47 lines
1.5 KiB
JavaScript
47 lines
1.5 KiB
JavaScript
// dictionary to keep track of frame count for each animation
|
|
let frameCounts = {};
|
|
|
|
function animate(id, delay) {
|
|
|
|
// get the container and frames for the amination
|
|
const container = document.getElementById(id);
|
|
const frames = container.children;
|
|
|
|
// set up the frame counter
|
|
frameCounts[id] = 0;
|
|
|
|
// hide all frames except for the first
|
|
frames[0].style.display = "flex";
|
|
for (let i = 1; i < frames.length; i++) {
|
|
frames[i].style.display = "none";
|
|
}
|
|
|
|
// start the animation
|
|
const interval = setInterval(updateAnimation, delay, id, frames, frames.length);
|
|
|
|
}
|
|
|
|
function updateAnimation(id, frames, totalFrames) {
|
|
|
|
// increment the frame counter for the given id
|
|
frameCounts[id] = (frameCounts[id] + 1) % totalFrames;
|
|
|
|
// show the next frame
|
|
frames[frameCounts[id]].style.display = "flex";
|
|
|
|
// hide the previous frame
|
|
if (frameCounts[id] == 0) {
|
|
frames[totalFrames - 1].style.display = "none";
|
|
} else {
|
|
frames[frameCounts[id] - 1].style.display = "none";
|
|
}
|
|
|
|
}
|
|
|
|
// If the user have a setting on their device to minimize the amount of non-essential motion
|
|
const preferReduceMotion = window.matchMedia("(prefers-reduced-motion)").matches;
|
|
|
|
animate("illustration-accueil", preferReduceMotion ? 1500 : 500); // Reduce framerate if use preference is to reduce motion
|
|
animate("rennes", preferReduceMotion ? 3000 : 1000); // Reduce framerate if use preference is to reduce motion
|
|
animate("orsay", preferReduceMotion ? 4000 : 2000); // Reduce framerate if use preference is to reduce motion
|
|
animate("parterre", 1500);
|