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| function blackhole(element) {
const container = document.querySelector(element);
const h = container.offsetHeight;
const w = container.offsetWidth;
const cw = w;
const ch = h;
const maxorbit = 255; // distance from center
const centery = ch / 2;
const centerx = cw / 2;
const startTime = new Date().getTime();
let currentTime = 0;
const stars = [];
let collapse = false; // if hovered
let expanse = false; // if clicked
let returning = false; // if particles are returning to orbit
// Create canvas
const canvas = document.createElement("canvas");
canvas.width = cw;
canvas.height = ch;
container.appendChild(canvas);
const context = canvas.getContext("2d");
context.globalCompositeOperation = "multiply";
function setDPI(canvas, dpi) {
// Set up CSS size if it's not set up already
if (!canvas.style.width) canvas.style.width = canvas.width + "px";
if (!canvas.style.height) canvas.style.height = canvas.height + "px";
const scaleFactor = dpi / 96;
canvas.width = Math.ceil(canvas.width * scaleFactor);
canvas.height = Math.ceil(canvas.height * scaleFactor);
const ctx = canvas.getContext("2d");
ctx.scale(scaleFactor, scaleFactor);
}
function rotate(cx, cy, x, y, angle) {
const radians = angle;
const cos = Math.cos(radians);
const sin = Math.sin(radians);
const nx = cos * (x - cx) + sin * (y - cy) + cx;
const ny = cos * (y - cy) - sin * (x - cx) + cy;
return [nx, ny];
}
setDPI(canvas, 192);
class Star {
constructor() {
// Get a weighted random number, so that the majority of stars will form in the center of the orbit
const rands = [];
rands.push(Math.random() * (maxorbit / 2) + 1);
rands.push(Math.random() * (maxorbit / 2) + maxorbit);
this.orbital = rands.reduce((p, c) => p + c, 0) / rands.length;
this.x = centerx; // All of these stars are at the center x position at all times
this.y = centery + this.orbital; // Set Y position starting at the center y + the position in the orbit
this.yOrigin = centery + this.orbital; // this is used to track the particles origin
this.speed = ((Math.floor(Math.random() * 2.5) + 1.5) * Math.PI) / 180; // The rate at which this star will orbit
this.rotation = 0; // current Rotation
this.startRotation =
((Math.floor(Math.random() * 360) + 1) * Math.PI) / 180; // Starting rotation
this.id = stars.length; // This will be used when expansion takes place
this.collapseBonus = this.orbital - maxorbit * 0.7; // This "bonus" is used to randomly place some stars outside of the blackhole on hover
if (this.collapseBonus < 0) {
// if the collapse "bonus" is negative
this.collapseBonus = 0; // set it to 0, this way no stars will go inside the blackhole
}
this.color = "rgba(255,255,255," + (1 - this.orbital / 255) + ")"; // Color the star white, but make it more transparent the further out it is generated
this.hoverPos = centery + maxorbit / 2 + this.collapseBonus; // Where the star will go on hover of the blackhole
this.expansePos =
centery + (this.id % 100) * -10 + (Math.floor(Math.random() * 20) + 1); // Where the star will go when expansion takes place
this.prevR = this.startRotation;
this.prevX = this.x;
this.prevY = this.y;
// Store original position for returning
this.originalY = this.yOrigin;
stars.push(this);
}
draw() {
if (!expanse && !returning) {
this.rotation = this.startRotation + currentTime * this.speed;
if (!collapse) {
// not hovered
if (this.y > this.yOrigin) {
this.y -= 2.5;
}
if (this.y < this.yOrigin - 4) {
this.y += (this.yOrigin - this.y) / 10;
}
} else {
// on hover
this.trail = 1;
if (this.y > this.hoverPos) {
this.y -= (this.hoverPos - this.y) / -5;
}
if (this.y < this.hoverPos - 4) {
this.y += 2.5;
}
}
} else if (expanse && !returning) {
this.rotation = this.startRotation + currentTime * (this.speed / 2);
if (this.y > this.expansePos) {
this.y -= Math.floor(this.expansePos - this.y) / -80; // Slower expansion for better visibility
}
}
context.save();
context.fillStyle = this.color;
context.strokeStyle = this.color;
context.beginPath();
const oldPos = rotate(
centerx,
centery,
this.prevX,
this.prevY,
-this.prevR
);
context.moveTo(oldPos[0], oldPos[1]);
context.translate(centerx, centery);
context.rotate(this.rotation);
context.translate(-centerx, -centery);
context.lineTo(this.x, this.y);
context.stroke();
context.restore();
this.prevR = this.rotation;
this.prevX = this.x;
this.prevY = this.y;
}
}
// Event listeners
const centerHover = document.querySelector(".centerHover");
centerHover.addEventListener("click", function () {
collapse = false;
expanse = true;
returning = false;
this.classList.add("open");
});
centerHover.addEventListener("mouseover", function () {
if (expanse === false) {
collapse = true;
}
});
centerHover.addEventListener("mouseout", function () {
if (expanse === false) {
collapse = false;
}
});
// Animation loop
function loop() {
const now = new Date().getTime();
currentTime = (now - startTime) / 50;
context.fillStyle = "rgba(25,25,25,0.2)"; // somewhat clear the context, this way there will be trails behind the stars
context.fillRect(0, 0, cw, ch);
for (let i = 0; i < stars.length; i++) {
// For each star
if (stars[i] !== undefined) {
stars[i].draw(); // Draw it
}
}
requestAnimationFrame(loop);
}
function init() {
context.fillStyle = "rgba(25,25,25,1)"; // Initial clear of the canvas
context.fillRect(0, 0, cw, ch);
for (let i = 0; i < 2500; i++) {
// create 2500 stars
new Star();
}
loop();
}
init();
}
// Initialize when DOM is loaded
document.addEventListener("DOMContentLoaded", () => {
blackhole("#blackhole");
});
window.onload = function () {
const flow = {
start: {
question: "Nous sommes en 2072, l'univers a évolué. La Terre a été abandonnée au profit de Mars suite à l'évolution des températures rendant la surface de celle-ci invivable.",
options: {
continuer: "partie1"
}
},
partie1: {
question: "L'organisation des pays a été complètement effacée. Cinq conglomérats dirigent l'ensemble de la population restante qui a pu se déplacer vers Mars.",
options: {
continuer: "partie2"
}
},
partie2: {
icon: "fa-brain",
question: "Where's your focus pointed?",
options: {
Deadlines: "deadline",
"Passion Project": "dream",
"Self work": "myself"
}
},
adventurous: {
icon: "fa-shoe-prints",
question: "What's calling you outward?",
options: {
Nature: "nature",
Creativity: "create",
Movement: "move"
}
},
Lethargic: {
icon: "fa-bed",
question: "Do you want to embrace it or shift it?",
options: {
"Embrace it": "embracelazy",
"Shift it": "movelazy"
}
},
frustrated: {
icon: "fa-face-angry",
question: "Where do you feel it most?",
options: {
"Mind racing": "mindstorm",
"Tension in body": "tensionbody"
}
},
disconnected: {
icon: "fa-circle-question",
question: "Would you rather...",
options: {
Retreat: "retreat",
"Reach out": "reach"
}
},
// Final insights
alone: {
message:
"Solitude can be sacred. Give yourself space without guilt, it’s where nervous systems reset and inner clarity forms."
},
withsomeone: {
message:
"Social support doesn’t require deep conversation. A simple check-in can be enough to feel seen and reconnected."
},
music: {
message:
"Let ambient sound fill your space. Familiar rhythms help regulate the nervous system and reduce mental noise."
},
deadline: {
message:
"Focus works best when it’s contained. Pick one small task, remove distractions, and allow momentum to build naturally."
},
dream: {
message:
"Your imagination deserves your attention. A small step toward something that excites you shifts your emotional state."
},
myself: {
message:
"Growth often starts in stillness. Self-work isn’t glamorous, but making space for it signals deep care for your future self."
},
nature: {
message:
"Natural environments lower cortisol, ease anxiety, and return your brain to its baseline. Step outside, even briefly."
},
create: {
message:
"Creative expression is emotional regulation. Even doodles, scraps, or silly ideas unlock stored-up energy and insight."
},
move: {
message:
"Movement metabolizes stress. Shake, walk, stretch, anything to let the tension move through and out."
},
emotional: {
message:
"Your emotions are messengers, not threats. Sit with them gently, they usually soften once they’re heard."
},
lost: {
message:
"Mental fog is often a cue for rest or direction change. Allow yourself to pause, not everything must be optimized."
},
embracelazy: {
message:
"Rest is productive too. Sometimes laziness is your body asking to slow down. Honor it without shame."
},
movelazy: {
message:
"Shift the vibe with motion. A 2-minute stretch or walk can nudge your energy without pressure to be 'productive.'"
},
mindstorm: {
message:
"Racing thoughts often mean you need an outlet. Try journaling, breathwork, or even a loud playlist to reset your pace."
},
tensionbody: {
message:
"Your body remembers what your mind won’t say. Scan for tension and soften what you can. Your body is your ally."
},
retreat: {
message:
"Pulling back doesn’t mean giving up. It often means you’re listening to your limits — and that’s a form of wisdom."
},
reach: {
message:
"Vulnerability creates connection. Reaching out may feel risky, but it’s often the first step toward relief and resonance."
}
};
const container = document.getElementById("slideContainer");
function createSlide(key) {
const data = flow[key];
const slide = document.createElement("div");
slide.className = "slide";
slide.style.animationName = "slideIn";
if (data.message) {
slide.innerHTML = `
<h2><i class="fa-solid fa-diamond"></i> FINAL INSIGHT</h2>
<div class="options">
<div class="final-message">${data.message}</div>
<button class="option-button restart-button" onclick="startOver()">
<i class="fa-solid fa-rotate-left"></i><span>Restart</span>
</button>
</div>
`;
return slide;
}
slide.innerHTML = `
<h2><i class="fa-solid ${data.icon}"></i> ${data.question}</h2>
<div class="options">
${Object.entries(data.options)
.map(
([label, nextKey]) =>
`<button class="option-button" onclick="nextStep('${nextKey}')">${label}</button>`
)
.join("")}
</div>
`;
return slide;
}
window.nextStep = function (key) {
const oldSlide = container.querySelector(".slide");
if (oldSlide) {
oldSlide.style.animationName = "slideOut";
oldSlide.addEventListener("animationend", () => {
oldSlide.remove();
const newSlide = createSlide(key);
container.appendChild(newSlide);
});
} else {
const newSlide = createSlide(key);
container.appendChild(newSlide);
}
};
window.startOver = function () {
container.innerHTML = "";
nextStep("start");
};
const enterButton = document.getElementById("enterButton");
enterButton.addEventListener("click", () => {
setTimeout(() => {
enterButton.classList.add("open");
questionnaire.classList.add("active");
//nextStep("start");
}, 5000);
});
nextStep("start");
}; |
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