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<!doctype html>
<html lang="en">
<head>
<title>face points</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<style>
html, body { margin: 0; padding: 0; font-family: sans-serif; color: white; }
.currentFace { position: absolute; bottom: 10px; right: 10px; }
</style>
</head>
<body>
<div id="container"></div>
<div class="currentFace"></div>
<script src="../js/vendor/three.min.js"></script>
<script src="../js/vendor/three.meshline.js"></script>
<script>
var container
var camera, controls, scene, renderer
var mouse = new THREE.Vector2(0.5, 0.5)
var mouseTarget = new THREE.Vector2(0.5, 0.5)
var POINT_SCALE = 1.8
var FACE_POINT_COUNT = 68
var SWAP_TIME = 500
var cubes = [], meshes = []
var faceBuffer = makeFaceBuffer()
function makeFaceBuffer() {
var a = new Array(FACE_POINT_COUNT)
for (let i = 0; i < FACE_POINT_COUNT; i++) {
a[i] = new THREE.Vector3()
}
return a
}
var last_t = 0, start_t = 0
var colors = [
0xff3333,
0xff8833,
0xffff33,
0x338833,
0x3388ff,
0x3333ff,
0x8833ff,
0xff3388,
0xffffff,
]
var swapping = false, swap_count = 0, swapFrom, swapTo, face_names, faces
init()
function choice(a) { return a[Math.floor(Math.random()*a.length)]}
function init() {
fetch("/assets/data/3dlm_0_10.json")
.then(req => req.json())
.then(data => {
face_names = Object.keys(data)
faces = face_names.map(name => recenter(data[name]))
setup()
build(faces[0])
updateFace(faces[0])
document.querySelector('.currentFace').innerHTML = face_names[0]
swapTo = faces[0]
animate()
})
}
function setup() {
container = document.getElementById("container")
camera = new THREE.PerspectiveCamera(70, window.innerWidth / window.innerHeight, 1, 10000)
camera.position.x = 0
camera.position.y = 0
camera.position.z = 300
scene = new THREE.Scene()
scene.background = new THREE.Color(0x000000)
renderer = new THREE.WebGLRenderer({ antialias: true })
renderer.setPixelRatio(window.devicePixelRatio)
renderer.setSize(window.innerWidth, window.innerHeight)
container.appendChild(renderer.domElement)
renderer.domElement.addEventListener('mousemove', onMouseMove)
renderer.domElement.addEventListener('mousedown', swap)
}
function build(points) {
var matrix = new THREE.Matrix4()
var quaternion = new THREE.Quaternion()
for (var i = 0; i < FACE_POINT_COUNT; i++) {
var p = points[i]
var geometry = new THREE.BoxBufferGeometry()
var position = new THREE.Vector3(p[0], p[1], p[2])
var rotation = new THREE.Euler()
var scale = new THREE.Vector3()
var color = new THREE.Color()
scale.x = scale.y = scale.z = POINT_SCALE
quaternion.setFromEuler(rotation, false)
matrix.compose(position, quaternion, scale)
geometry.applyMatrix(matrix)
material = new THREE.MeshBasicMaterial({color: color.setHex(0xffffff) })
cube = new THREE.Mesh(geometry, material)
scene.add(cube)
cubes.push(cube)
}
meshes = getLineGeometry(points).map((geometry, i) => {
var color = new THREE.Color()
var material = new MeshLineMaterial({
color: color.setHex(colors[i % colors.length]),
})
var line = new MeshLine()
line.setGeometry(geometry, _ => 1.5)
var mesh = new THREE.Mesh(line.geometry, material)
mesh.geometry.dynamic = true
scene.add(mesh)
return [line, mesh]
})
}
function lerpPoints(n, A, B, C) {
for (let i = 0, len = A.length; i < len; i++) {
lerpPoint(n, A[i], B[i], C[i])
}
}
function lerpPoint(n, A, B, C) {
C.x = lerp(n, A.x, B.x)
C.y = lerp(n, A.y, B.y)
C.z = lerp(n, A.z, B.z)
}
function lerp(n, a, b) {
return (b-a) * n + a
}
function swap(){
if (swapping) return
start_t = last_t
swapping = true
swap_count = (swap_count + 1) % faces.length
swapFrom = swapTo
swapTo = faces[swap_count]
document.querySelector('.currentFace').innerHTML = face_names[swap_count]
}
function update_swap(t){
var n = (t - start_t) / SWAP_TIME
if (n > 1) {
swapping = false
n = 1
}
lerpPoints(n, swapFrom, swapTo, faceBuffer)
updateFace(faceBuffer)
}
function updateFace(points) {
updateCubeGeometry(points)
updateLineGeometry(points)
}
function updateCubeGeometry(points) {
cubes.forEach((cube, i) => {
const p = points[i]
cube.position.set(p.x, p.y, p.z)
})
}
function updateLineGeometry(points) {
getLineGeometry(points).map((geometry, i) => {
var [line, mesh] = meshes[i]
line.setGeometry(geometry, _ => 1.5)
mesh.geometry.vertices = line.geometry.vertices
mesh.geometry.verticesNeedUpdate = true
})
}
function getLineGeometry(points) {
return [
points.slice(0, 17),
points.slice(17, 22),
points.slice(22, 27),
points.slice(27, 31),
points.slice(31, 36),
points.slice(36, 42),
points.slice(42, 48),
points.slice(48)
].map((a, i) => {
var geometry = new THREE.Geometry()
a.forEach(p => geometry.vertices.push(p))
if (i > 4) {
geometry.vertices.push(a[0])
}
return geometry
})
}
function getBounds(obj) {
return obj.reduce((a, p) => {
return [
Math.min(a[0], p[0]),
Math.max(a[1], p[0]),
Math.min(a[2], p[1]),
Math.max(a[3], p[1]),
Math.min(a[4], p[2]),
Math.max(a[5], p[2]),
]
}, [Infinity, -Infinity, Infinity, -Infinity, Infinity, -Infinity])
}
function recenter(obj) {
const bounds = getBounds(obj)
const x_width = (bounds[1] - bounds[0]) / 2
const y_width = (bounds[3] - bounds[2]) / -2
const z_width = (bounds[5] - bounds[4]) / 2
return obj.map(p => {
p[0] = p[0] - bounds[0] - x_width
p[1] = -p[1] + bounds[1] + y_width
p[2] = p[2] - bounds[2] + z_width
return new THREE.Vector3(p[0], p[1], p[2])
})
}
//
function onMouseMove(e) {
mouse.x = e.clientX / window.innerWidth
mouse.y = e.clientY / window.innerHeight
}
function animate(t) {
requestAnimationFrame(animate)
if (swapping) update_swap(t)
renderer.render(scene, camera)
scene.rotation.y += 0.01 * Math.PI
mouseTarget.x += (mouse.x - mouseTarget.x) * 0.1
mouseTarget.y += (mouse.y - mouseTarget.y) * 0.1
scene.rotation.x = (mouseTarget.y - 0.5) * Math.PI / 2
// scene.rotation.y = (mouseTarget.x - 0.5) * Math.PI
scene.rotation.y += 0.01
last_t = t
}
</script>
</body>
</html>
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