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particle-starry-sky-story.html
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particle-starry-sky-story.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<link rel="shortcut icon" href="img/favicon.ico">
<title>Starry Sky as Story</title>
<style>
body { margin: 0; }
canvas { display: block; }
.story--holder {
position: relative;
display: flex;
flex-wrap: wrap;
justify-content: center;
align-items: center;
width: 100vw;
height: 100vh;
overflow: hidden;
}
.section--inner {
position: relative;
width: 100%;
max-width: 1180px;
margin: 0 auto;
padding: 0 130px;
z-index: 2;
}
.story {
pointer-events: none;
opacity: 0;
transform: translateY(60px);
transition: opacity .75s cubic-bezier(0.69, 0.01, 0.27, 0.9), transform 1s cubic-bezier(0.69, 0.01, 0.27, 0.9);
}
.story ~ .story {
position: absolute;
top: 0;
left: 130px;
}
.story.story--active {
pointer-events: initial;
opacity: 1;
transform: translateY(0);
}
.story h2 {
margin: 0;
font-family: 'Inter', sans-serif;
font-size: clamp(48px, 10vw, 56px);
font-weight: 400;
letter-spacing: -0.02em;
color: #ffffff;
}
.story p {
margin: 10px 0 0;
font-family: 'Inter', sans-serif;
font-size: 16px;
font-weight: 200;
color: #ffffffaa;
}
#canvas-container {
display: flex;
flex-wrap: wrap;
justify-content: center;
align-items: center;
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
width: 100vw;
height: 100vh;
z-index: 1;
}
.navigator {
position: absolute;
bottom: 70px;
animation: navigator 2s both ease;
animation-delay: 2s;
animation-direction: normal;
animation-iteration-count: 1;
}
#keys {
display: grid;
grid-template-columns: repeat(3, 38px);
grid-auto-rows: 38px;
grid-gap: 4px;
justify-content: center;
}
#keys > div {
width: 100%;
height: 100%;
border-radius: 6px;
opacity: 0.4;
transition: background .1s ease, opacity .1s ease;
}
#keys > div.highlight {
opacity: 1;
background-color: rgba(255,255,255,0.1);
}
#keys .up { background: url('img/arrow_up.svg') no-repeat center/cover; grid-row: 1; grid-column: 2; }
#keys .left { background: url('img/arrow_left.svg') no-repeat center/cover; grid-row: 2; grid-column: 1; transform: translateY(-8px); }
#keys .right { background: url('img/arrow_right.svg') no-repeat center/cover; grid-row: 2; grid-column: 3; transform: translateY(-8px); }
#keys .down { background: url('img/arrow_down.svg') no-repeat center/cover; grid-row: 2; grid-column: 2; }
.navigator .legend {
margin: 20px 0 0;
font-family: 'Inter', sans-serif;
font-size: 13px;
font-weight: 200;
color: #ffffff55;
}
@keyframes navigator {
0% { opacity: 0; transform: translateY(30px); }
85% { opacity: 1; }
100% { transform: translateY(0); }
}
</style>
</head>
<body>
<div class="story--holder" id="universe">
<div class="section--inner">
<div class="story" data-step="1">
<h2>The Earth</h2>
<p>Mankind's only place for redemption</p>
</div>
<div class="story" data-step="2">
<h2>Mars</h2>
<p>Lorem ipsum dolor sit amet, consetetur elitr.</p>
</div>
<div class="story" data-step="3">
<h2>Jupiter</h2>
<p>Lorem ipsum dolor sit amet, consetetur elitr.</p>
</div>
<div class="story" data-step="4">
<h2>Saturn</h2>
<p>Lorem ipsum dolor sit amet, consetetur elitr.</p>
</div>
</div>
<div id="canvas-container">
<div class="navigator">
<div id="keys">
<div class="up"></div>
<div class="left"></div>
<div class="right"></div>
<div class="down"></div>
</div>
<div class="legend">Use the up- and arrow key to navigate</div>
</div>
</div>
</div>
<script src="js/three.js"></script>
<script type="module">
// import * as THREE from './js/three.js';
import { OrbitControls } from './js/OrbitControls.js';
var container;
var camera, scene, renderer, controls;
var framesCount = 0;
var lightHelper, ambientLight, pointLight, directionalLight, hemisphereLight, cameraLight;
var wireframe;
var localGroup;
var particles = [],
particle, geometry, material;
// Math variables
const deg = Math.PI / 180; // one degree
const sin1 = Math.PI / 2; // one sin
// Story variables
const storyUpEvent = new Event('storyUp');
const storyDownEvent = new Event('storyDown');
let storyFrameClicked;
let storyCameraPositionClicked = new THREE.Vector3();
let storyTransition = false;
let storyStep = 0;
const storyFrames = [
{
camera: { position: { x: 600, y: -420, z: -150 } }
},
{
camera: { position: { x: 400, y: -320, z: -120 } }
},
{
camera: { position: { x: 200, y: -220, z: -90 } }
},
{
camera: { position: { x: 0, y: -120, z: -60 } }
},
{
camera: { position: { x: 0, y: 0, z: 400 } }
}
]
// Assign story variables
window.story = storyStep;
window.storyFrames = storyFrames;
init();
sceneAnimation();
// Initiating Scene
function init() {
// INIT Scene
// --------------------------------------
scene = new THREE.Scene();
// INIT Camera
// --------------------------------------
camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
// camera.position.set(0, -200, -200); // outside perspective
camera.position.set(600, -420, -150);
camera.lookAt(600, 0, 0);
// INIT Renderer
// --------------------------------------
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setClearColor('#0f0f1f');
container = document.getElementById('canvas-container');
container.appendChild(renderer.domElement);
// INIT Options
// --------------------------------------
// Controls
// addControls();
// Create particles
sceneParticlesRandom();
// Create group
sceneGroup(localGroup, particles);
// Update renderer and camera when resizing
window.addEventListener('resize', onWindowResize, false);
// INIT Story
// --------------------------------------
window.addEventListener('keydown', function(e) {
storyUp(e);
storyDown(e);
storyTriggerRewrites();
}, false);
}
// Rendering the scene
function sceneAnimation() {
requestAnimationFrame(sceneAnimation);
framesCount++;
// Single Particles Animation
for (let i = 0; i < particles.length; ++i) {
// Opacity
particles[i].material.opacity = (Math.sin((i + framesCount) * 0.01)) + 1.25;
}
// Sphere Animation
localGroup.rotation.x += 0.000100;
localGroup.rotation.y += 0.000175;
localGroup.rotation.z += 0.000250;
// Story Animation
if (storyTransition === true) {
storyAnimateCameraPosition(framesCount, storyFrameClicked, storyCameraPositionClicked, 200);
}
renderer.render(scene, camera);
}
function addControls() {
controls = new OrbitControls(camera, renderer.domElement);
controls.screenSpacePanning = true;
controls.minDistance = 0;
controls.maxDistance = 750;
controls.target.set(0, 0, 0);
controls.update();
}
function sceneParticlesRandom(size = 0.2, length = 10000, minDistance = 50, maxDistance = 750) {
// Init
geometry = new THREE.SphereBufferGeometry(size, 8, 8);
let i = 0;
for (i; i < length; ++i) {
// Init
material = new THREE.MeshBasicMaterial( { color: "hsl(0, 100%, 100%)" } );
particle = particles[i] = new THREE.Mesh(geometry, material);
particle.material.transparent = true;
// With three.js math utilities
particle.position.x = THREE.MathUtils.randFloat(minDistance, maxDistance) * THREE.MathUtils.randFloatSpread(2);
particle.position.y = THREE.MathUtils.randFloat(minDistance, maxDistance) * THREE.MathUtils.randFloatSpread(2);
particle.position.z = THREE.MathUtils.randFloat(minDistance, maxDistance) * THREE.MathUtils.randFloatSpread(2);
scene.add(particle);
}
}
function sceneGroup(group, objs) {
group = localGroup = new THREE.Group();
objs.forEach(function(obj) {
group.add(obj);
});
scene.add(group);
}
// Camera
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
// Story
// Increase story count (general)
function storyUp(e) {
const s = window.story,
// Conditions
_key = e.key === 'ArrowUp',
_min = s >= 0,
_max = s < window.storyFrames.length - 1;
if (_key && _min && _max) {
window.story = s + 1;
document.dispatchEvent(storyUpEvent);
}
}
// Decrease story count (general)
function storyDown(e) {
const s = window.story,
// Conditions
_key = e.key === 'ArrowDown',
_min = s > 0;
if (_key && _min) {
window.story = s - 1;
document.dispatchEvent(storyDownEvent);
}
}
// Get current status and write to story (general)
function storyTriggerRewrites() {
// Get current status on trigger
storyTransition = true;
storyFrameClicked = framesCount;
storyCameraPositionClicked.x = camera.position.x;
storyCameraPositionClicked.y = camera.position.y;
storyCameraPositionClicked.z = camera.position.z;
}
function storyAnimateCameraPosition(framesCount, storyFrameClicked, storyCameraPositionClicked, countTo) {
const current = camera.position;
const target = window.storyFrames[window.story].camera.position;
const s = storyCameraPositionClicked;
// Approach 0 to 1 (Math.PI / 2) in (countTo) frames
let progress = Math.sin(sin1 / countTo * (framesCount - storyFrameClicked));
current.x = s.x + ((target.x - s.x) * progress);
current.y = s.y + ((target.y - s.y) * progress);
current.z = s.z + ((target.z - s.z) * progress);
// Progress finished : end animation
if (progress >= 1) {
storyTransition = false;
return false;
}
}
</script>
<script src="js/jquery-3.5.1.min.js" type="text/javascript"></script>
<script>
$(document).ready(function() {
document.addEventListener('storyUp', getCurrentStoryStep, false);
document.addEventListener('storyDown', getCurrentStoryStep, false);
function getCurrentStoryStep() {
let $storyStep = $('.story--holder .story');
$storyStep.each(function() {
let $this = $(this);
let _step = $this.attr('data-step') === window.story.toString();
$this.toggleClass('story--active', _step);
});
}
// Controls Highlighting
const $up = $('#keys .up');
const $down = $('#keys .down');
document.addEventListener('keydown', function(e) { displayArrowKeysHighlight(e) }, false);
document.addEventListener('keyup', function(e) { removeArrowKeysHighlight(e) }, false);
function displayArrowKeysHighlight(e) {
const key = e.key;
let _up = key === 'ArrowUp';
let _down = key === 'ArrowDown';
if (_up) {
$up.addClass('highlight');
}
if (_down) {
$down.addClass('highlight');
}
}
function removeArrowKeysHighlight(e) {
const key = e.key;
let _up = key === 'ArrowUp';
let _down = key === 'ArrowDown';
if (_up) {
$up.removeClass('highlight');
}
if (_down) {
$down.removeClass('highlight');
}
}
});
</script>
</body>
</html>