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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
</head>
<body style="padding: 0; margin: 0;">
<div style="padding: 5px 10px; display: flex; align-items: center;">
<button onclick="createCone()" style="padding: 5px; margin-right: 20px;">
Add Cone
</button>
<button onclick="deleteActive()" style="padding: 5px; margin-right: 20px;">
Delete active
</button>
Resolution
<input
style="padding: 5px; margin-left: 20px;"
class="resolution"
type="range"
min="3" max="64" step="1"
/>
</div>
<div
class="appLists"
style="display: flex; flex-wrap: wrap; align-items: center;">
</div>
<script type="text/javascript" src="MultiCone.js">
</script>
<script type='text/javascript'>
// ----------------------------------------------------------------------
// Multi app management
// ----------------------------------------------------------------------
const coneApps = {};
let activeApp = '';
let nextAppID = 1;
// ----------------------------------------------------------------------
function getNextAppId() {
return `vtk-app-${nextAppID++}`;
}
// ----------------------------------------------------------------------
function activate(canvas) {
activeApp = '';
if (canvas) {
canvas.id = 'canvas';
canvas.style.outline = '2px solid #BF360C';
}
Object.values(coneApps).forEach(({ appId, el }) => {
if (canvas === el) {
activeApp = appId;
} else {
el.id = '';
el.style.outline = '2px solid black';;
}
});
const app = coneApps[activeApp];
updateSlider(app && app.api.getResolution());
}
// ----------------------------------------------------------------------
function createCone() {
const appId = getNextAppId();
const el = document.createElement('canvas');
el.addEventListener("webglcontextlost", (e) => e.preventDefault(), false);
el.addEventListener('mouseenter', () => activate(el));
el.classList.add('vtk-app');
el.classList.add(appId);
el.style.width = '300px';
el.style.height = '300px';
el.style.margin = '30px';
document.querySelector('.appLists').appendChild(el);
const context = {
appId,
canvas: el,
onRuntimeInitialized() {
console.log('new cone init:', appId);
},
};
activate(el);
vtkCone(context).then((runtime) => {
const api = {
stopInteractor: runtime.cwrap('stop','void',[]),
getResolution: runtime.cwrap('getConeResolution','int',[]),
setResolution: runtime.cwrap('setConeResolution','void',['int']),
};
coneApps[appId] = {
appId,
el,
api,
runtime,
}
});
}
// ----------------------------------------------------------------------
function deleteActive() {
const app = coneApps[activeApp];
if (app) {
delete coneApps[activeApp];
app.api.stopInteractor();
const el = document.querySelector(`.${activeApp}`);
document.querySelector('.appLists').removeChild(el);
}
}
// ----------------------------------------------------------------------
// Slider handling
// ----------------------------------------------------------------------
function onSliderChange(e) {
const app = coneApps[activeApp];
if (app) {
app.api.setResolution(Number(e.currentTarget.value));
}
}
// ----------------------------------------------------------------------
function updateSlider(value) {
if (value) {
document.querySelector('.resolution').value = Number(value);
}
}
// ----------------------------------------------------------------------
document.querySelector('.resolution').addEventListener('input', onSliderChange);
// ----------------------------------------------------------------------
</script>
</body>
</html>
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