e"></label>

            <div id="controls">
                <button style="display:block" onclick="document.getElementById('plyButton').click()">Choose
                    point_cloud.ply</button>
                <input type="file" accept=".ply" style="display:none" id="plyButton" />

                <button style="display:block" onclick="document.getElementById('cameraButton').click()">Choose
                    cameras.json</button>
                <input type="file" accept=".json" style="display:none" i