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main.js
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main.js
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(function() {
var coords, dists, nn_inds;
var render_orig, render_knn, render_isomap, render_lapeig;
window.onload = function() {
render_orig = init_view("orig", 400);
render_knn = init_view("nng", 400);
render_isomap = init_view("isomap", 400);
render_lapeig = init_view("lapeig", 400);
resetSwissRoll();
};
this.resetSwissRoll = function() {
var tic = new Date().getTime();
coords = swiss_roll(+(document.getElementById("numPoints").value));
var toc = new Date().getTime();
console.log('swiss_roll:', toc-tic);
render_orig(scatter(coords));
setTimeout(resetKNN, 0);
};
this.resetKNN = function() {
var tic = new Date().getTime();
var tmp = knn(coords, +(document.getElementById("knn").value));
var toc = new Date().getTime();
console.log('knn:', toc-tic);
nn_inds = tmp[0];
dists = tmp[1];
render_knn(scatter(coords, nn_inds));
setTimeout(resetIsomap, 0);
setTimeout(resetLapeig, 0);
};
this.resetIsomap = function() {
var tic = new Date().getTime();
var emb = isomap(nn_inds, dists, 2);
var toc = new Date().getTime();
console.log('isomap:', toc-tic);
scale_dimensions(emb, 50);
render_isomap(scatter(emb, nn_inds));
}
this.resetLapeig = function() {
var tic = new Date().getTime();
var emb = lapeig(nn_inds, dists, 2);
var toc = new Date().getTime();
console.log('lapeig:', toc-tic);
scale_dimensions(emb, 50);
render_lapeig(scatter(emb, nn_inds));
}
function init_view(elt_id, size) {
var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera(45, 1, 1, 10000);
camera.position.z = 150;
var renderer = new THREE.WebGLRenderer({antialias: true});
renderer.setSize(size, size);
renderer.setClearColor(0xEEEEEE, 1.0);
renderer.clear();
renderer.render(scene, camera);
function draw_scene() {
renderer.clear();
camera.lookAt(scene.position);
renderer.render(scene, camera);
};
var parent_elt = document.getElementById(elt_id);
parent_elt.innerHTML = "";
parent_elt.appendChild(renderer.domElement);
function render(obj) {
var down = false, sx = 0, sy = 0;
parent_elt.onmouseup = function() { down = false; };
parent_elt.onmousedown = function(ev) {
down = true;
sx = ev.clientX;
sy = ev.clientY;
};
parent_elt.onmousemove = function(ev) {
if (!down) return;
var dx = ev.clientX - sx;
var dy = ev.clientY - sy;
obj.rotation.y += dx * 0.01;
camera.position.y += dy;
sx += dx;
sy += dy;
draw_scene();
};
// clear any existing scene contents
for (var i = scene.children.length-1; i >= 0; i--) {
scene.remove(scene.children[i]);
}
scene.add(obj);
draw_scene();
};
return render;
}
}).call(this);