551 |
+
const rMaxY = uY1 + pad;
|
| 552 |
+
const mapY = (y) => CH - CH * (y - rMinY) / (rMaxY - rMinY);
|
| 553 |
+
const computedLines = [];
|
| 554 |
+
|
| 555 |
+
if (fnObj.isImplicit) {
|
| 556 |
+
const cols = 220;
|
| 557 |
+
const rows = 120;
|
| 558 |
+
const grid = new Float32Array((cols + 1) * (rows + 1));
|
| 559 |
+
const dx = CW / cols;
|
| 560 |
+
const dy = CH / rows;
|
| 561 |
+
|
| 562 |
+
for (let j = 0; j <= rows; j++) {
|
| 563 |
+
const mathY = rMaxY - (j / rows) * (rMaxY - rMinY);
|
| 564 |
+
for (let i = 0; i <= cols; i++) {
|
| 565 |
+
const mathX = x0 + (i / cols) * (x1 - x0);
|
| 566 |
+
let val = NaN;
|
| 567 |
+
try { val = fnObj.eval(mathX, mathY); } catch (_) {}
|
| 568 |
+
grid[j * (cols + 1) + i] = Number.isFinite(val) ? val : NaN;
|
| 569 |
+
}
|
| 570 |
+
}
|
| 571 |
+
|
| 572 |
+
const safeDiv = (n, d) => d === 0 ? 0.5 : n / d;
|
| 573 |
+
const getPt = (i, j, edge) => {
|
| 574 |
+
const v0 = grid[j * (cols + 1) + i];
|
| 575 |
+
const v1 = grid[j * (cols + 1) + i + 1];
|
| 576 |
+
const v2 = grid[(j + 1) * (cols + 1) + i + 1];
|
| 577 |
+
const v3 = grid[(j + 1) * (cols + 1) + i];
|
| 578 |
+
let t = 0;
|
| 579 |
+
if (edge === 0) { t = safeDiv(v0, v0 - v1); return [(i + t) * dx, j * dy]; }
|
| 580 |
+
if (edge === 1) { t = safeDiv(v1, v1 - v2); return [(i + 1) * dx, (j + t) * dy]; }
|
| 581 |
+
if (edge === 2) { t = safeDiv(v3, v3 - v2); return [(i + t) * dx, (j + 1) * dy]; }
|
| 582 |
+
if (edge === 3) { t = safeDiv(v0, v0 - v3); return [i * dx, (j + t) * dy]; }
|
| 583 |
+
return [i * dx, j * dy];
|
| 584 |
+
};
|
| 585 |
+
|
| 586 |
+
const lookup = [[], [[3,2]], [[2,1]], [[3,1]], [[1,0]], [[1,0],[3,2]], [[2,0]], [[3,0]], [[0,3]], [[0,2]], [[0,1],[2,3]], [[0,1]], [[1,3]], [[1,2]], [[2,3]], []];
|
| 587 |
+
|
| 588 |
+
for (let j = 0; j < rows; j++) {
|
| 589 |
+
for (let i = 0; i < cols; i++) {
|
| 590 |
+
const v0 = grid[j * (cols + 1) + i];
|
| 591 |
+
const v1 = grid[j * (cols + 1) + i + 1];
|
| 592 |
+
const v2 = grid[(j + 1) * (cols + 1) + i + 1];
|
| 593 |
+
const v3 = grid[(j + 1) * (cols + 1) + i];
|
| 594 |
+
if (Number.isNaN(v0) || Number.isNaN(v1) || Number.isNaN(v2) || Number.isNaN(v3)) continue;
|
| 595 |
+
let c = 0;
|
| 596 |
+
if (v0 > 0) c |= 8;
|
| 597 |
+
if (v1 > 0) c |= 4;
|
| 598 |
+
if (v2 > 0) c |= 2;
|
| 599 |
+
if (v3 > 0) c |= 1;
|
| 600 |
+
if (c === 0 || c === 15) continue;
|
| 601 |
+
for (const edgePair of lookup[c]) {
|
| 602 |
+
const p1 = getPt(i, j, edgePair[0]);
|
| 603 |
+
const p2 = getPt(i, j, edgePair[1]);
|
| 604 |
+
computedLines.push([p1[0], p1[1], p2[0], p2[1]]);
|
| 605 |
+
}
|
| 606 |
+
}
|
| 607 |
+
}
|
| 608 |
+
} else {
|
| 609 |
+
let pxPrev = null;
|
| 610 |
+
let pyPrev = null;
|
| 611 |
+
for (let i = 0; i < CW; i++) {
|
| 612 |
+
const x = x0 + (i / CW) * (x1 - x0);
|
| 613 |
+
let y = NaN;
|
| 614 |
+
try { y = fnObj.eval(x, 0); } catch (_) {}
|
| 615 |
+
if (Number.isFinite(y)) {
|
| 616 |
+
const py = mapY(y);
|
| 617 |
+
if (pxPrev !== null && pyPrev !== null && Math.abs(py - pyPrev) < CH * 2) {
|
| 618 |
+
computedLines.push([pxPrev, pyPrev, i, py]);
|
| 619 |
+
}
|
| 620 |
+
pxPrev = i;
|
| 621 |
+
pyPrev = py;
|
| 622 |
+
} else {
|
| 623 |
+
pxPrev = null;
|
| 624 |
+
pyPrev = null;
|
| 625 |
+
}
|
| 626 |
+
}
|
| 627 |
+
}
|
| 628 |
+
|
| 629 |
+
state.fnObj = fnObj;
|
| 630 |
+
state.xMin = x0;
|
| 631 |
+
state.xMax = x1;
|
| 632 |
+
state.minY = uY0;
|
| 633 |
+
state.maxY = uY1;
|
| 634 |
+
state.lines = computedLines;
|
| 635 |
+
setError(null);
|
| 636 |
+
renderFrame(performance.now());
|
| 637 |
+
} catch (err) {
|
| 638 |
+
setError(err.message || 'Invalid formula');
|
| 639 |
+
if (isPlaying) stop();
|
| 640 |
+
state.fnObj = null;
|
| 641 |
+
renderFrame(performance.now());
|
| 642 |
+
}
|
| 643 |
+
}
|
| 644 |
+
|
| 645 |
+
function startAudio() {
|
| 646 |
+
if (!audioContext) audioContext = new (window.AudioContext || window.webkitAudioContext)();
|
| 647 |
+
if (audioContext.state === 'suspended') audioContext.resume();
|
| 648 |
+
stopAudio();
|
| 649 |
+
for (let i = 0; i < OSC_COUNT; i++) {
|
| 650 |
+
const osc = audioContext.createOscillator();
|
| 651 |
+
const gain = audioContext.createGain();
|
| 652 |
+
osc.type = 'sine';
|
| 653 |
+
gain.gain.value = 0;
|
| 654 |
+
osc.connect(gain);
|
| 655 |
+
gain.connect(audioContext.destination);
|
| 656 |
+
osc.start();
|
| 657 |
+
oscs.push(osc);
|
| 658 |
+
gains.push(gain);
|
| 659 |
+
}
|
| 660 |
+
}
|
| 661 |
+
|
| 662 |
+
function stopAudio() {
|
| 663 |
+
if (audioContext) {
|
| 664 |
+
const ctx = audioContext;
|
| 665 |
+
for (const gain of gains) {
|
| 666 |
+
try { gain.gain.setTargetAtTime(0, ctx.currentTime, 0.05); } catch (_) {}
|
| 667 |
+
}
|
| 668 |
+
const oldOscs = oscs.slice();
|
| 669 |
+
setTimeout(() => {
|
| 670 |
+
for (const osc of oldOscs) {
|
| 671 |
+
try { osc.stop(); osc.disconnect(); } catch (_) {}
|
| 672 |
+
}
|
| 673 |
+
}, 100);
|
| 674 |
+
}
|
| 675 |
+
oscs = [];
|
| 676 |
+
gains = [];
|
| 677 |
+
}
|
| 678 |
+
|
| 679 |
+
function updateAudioFreqs(freqs) {
|
| 680 |
+
if (!audioContext) return;
|
| 681 |
+
const activeCount = Math.min(freqs.length, OSC_COUNT);
|
| 682 |
+
const masterVol = 0.5 / (activeCount || 1);
|
| 683 |
+
for (let i = 0; i < OSC_COUNT; i++) {
|
| 684 |
+
const gain = gains[i];
|
| 685 |
+
const osc = oscs[i];
|
| 686 |
+
if (!gain || !osc) continue;
|
| 687 |
+
if (i < activeCount) {
|
| 688 |
+
osc.frequency.setTargetAtTime(freqs[i], audioContext.currentTime, 0.05);
|
| 689 |
+
gain.gain.setTargetAtTime(masterVol, audioContext.currentTime, 0.05);
|
| 690 |
+
} else {
|
| 691 |
+
gain.gain.setTargetAtTime(0, audioContext.currentTime, 0.05);
|
| 692 |
+
}
|
| 693 |
+
}
|
| 694 |
+
}
|
| 695 |
+
|
| 696 |
+
function play() {
|
| 697 |
+
if (!state.fnObj || errorBox.classList.contains('active')) return;
|
| 698 |
+
isPlaying = true;
|
| 699 |
+
state.currentPix = 0;
|
| 700 |
+
lastTime = performance.now();
|
| 701 |
+
startAudio();
|
| 702 |
+
playBtn.classList.add('stop');
|
| 703 |
+
playBtn.textContent = '■ Stop Signal';
|
| 704 |
+
liveBadge.classList.add('active');
|
| 705 |
+
if (rafId) cancelAnimationFrame(rafId);
|
| 706 |
+
rafId = requestAnimationFrame(renderFrame);
|
| 707 |
+
}
|
| 708 |
+
|
| 709 |
+
function stop() {
|
| 710 |
+
isPlaying = false;
|
| 711 |
+
stopAudio();
|
| 712 |
+
if (rafId) cancelAnimationFrame(rafId);
|
| 713 |
+
rafId = 0;
|
| 714 |
+
playBtn.classList.remove('stop');
|
| 715 |
+
playBtn.textContent = '▶ Initialize Stream';
|
| 716 |
+
liveBadge.classList.remove('active');
|
| 717 |
+
renderFrame(performance.now());
|
| 718 |
+
}
|
| 719 |
+
|
| 720 |
+
function reset() {
|
| 721 |
+
stop();
|
| 722 |
+
formulaInput.value = '';
|
| 723 |
+
state.currentPix = 0;
|
| 724 |
+
updateFormula();
|
| 725 |
+
}
|
| 726 |
+
|
| 727 |
+
function renderFrame(time) {
|
| 728 |
+
if (!ctx) return;
|
| 729 |
+
if (!lastTime) lastTime = time;
|
| 730 |
+
const dt = Math.min((time - lastTime) / 1000, 0.1);
|
| 731 |
+
lastTime = time;
|
| 732 |
+
|
| 733 |
+
const { fnObj, minY, maxY, lines } = state;
|
| 734 |
+
ctx.clearRect(0, 0, CW, CH);
|
| 735 |
+
|
| 736 |
+
const yRange = maxY === minY ? 1 : maxY - minY;
|
| 737 |
+
const pad = yRange * 0.1;
|
| 738 |
+
const rMinY = minY - pad;
|
| 739 |
+
const rMaxY = maxY + pad;
|
| 740 |
+
const mapY = (y) => CH - CH * (y - rMinY) / (rMaxY - rMinY);
|
| 741 |
+
|
| 742 |
+
ctx.strokeStyle = '#334155';
|
| 743 |
+
ctx.lineWidth = 1;
|
| 744 |
+
ctx.beginPath();
|
| 745 |
+
const zeroY = mapY(0);
|
| 746 |
+
ctx.moveTo(0, zeroY);
|
| 747 |
+
ctx.lineTo(CW, zeroY);
|
| 748 |
+
ctx.stroke();
|
| 749 |
+
|
| 750 |
+
if (fnObj) {
|
| 751 |
+
ctx.beginPath();
|
| 752 |
+
ctx.strokeStyle = '#64748b';
|
| 753 |
+
ctx.lineWidth = 2;
|
| 754 |
+
ctx.globalAlpha = 0.45;
|
| 755 |
+
for (const line of lines) {
|
| 756 |
+
ctx.moveTo(Math.floor(line[0]), Math.floor(line[1]));
|
| 757 |
+
ctx.lineTo(Math.floor(line[2]), Math.floor(line[3]));
|
| 758 |
+
}
|
| 759 |
+
ctx.stroke();
|
| 760 |
+
ctx.globalAlpha = 1;
|
| 761 |
+
|
| 762 |
+
if (isPlaying) {
|
| 763 |
+
const sweepDuration = 3.0;
|
| 764 |
+
const pxPerSec = CW / sweepDuration;
|
| 765 |
+
state.currentPix = (state.currentPix + pxPerSec * dt) % CW;
|
| 766 |
+
const sweepX = state.currentPix;
|
| 767 |
+
const targetPixels = [];
|
| 768 |
+
|
| 769 |
+
for (const line of lines) {
|
| 770 |
+
const lx0 = Math.min(line[0], line[2]);
|
| 771 |
+
const lx1 = Math.max(line[0], line[2]);
|
| 772 |
+
if (lx0 <= sweepX && lx1 >= sweepX) {
|
| 773 |
+
if (lx0 === lx1) {
|
| 774 |
+
targetPixels.push((line[1] + line[3]) / 2);
|
| 775 |
+
} else {
|
| 776 |
+
const t = (sweepX - line[0]) / (line[2] - line[0]);
|
| 777 |
+
if (t >= -0.01 && t <= 1.01) {
|
| 778 |
+
targetPixels.push(line[1] + t * (line[3] - line[1]));
|
| 779 |
+
}
|
| 780 |
+
}
|
| 781 |
+
}
|
| 782 |
+
}
|
| 783 |
+
|
| 784 |
+
ctx.beginPath();
|
| 785 |
+
ctx.moveTo(sweepX, 0);
|
| 786 |
+
ctx.lineTo(sweepX, CH);
|
| 787 |
+
ctx.strokeStyle = '#2dd4bf';
|
| 788 |
+
ctx.lineWidth = 2;
|
| 789 |
+
ctx.stroke();
|
| 790 |
+
|
| 791 |
+
targetPixels.sort((a, b) => b - a);
|
| 792 |
+
ctx.fillStyle = '#ffffff';
|
| 793 |
+
for (const yp of targetPixels.slice(0, OSC_COUNT)) {
|
| 794 |
+
ctx.beginPath();
|
| 795 |
+
ctx.arc(sweepX, yp, 5, 0, Math.PI * 2);
|
| 796 |
+
ctx.fill();
|
| 797 |
+
}
|
| 798 |
+
|
| 799 |
+
const minFreq = 160;
|
| 800 |
+
const maxFreq = 1200;
|
| 801 |
+
const mappedFreqs = targetPixels.slice(0, OSC_COUNT).map(yp => {
|
| 802 |
+
const normY = Math.max(0, Math.min(1, 1 - yp / CH));
|
| 803 |
+
return minFreq * Math.pow(maxFreq / minFreq, normY);
|
| 804 |
+
});
|
| 805 |
+
updateAudioFreqs(mappedFreqs);
|
| 806 |
+
}
|
| 807 |
+
}
|
| 808 |
+
|
| 809 |
+
if (isPlaying) rafId = requestAnimationFrame(renderFrame);
|
| 810 |
+
}
|
| 811 |
+
|
| 812 |
+
formulaInput.addEventListener('input', updateFormula);
|
| 813 |
+
playBtn.addEventListener('click', () => isPlaying ? stop() : play());
|
| 814 |
+
resetBtn.addEventListener('click', reset);
|
| 815 |
+
|
| 816 |
+
updateFormula();
|
| 817 |
+
</script>
|
| 818 |
+
</body>
|
| 819 |
+
</html>
|