chasse/test-vanilla.html at main · eracomohan/chasse · GitHub

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<!DOCTYPE html>
<html lang="fr">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>holo</title>
    <style>
        /* body{
            margin: 0;
            background: #222;
            overflow: hidden;
        } */
        .img-s6 {
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            max-width: 90%;
            max-height: 90%;
            transition: opacity 0.2s ease;
            opacity: 0;
    will-change: opacity;
    transition: opacity 0.15s linear;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    max-width: 90%;
    max-height: 90%;
    opacity: 0;
    transition: opacity 0.15s linear;
    will-change: opacity;
}

    </style>
</head>
<body>
    <section>
    <img class="img-s6" src="img/2A3A9717.JPG" alt="">
    <img class="img-s6" src="img/2A3A9718.JPG" alt="">
    <img class="img-s6" src="img/2A3A9719.JPG" alt="">
    <img class="img-s6" src="img/2A3A9720.JPG" alt="">
    </section>

    <!-- <script>
        /*
        const images = document.querySelectorAll(".img");

        const minAngle = -70;
        const maxAngle = 70;

        const steps = images.length - 1;

        window.addEventListener("deviceorientation", (evt) => {
            const angle = evt.gamma;

            const t = clamp(invLerp(minAngle, maxAngle, angle), 0, 1);

            const scaled = t * steps;
            const index = Math.floor(scaled);
            const localT = scaled - index;

            images.forEach(img => img.style.opacity = 0);

            if (images[index]) {
                images[index].style.opacity = 1 - localT;
            }
            if (images[index + 1]) {
                images[index + 1].style.opacity = localT;
            }
        });

        function invLerp(a, b, v) {
            return (v - a) / (b - a);
        }

        function clamp(v, min, max) {
            return Math.min(max, Math.max(min, v));
        }
        */
const images = document.querySelectorAll(".img");
const steps = images.length - 1;

function updateFromT(t) {
    const scaled = t * steps;
    const index = Math.floor(scaled);
    const localT = scaled - index;

    images.forEach(img => img.style.opacity = 0);

    if (images[index]) {
        images[index].style.opacity = 1 - localT;
    }
    if (images[index + 1]) {
        images[index + 1].style.opacity = localT;
    }
}

// desktop
window.addEventListener("mousemove", e => {
    const t = clamp(e.clientY / window.innerHeight, 0, 1);
    updateFromT(t);
});

// mobile
window.addEventListener("deviceorientation", e => {
    const minAngle = -70;
    const maxAngle = 70;
    const t = clamp((e.gamma - minAngle) / (maxAngle - minAngle), 0, 1);
    updateFromT(t);
});

function clamp(v, min, max) {
    return Math.min(max, Math.max(min, v));
}

    </script> -->
<script>
const images = document.querySelectorAll(".img-s6");
const steps = images.length - 1;

// état
let targetT = 0;
let currentT = 0;
const smoothness = 0.1;

// init
images[0].style.opacity = 1;

function updateImages(t) {
    const scaled = t * steps;
    const index = Math.floor(scaled);
    const localT = scaled - index;

    // reset simple et fiable
    images.forEach(img => img.style.opacity = 0);

    if (images[index]) {
        images[index].style.opacity = 1 - localT;
    }
    if (images[index + 1]) {
        images[index + 1].style.opacity = localT;
    }
}

function animate() {
    currentT += (targetT - currentT) * smoothness;
    updateImages(currentT);
    requestAnimationFrame(animate);
}

// desktop
window.addEventListener("mousemove", e => {
    targetT = clamp(e.clientX / window.innerHeight, 0, 1);
});

// mobile
window.addEventListener("deviceorientation", e => {
    const minAngle = -70;
    const maxAngle = 70;
    targetT = clamp((e.gamma - minAngle) / (maxAngle - minAngle), 0, 1);
});

function clamp(v, min, max) {
    return Math.min(max, Math.max(min, v));
}

animate();
</script>

</body>
</html>