Dịch điểm biến mất bằng cách sử dụng đệm

Dịch tâm hoặc điểm biến mất của bản đồ để giảm méo khi hiển thị các phần tử nổi trên bản đồ.
<!DOCTYPE html>
<html lang="en">
<head>
    <title>Offset the vanishing point using padding</title>
    <meta property="og:description" content="Offset the center or vanishing point of the map to reduce distortion when floating elements are displayed over the map." />
    <meta charset='utf-8'>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="https://unpkg.com/[email protected]/dist/trackasia-gl.css" />
    <script src="https://unpkg.com/[email protected]/dist/trackasia-gl.js"></script>
    <style>
        body { margin: 0; padding: 0; }
        html, body, #map { height: 100%; }
        .rounded-rect {
            background: white;
            border-radius: 10px;
            box-shadow: 0 0 50px -25px black;
        }

        .flex-center {
            position: absolute;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .flex-center.left {
            left: 0px;
        }

        .flex-center.right {
            right: 0px;
        }

        .sidebar-content {
            position: absolute;
            width: 95%;
            height: 95%;
            font-family: Arial, Helvetica, sans-serif;
            font-size: 32px;
            color: gray;
        }

        .sidebar-toggle {
            position: absolute;
            width: 1.3em;
            height: 1.3em;
            overflow: visible;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .sidebar-toggle.left {
            right: -1.5em;
        }

        .sidebar-toggle.right {
            left: -1.5em;
        }

        .sidebar-toggle:hover {
            color: #0aa1cf;
            cursor: pointer;
        }

        .sidebar {
            transition: transform 1s;
            z-index: 1;
            width: 300px;
            height: 100%;
        }

        /*
        The sidebar styling has them "expanded" by default, we use CSS transforms to push them offscreen
        The toggleSidebar() function removes this class from the element in order to expand it.
        */
        .left.collapsed {
            transform: translateX(-295px);
        }

        .right.collapsed {
            transform: translateX(295px);
        }
    </style>
</head>
<body>

<div id="map">
    <div id="left" class="sidebar flex-center left collapsed">
        <div class="sidebar-content rounded-rect flex-center">
            Left Sidebar
            <div
                class="sidebar-toggle rounded-rect left"
                onclick="toggleSidebar('left')"
            >
                &rarr;
            </div>
        </div>
    </div>
    <div id="right" class="sidebar flex-center right collapsed">
        <div class="sidebar-content rounded-rect flex-center">
            Right Sidebar
            <div
                class="sidebar-toggle rounded-rect right"
                onclick="toggleSidebar('right')"
            >
                &larr;
            </div>
        </div>
    </div>
</div>

<script>
    const center = {"lat":10.762622,"lng":106.660172};
    const map = new trackasiagl.Map({
        container: 'map',
        zoom: 12.5,
        center,
        pitch: 60,
        style: 'https://maps.track-asia.com/styles/v2/streets.json?key=public_key'
    });

    new trackasiagl.Marker().setLngLat(center).addTo(map);

    function toggleSidebar(id) {
        const elem = document.getElementById(id);
        const classes = elem.className.split(' ');
        const collapsed = classes.indexOf('collapsed') !== -1;

        const padding = {};

        if (collapsed) {
            // Remove the 'collapsed' class from the class list of the element, this sets it back to the expanded state.
            classes.splice(classes.indexOf('collapsed'), 1);

            padding[id] = 300; // In px, matches the width of the sidebars set in .sidebar CSS class
            map.easeTo({
                padding,
                duration: 1000 // In ms, CSS transition duration property for the sidebar matches this value
            });
        } else {
            padding[id] = 0;
            // Add the 'collapsed' class to the class list of the element
            classes.push('collapsed');

            map.easeTo({
                padding,
                duration: 1000
            });
        }

        // Update the class list on the element
        elem.className = classes.join(' ');
    }

    map.on('load', () => {
        toggleSidebar('left');
    });
</script>

</body>
</html>