demo

convert.py

@@ -1,85 +0,0 @@
-# You can use this to convert a .ply file to a .splat file programmatically in python
-# Alternatively you can drag and drop a .ply file into the viewer at https://antimatter15.com/splat
-
-from plyfile import PlyData
-import numpy as np
-import argparse
-from io import BytesIO
-
-
-def process_ply_to_splat(ply_file_path):
-    plydata = PlyData.read(ply_file_path)
-    vert = plydata["vertex"]
-    sorted_indices = np.argsort(
-        -np.exp(vert["scale_0"] + vert["scale_1"] + vert["scale_2"])
-        / (1 + np.exp(-vert["opacity"]))
-    )
-    buffer = BytesIO()
-    for idx in sorted_indices:
-        v = plydata["vertex"][idx]
-        position = np.array([v["x"], v["y"], v["z"]], dtype=np.float32)
-        scales = np.exp(
-            np.array(
-                [v["scale_0"], v["scale_1"], v["scale_2"]],
-                dtype=np.float32,
-            )
-        )
-        rot = np.array(
-            [v["rot_0"], v["rot_1"], v["rot_2"], v["rot_3"]],
-            dtype=np.float32,
-        )
-        SH_C0 = 0.28209479177387814
-        color = np.array(
-            [
-                0.5 + SH_C0 * v["f_dc_0"],
-                0.5 + SH_C0 * v["f_dc_1"],
-                0.5 + SH_C0 * v["f_dc_2"],
-                1 / (1 + np.exp(-v["opacity"])),
-            ]
-        )
-        buffer.write(position.tobytes())
-        buffer.write(scales.tobytes())
-        buffer.write((color * 255).clip(0, 255).astype(np.uint8).tobytes())
-        buffer.write(
-            ((rot / np.linalg.norm(rot)) * 128 + 128)
-            .clip(0, 255)
-            .astype(np.uint8)
-            .tobytes()
-        )
-
-    return buffer.getvalue()
-
-
-def save_splat_file(splat_data, output_path):
-    with open(output_path, "wb") as f:
-        f.write(splat_data)
-
-
-def convert(input_path, output_path):
-    """Convert a PLY file to SPLAT format."""
-    splat_data = process_ply_to_splat(input_path)
-    save_splat_file(splat_data, output_path)
-    return output_path
-
-
-def main():
-    parser = argparse.ArgumentParser(description="Convert PLY files to SPLAT format.")
-    parser.add_argument(
-        "input_files", nargs="+", help="The input PLY files to process."
-    )
-    parser.add_argument(
-        "--output", "-o", default="output.splat", help="The output SPLAT file."
-    )
-    args = parser.parse_args()
-    for input_file in args.input_files:
-        print(f"Processing {input_file}...")
-        splat_data = process_ply_to_splat(input_file)
-        output_file = (
-            args.output if len(args.input_files) == 1 else input_file + ".splat"
-        )
-        save_splat_file(splat_data, output_file)
-        print(f"Saved {output_file}")
-
-
-if __name__ == "__main__":
-    main()

viewer.js

@@ -1,1484 +0,0 @@
-let cameras = [
-    {
-        id: 0,
-        img_name: "00001",
-        width: 1959,
-        height: 1090,
-        position: [
-            -3.0089893469241797, -0.11086489695181866, -3.7527640949141428,
-        ],
-        rotation: [
-            [0.876134201218856, 0.06925962026449776, 0.47706599800804744],
-            [-0.04747421839895102, 0.9972110940209488, -0.057586739349882114],
-            [-0.4797239414934443, 0.027805376500959853, 0.8769787916452908],
-        ],
-        fy: 1164.6601287484507,
-        fx: 1159.5880733038064,
-    },
-    {
-        id: 1,
-        img_name: "00009",
-        width: 1959,
-        height: 1090,
-        position: [
-            -2.5199776022057296, -0.09704735754873686, -3.6247725540304545,
-        ],
-        rotation: [
-            [0.9982731285632193, -0.011928707708098955, -0.05751927260507243],
-            [0.0065061360949636325, 0.9955928229282383, -0.09355533724430458],
-            [0.058381769258182864, 0.09301955098900708, 0.9939511719154457],
-        ],
-        fy: 1164.6601287484507,
-        fx: 1159.5880733038064,
-    },
-    {
-        id: 2,
-        img_name: "00017",
-        width: 1959,
-        height: 1090,
-        position: [
-            -0.7737533667465242, -0.3364271945329695, -2.9358969417573753,
-        ],
-        rotation: [
-            [0.9998813418672372, 0.013742375651625236, -0.0069605529394208224],
-            [-0.014268370388586709, 0.996512943252834, -0.08220929105659476],
-            [0.00580653013657589, 0.08229885200307129, 0.9965907801935302],
-        ],
-        fy: 1164.6601287484507,
-        fx: 1159.5880733038064,
-    },
-    {
-        id: 3,
-        img_name: "00025",
-        width: 1959,
-        height: 1090,
-        position: [
-            1.2198221749590001, -0.2196687861401182, -2.3183162007028453,
-        ],
-        rotation: [
-            [0.9208648867765482, 0.0012010625395201253, 0.389880004297208],
-            [-0.06298204172269357, 0.987319521752825, 0.14571693239364383],
-            [-0.3847611242348369, -0.1587410451475895, 0.9092635249821667],
-        ],
-        fy: 1164.6601287484507,
-        fx: 1159.5880733038064,
-    },
-    {
-        id: 4,
-        img_name: "00033",
-        width: 1959,
-        height: 1090,
-        position: [
-            1.742387858893817, -0.13848225198886954, -2.0566370113193146,
-        ],
-        rotation: [
-            [0.24669889292141334, -0.08370189346592856, -0.9654706879349405],
-            [0.11343747891376445, 0.9919082664242816, -0.05700815184573074],
-            [0.9624300466054861, -0.09545671285663988, 0.2541976029815521],
-        ],
-        fy: 1164.6601287484507,
-        fx: 1159.5880733038064,
-    },
-    {
-        id: 5,
-        img_name: "00041",
-        width: 1959,
-        height: 1090,
-        position: [
-            3.6567309419223935, -0.16470990600750707, -1.3458085590422042,
-        ],
-        rotation: [
-            [0.2341293058324528, -0.02968330457755884, -0.9717522161434825],
-            [0.10270823606832301, 0.99469554638321, -0.005638106875665722],
-            [0.9667649592295676, -0.09848690996657204, 0.2359360976431732],
-        ],
-        fy: 1164.6601287484507,
-        fx: 1159.5880733038064,
-    },
-    {
-        id: 6,
-        img_name: "00049",
-        width: 1959,
-        height: 1090,
-        position: [
-            3.9013554243203497, -0.2597500978038105, -0.8106154188297828,
-        ],
-        rotation: [
-            [0.6717235545638952, -0.015718162115524837, -0.7406351366386528],
-            [0.055627354673906296, 0.9980224478387622, 0.029270992841185218],
-            [0.7387104058127439, -0.060861588786650656, 0.6712695459756353],
-        ],
-        fy: 1164.6601287484507,
-        fx: 1159.5880733038064,
-    },
-    {
-        id: 7,
-        img_name: "00057",
-        width: 1959,
-        height: 1090,
-        position: [4.742994605467533, -0.05591660945412069, 0.9500365976084458],
-        rotation: [
-            [-0.17042655709210375, 0.01207080756938, -0.9852964448542146],
-            [0.1165090336695526, 0.9931575292530063, -0.00798543433078162],
-            [0.9784581921120181, -0.1161568667478904, -0.1706667764862097],
-        ],
-        fy: 1164.6601287484507,
-        fx: 1159.5880733038064,
-    },
-    {
-        id: 8,
-        img_name: "00065",
-        width: 1959,
-        height: 1090,
-        position: [4.34676307626522, 0.08168160516967145, 1.0876221470355405],
-        rotation: [
-            [-0.003575447631888379, -0.044792503246552894, -0.9989899137764799],
-            [0.10770152645126597, 0.9931680875192705, -0.04491693593046672],
-            [0.9941768441149182, -0.10775333677534978, 0.0012732004866391048],
-        ],
-        fy: 1164.6601287484507,
-        fx: 1159.5880733038064,
-    },
-    {
-        id: 9,
-        img_name: "00073",
-        width: 1959,
-        height: 1090,
-        position: [3.264984351114202, 0.078974937336732, 1.0117200284114904],
-        rotation: [
-            [-0.026919994628162257, -0.1565891128261527, -0.9872968974090509],
-            [0.08444552208239385, 0.983768234577625, -0.1583319754069128],
-            [0.9960643893290491, -0.0876350978794554, -0.013259786205163005],
-        ],
-        fy: 1164.6601287484507,
-        fx: 1159.5880733038064,
-    },
-];
-
-let camera = cameras[0];
-
-function getProjectionMatrix(fx, fy, width, height) {
-    const znear = 0.2;
-    const zfar = 200;
-    return [
-        [(2 * fx) / width, 0, 0, 0],
-        [0, -(2 * fy) / height, 0, 0],
-        [0, 0, zfar / (zfar - znear), 1],
-        [0, 0, -(zfar * znear) / (zfar - znear), 0],
-    ].flat();
-}
-
-function getViewMatrix(camera) {
-    const R = camera.rotation.flat();
-    const t = camera.position;
-    const camToWorld = [
-        [R[0], R[1], R[2], 0],
-        [R[3], R[4], R[5], 0],
-        [R[6], R[7], R[8], 0],
-        [
-            -t[0] * R[0] - t[1] * R[3] - t[2] * R[6],
-            -t[0] * R[1] - t[1] * R[4] - t[2] * R[7],
-            -t[0] * R[2] - t[1] * R[5] - t[2] * R[8],
-            1,
-        ],
-    ].flat();
-    return camToWorld;
-}
-// function translate4(a, x, y, z) {
-//     return [
-//         ...a.slice(0, 12),
-//         a[0] * x + a[4] * y + a[8] * z + a[12],
-//         a[1] * x + a[5] * y + a[9] * z + a[13],
-//         a[2] * x + a[6] * y + a[10] * z + a[14],
-//         a[3] * x + a[7] * y + a[11] * z + a[15],
-//     ];
-// }
-
-function multiply4(a, b) {
-    return [
-        b[0] * a[0] + b[1] * a[4] + b[2] * a[8] + b[3] * a[12],
-        b[0] * a[1] + b[1] * a[5] + b[2] * a[9] + b[3] * a[13],
-        b[0] * a[2] + b[1] * a[6] + b[2] * a[10] + b[3] * a[14],
-        b[0] * a[3] + b[1] * a[7] + b[2] * a[11] + b[3] * a[15],
-        b[4] * a[0] + b[5] * a[4] + b[6] * a[8] + b[7] * a[12],
-        b[4] * a[1] + b[5] * a[5] + b[6] * a[9] + b[7] * a[13],
-        b[4] * a[2] + b[5] * a[6] + b[6] * a[10] + b[7] * a[14],
-        b[4] * a[3] + b[5] * a[7] + b[6] * a[11] + b[7] * a[15],
-        b[8] * a[0] + b[9] * a[4] + b[10] * a[8] + b[11] * a[12],
-        b[8] * a[1] + b[9] * a[5] + b[10] * a[9] + b[11] * a[13],
-        b[8] * a[2] + b[9] * a[6] + b[10] * a[10] + b[11] * a[14],
-        b[8] * a[3] + b[9] * a[7] + b[10] * a[11] + b[11] * a[15],
-        b[12] * a[0] + b[13] * a[4] + b[14] * a[8] + b[15] * a[12],
-        b[12] * a[1] + b[13] * a[5] + b[14] * a[9] + b[15] * a[13],
-        b[12] * a[2] + b[13] * a[6] + b[14] * a[10] + b[15] * a[14],
-        b[12] * a[3] + b[13] * a[7] + b[14] * a[11] + b[15] * a[15],
-    ];
-}
-
-function invert4(a) {
-    let b00 = a[0] * a[5] - a[1] * a[4];
-    let b01 = a[0] * a[6] - a[2] * a[4];
-    let b02 = a[0] * a[7] - a[3] * a[4];
-    let b03 = a[1] * a[6] - a[2] * a[5];
-    let b04 = a[1] * a[7] - a[3] * a[5];
-    let b05 = a[2] * a[7] - a[3] * a[6];
-    let b06 = a[8] * a[13] - a[9] * a[12];
-    let b07 = a[8] * a[14] - a[10] * a[12];
-    let b08 = a[8] * a[15] - a[11] * a[12];
-    let b09 = a[9] * a[14] - a[10] * a[13];
-    let b10 = a[9] * a[15] - a[11] * a[13];
-    let b11 = a[10] * a[15] - a[11] * a[14];
-    let det =
-        b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;
-    if (!det) return null;
-    return [
-        (a[5] * b11 - a[6] * b10 + a[7] * b09) / det,
-        (a[2] * b10 - a[1] * b11 - a[3] * b09) / det,
-        (a[13] * b05 - a[14] * b04 + a[15] * b03) / det,
-        (a[10] * b04 - a[9] * b05 - a[11] * b03) / det,
-        (a[6] * b08 - a[4] * b11 - a[7] * b07) / det,
-        (a[0] * b11 - a[2] * b08 + a[3] * b07) / det,
-        (a[14] * b02 - a[12] * b05 - a[15] * b01) / det,
-        (a[8] * b05 - a[10] * b02 + a[11] * b01) / det,
-        (a[4] * b10 - a[5] * b08 + a[7] * b06) / det,
-        (a[1] * b08 - a[0] * b10 - a[3] * b06) / det,
-        (a[12] * b04 - a[13] * b02 + a[15] * b00) / det,
-        (a[9] * b02 - a[8] * b04 - a[11] * b00) / det,
-        (a[5] * b07 - a[4] * b09 - a[6] * b06) / det,
-        (a[0] * b09 - a[1] * b07 + a[2] * b06) / det,
-        (a[13] * b01 - a[12] * b03 - a[14] * b00) / det,
-        (a[8] * b03 - a[9] * b01 + a[10] * b00) / det,
-    ];
-}
-
-function rotate4(a, rad, x, y, z) {
-    let len = Math.hypot(x, y, z);
-    x /= len;
-    y /= len;
-    z /= len;
-    let s = Math.sin(rad);
-    let c = Math.cos(rad);
-    let t = 1 - c;
-    let b00 = x * x * t + c;
-    let b01 = y * x * t + z * s;
-    let b02 = z * x * t - y * s;
-    let b10 = x * y * t - z * s;
-    let b11 = y * y * t + c;
-    let b12 = z * y * t + x * s;
-    let b20 = x * z * t + y * s;
-    let b21 = y * z * t - x * s;
-    let b22 = z * z * t + c;
-    return [
-        a[0] * b00 + a[4] * b01 + a[8] * b02,
-        a[1] * b00 + a[5] * b01 + a[9] * b02,
-        a[2] * b00 + a[6] * b01 + a[10] * b02,
-        a[3] * b00 + a[7] * b01 + a[11] * b02,
-        a[0] * b10 + a[4] * b11 + a[8] * b12,
-        a[1] * b10 + a[5] * b11 + a[9] * b12,
-        a[2] * b10 + a[6] * b11 + a[10] * b12,
-        a[3] * b10 + a[7] * b11 + a[11] * b12,
-        a[0] * b20 + a[4] * b21 + a[8] * b22,
-        a[1] * b20 + a[5] * b21 + a[9] * b22,
-        a[2] * b20 + a[6] * b21 + a[10] * b22,
-        a[3] * b20 + a[7] * b21 + a[11] * b22,
-        ...a.slice(12, 16),
-    ];
-}
-
-function translate4(a, x, y, z) {
-    return [
-        ...a.slice(0, 12),
-        a[0] * x + a[4] * y + a[8] * z + a[12],
-        a[1] * x + a[5] * y + a[9] * z + a[13],
-        a[2] * x + a[6] * y + a[10] * z + a[14],
-        a[3] * x + a[7] * y + a[11] * z + a[15],
-    ];
-}
-
-function createWorker(self) {
-    let buffer;
-    let vertexCount = 0;
-    let viewProj;
-    // 6*4 + 4 + 4 = 8*4
-    // XYZ - Position (Float32)
-    // XYZ - Scale (Float32)
-    // RGBA - colors (uint8)
-    // IJKL - quaternion/rot (uint8)
-    const rowLength = 3 * 4 + 3 * 4 + 4 + 4;
-    let lastProj = [];
-    let depthIndex = new Uint32Array();
-    let lastVertexCount = 0;
-
-    var _floatView = new Float32Array(1);
-    var _int32View = new Int32Array(_floatView.buffer);
-
-    function floatToHalf(float) {
-        _floatView[0] = float;
-        var f = _int32View[0];
-
-        var sign = (f >> 31) & 0x0001;
-        var exp = (f >> 23) & 0x00ff;
-        var frac = f & 0x007fffff;
-
-        var newExp;
-        if (exp == 0) {
-            newExp = 0;
-        } else if (exp < 113) {
-            newExp = 0;
-            frac |= 0x00800000;
-            frac = frac >> (113 - exp);
-            if (frac & 0x01000000) {
-                newExp = 1;
-                frac = 0;
-            }
-        } else if (exp < 142) {
-            newExp = exp - 112;
-        } else {
-            newExp = 31;
-            frac = 0;
-        }
-
-        return (sign << 15) | (newExp << 10) | (frac >> 13);
-    }
-
-    function packHalf2x16(x, y) {
-        return (floatToHalf(x) | (floatToHalf(y) << 16)) >>> 0;
-    }
-
-    function generateTexture() {
-        if (!buffer) return;
-        const f_buffer = new Float32Array(buffer);
-        const u_buffer = new Uint8Array(buffer);
-
-        var texwidth = 1024 * 2; // Set to your desired width
-        var texheight = Math.ceil((2 * vertexCount) / texwidth); // Set to your desired height
-        var texdata = new Uint32Array(texwidth * texheight * 4); // 4 components per pixel (RGBA)
-        var texdata_c = new Uint8Array(texdata.buffer);
-        var texdata_f = new Float32Array(texdata.buffer);
-
-        // Here we convert from a .splat file buffer into a texture
-        // With a little bit more foresight perhaps this texture file
-        // should have been the native format as it'd be very easy to
-        // load it into webgl.
-        for (let i = 0; i < vertexCount; i++) {
-            // x, y, z
-            texdata_f[8 * i + 0] = f_buffer[8 * i + 0];
-            texdata_f[8 * i + 1] = f_buffer[8 * i + 1];
-            texdata_f[8 * i + 2] = f_buffer[8 * i + 2];
-
-            // r, g, b, a
-            texdata_c[4 * (8 * i + 7) + 0] = u_buffer[32 * i + 24 + 0];
-            texdata_c[4 * (8 * i + 7) + 1] = u_buffer[32 * i + 24 + 1];
-            texdata_c[4 * (8 * i + 7) + 2] = u_buffer[32 * i + 24 + 2];
-            texdata_c[4 * (8 * i + 7) + 3] = u_buffer[32 * i + 24 + 3];
-
-            // quaternions
-            let scale = [
-                f_buffer[8 * i + 3 + 0],
-                f_buffer[8 * i + 3 + 1],
-                f_buffer[8 * i + 3 + 2],
-            ];
-            let rot = [
-                (u_buffer[32 * i + 28 + 0] - 128) / 128,
-                (u_buffer[32 * i + 28 + 1] - 128) / 128,
-                (u_buffer[32 * i + 28 + 2] - 128) / 128,
-                (u_buffer[32 * i + 28 + 3] - 128) / 128,
-            ];
-
-            // Compute the matrix product of S and R (M = S * R)
-            const M = [
-                1.0 - 2.0 * (rot[2] * rot[2] + rot[3] * rot[3]),
-                2.0 * (rot[1] * rot[2] + rot[0] * rot[3]),
-                2.0 * (rot[1] * rot[3] - rot[0] * rot[2]),
-
-                2.0 * (rot[1] * rot[2] - rot[0] * rot[3]),
-                1.0 - 2.0 * (rot[1] * rot[1] + rot[3] * rot[3]),
-                2.0 * (rot[2] * rot[3] + rot[0] * rot[1]),
-
-                2.0 * (rot[1] * rot[3] + rot[0] * rot[2]),
-                2.0 * (rot[2] * rot[3] - rot[0] * rot[1]),
-                1.0 - 2.0 * (rot[1] * rot[1] + rot[2] * rot[2]),
-            ].map((k, i) => k * scale[Math.floor(i / 3)]);
-
-            const sigma = [
-                M[0] * M[0] + M[3] * M[3] + M[6] * M[6],
-                M[0] * M[1] + M[3] * M[4] + M[6] * M[7],
-                M[0] * M[2] + M[3] * M[5] + M[6] * M[8],
-                M[1] * M[1] + M[4] * M[4] + M[7] * M[7],
-                M[1] * M[2] + M[4] * M[5] + M[7] * M[8],
-                M[2] * M[2] + M[5] * M[5] + M[8] * M[8],
-            ];
-
-            texdata[8 * i + 4] = packHalf2x16(4 * sigma[0], 4 * sigma[1]);
-            texdata[8 * i + 5] = packHalf2x16(4 * sigma[2], 4 * sigma[3]);
-            texdata[8 * i + 6] = packHalf2x16(4 * sigma[4], 4 * sigma[5]);
-        }
-
-        self.postMessage({ texdata, texwidth, texheight }, [texdata.buffer]);
-    }
-
-    function runSort(viewProj) {
-        if (!buffer) return;
-        const f_buffer = new Float32Array(buffer);
-        if (lastVertexCount == vertexCount) {
-            let dot =
-                lastProj[2] * viewProj[2] +
-                lastProj[6] * viewProj[6] +
-                lastProj[10] * viewProj[10];
-            if (Math.abs(dot - 1) < 0.01) {
-                return;
-            }
-        } else {
-            generateTexture();
-            lastVertexCount = vertexCount;
-        }
-
-        console.time("sort");
-        let maxDepth = -Infinity;
-        let minDepth = Infinity;
-        let sizeList = new Int32Array(vertexCount);
-        for (let i = 0; i < vertexCount; i++) {
-            let depth =
-                ((viewProj[2] * f_buffer[8 * i + 0] +
-                    viewProj[6] * f_buffer[8 * i + 1] +
-                    viewProj[10] * f_buffer[8 * i + 2]) *
-                    4096) |
-                0;
-            sizeList[i] = depth;
-            if (depth > maxDepth) maxDepth = depth;
-            if (depth < minDepth) minDepth = depth;
-        }
-
-        // This is a 16 bit single-pass counting sort
-        let depthInv = (256 * 256 - 1) / (maxDepth - minDepth);
-        let counts0 = new Uint32Array(256 * 256);
-        for (let i = 0; i < vertexCount; i++) {
-            sizeList[i] = ((sizeList[i] - minDepth) * depthInv) | 0;
-            counts0[sizeList[i]]++;
-        }
-        let starts0 = new Uint32Array(256 * 256);
-        for (let i = 1; i < 256 * 256; i++)
-            starts0[i] = starts0[i - 1] + counts0[i - 1];
-        depthIndex = new Uint32Array(vertexCount);
-        for (let i = 0; i < vertexCount; i++)
-            depthIndex[starts0[sizeList[i]]++] = i;
-
-        console.timeEnd("sort");
-
-        lastProj = viewProj;
-        self.postMessage({ depthIndex, viewProj, vertexCount }, [
-            depthIndex.buffer,
-        ]);
-    }
-
-    function processPlyBuffer(inputBuffer) {
-        const ubuf = new Uint8Array(inputBuffer);
-        // 10KB ought to be enough for a header...
-        const header = new TextDecoder().decode(ubuf.slice(0, 1024 * 10));
-        const header_end = "end_header\n";
-        const header_end_index = header.indexOf(header_end);
-        if (header_end_index < 0)
-            throw new Error("Unable to read .ply file header");
-        const vertexCount = parseInt(/element vertex (\d+)\n/.exec(header)[1]);
-        console.log("Vertex Count", vertexCount);
-        let row_offset = 0,
-            offsets = {},
-            types = {};
-        const TYPE_MAP = {
-            double: "getFloat64",
-            int: "getInt32",
-            uint: "getUint32",
-            float: "getFloat32",
-            short: "getInt16",
-            ushort: "getUint16",
-            uchar: "getUint8",
-        };
-        for (let prop of header
-            .slice(0, header_end_index)
-            .split("\n")
-            .filter((k) => k.startsWith("property "))) {
-            const [p, type, name] = prop.split(" ");
-            const arrayType = TYPE_MAP[type] || "getInt8";
-            types[name] = arrayType;
-            offsets[name] = row_offset;
-            row_offset += parseInt(arrayType.replace(/[^\d]/g, "")) / 8;
-        }
-        console.log("Bytes per row", row_offset, types, offsets);
-
-        let dataView = new DataView(
-            inputBuffer,
-            header_end_index + header_end.length,
-        );
-        let row = 0;
-        const attrs = new Proxy(
-            {},
-            {
-                get(target, prop) {
-                    if (!types[prop]) throw new Error(prop + " not found");
-                    return dataView[types[prop]](
-                        row * row_offset + offsets[prop],
-                        true,
-                    );
-                },
-            },
-        );
-
-        console.time("calculate importance");
-        let sizeList = new Float32Array(vertexCount);
-        let sizeIndex = new Uint32Array(vertexCount);
-        for (row = 0; row < vertexCount; row++) {
-            sizeIndex[row] = row;
-            if (!types["scale_0"]) continue;
-            const size =
-                Math.exp(attrs.scale_0) *
-                Math.exp(attrs.scale_1) *
-                Math.exp(attrs.scale_2);
-            const opacity = 1 / (1 + Math.exp(-attrs.opacity));
-            sizeList[row] = size * opacity;
-        }
-        console.timeEnd("calculate importance");
-
-        console.time("sort");
-        sizeIndex.sort((b, a) => sizeList[a] - sizeList[b]);
-        console.timeEnd("sort");
-
-        // 6*4 + 4 + 4 = 8*4
-        // XYZ - Position (Float32)
-        // XYZ - Scale (Float32)
-        // RGBA - colors (uint8)
-        // IJKL - quaternion/rot (uint8)
-        const rowLength = 3 * 4 + 3 * 4 + 4 + 4;
-        const buffer = new ArrayBuffer(rowLength * vertexCount);
-
-        console.time("build buffer");
-        for (let j = 0; j < vertexCount; j++) {
-            row = sizeIndex[j];
-
-            const position = new Float32Array(buffer, j * rowLength, 3);
-            const scales = new Float32Array(buffer, j * rowLength + 4 * 3, 3);
-            const rgba = new Uint8ClampedArray(
-                buffer,
-                j * rowLength + 4 * 3 + 4 * 3,
-                4,
-            );
-            const rot = new Uint8ClampedArray(
-                buffer,
-                j * rowLength + 4 * 3 + 4 * 3 + 4,
-                4,
-            );
-
-            if (types["scale_0"]) {
-                const qlen = Math.sqrt(
-                    attrs.rot_0 ** 2 +
-                        attrs.rot_1 ** 2 +
-                        attrs.rot_2 ** 2 +
-                        attrs.rot_3 ** 2,
-                );
-
-                rot[0] = (attrs.rot_0 / qlen) * 128 + 128;
-                rot[1] = (attrs.rot_1 / qlen) * 128 + 128;
-                rot[2] = (attrs.rot_2 / qlen) * 128 + 128;
-                rot[3] = (attrs.rot_3 / qlen) * 128 + 128;
-
-                scales[0] = Math.exp(attrs.scale_0);
-                scales[1] = Math.exp(attrs.scale_1);
-                scales[2] = Math.exp(attrs.scale_2);
-            } else {
-                scales[0] = 0.01;
-                scales[1] = 0.01;
-                scales[2] = 0.01;
-
-                rot[0] = 255;
-                rot[1] = 0;
-                rot[2] = 0;
-                rot[3] = 0;
-            }
-
-            position[0] = attrs.x;
-            position[1] = attrs.y;
-            position[2] = attrs.z;
-
-            if (types["f_dc_0"]) {
-                const SH_C0 = 0.28209479177387814;
-                rgba[0] = (0.5 + SH_C0 * attrs.f_dc_0) * 255;
-                rgba[1] = (0.5 + SH_C0 * attrs.f_dc_1) * 255;
-                rgba[2] = (0.5 + SH_C0 * attrs.f_dc_2) * 255;
-            } else {
-                rgba[0] = attrs.red;
-                rgba[1] = attrs.green;
-                rgba[2] = attrs.blue;
-            }
-            if (types["opacity"]) {
-                rgba[3] = (1 / (1 + Math.exp(-attrs.opacity))) * 255;
-            } else {
-                rgba[3] = 255;
-            }
-        }
-        console.timeEnd("build buffer");
-        return buffer;
-    }
-
-    const throttledSort = () => {
-        if (!sortRunning) {
-            sortRunning = true;
-            let lastView = viewProj;
-            runSort(lastView);
-            setTimeout(() => {
-                sortRunning = false;
-                if (lastView !== viewProj) {
-                    throttledSort();
-                }
-            }, 0);
-        }
-    };
-
-    let sortRunning;
-    self.onmessage = (e) => {
-        if (e.data.ply) {
-            vertexCount = 0;
-            runSort(viewProj);
-            buffer = processPlyBuffer(e.data.ply);
-            vertexCount = Math.floor(buffer.byteLength / rowLength);
-            postMessage({ buffer: buffer, save: !!e.data.save });
-        } else if (e.data.buffer) {
-            buffer = e.data.buffer;
-            vertexCount = e.data.vertexCount;
-        } else if (e.data.vertexCount) {
-            vertexCount = e.data.vertexCount;
-        } else if (e.data.view) {
-            viewProj = e.data.view;
-            throttledSort();
-        }
-    };
-}
-
-const vertexShaderSource = `
-#version 300 es
-precision highp float;
-precision highp int;
-
-uniform highp usampler2D u_texture;
-uniform mat4 projection, view;
-uniform vec2 focal;
-uniform vec2 viewport;
-
-in vec2 position;
-in int index;
-
-out vec4 vColor;
-out vec2 vPosition;
-
-void main () {
-    uvec4 cen = texelFetch(u_texture, ivec2((uint(index) & 0x3ffu) << 1, uint(index) >> 10), 0);
-    vec4 cam = view * vec4(uintBitsToFloat(cen.xyz), 1);
-    vec4 pos2d = projection * cam;
-
-    float clip = 1.2 * pos2d.w;
-    if (pos2d.z < -clip || pos2d.x < -clip || pos2d.x > clip || pos2d.y < -clip || pos2d.y > clip) {
-        gl_Position = vec4(0.0, 0.0, 2.0, 1.0);
-        return;
-    }
-
-    uvec4 cov = texelFetch(u_texture, ivec2(((uint(index) & 0x3ffu) << 1) | 1u, uint(index) >> 10), 0);
-    vec2 u1 = unpackHalf2x16(cov.x), u2 = unpackHalf2x16(cov.y), u3 = unpackHalf2x16(cov.z);
-    mat3 Vrk = mat3(u1.x, u1.y, u2.x, u1.y, u2.y, u3.x, u2.x, u3.x, u3.y);
-
-    mat3 J = mat3(
-        focal.x / cam.z, 0., -(focal.x * cam.x) / (cam.z * cam.z),
-        0., -focal.y / cam.z, (focal.y * cam.y) / (cam.z * cam.z),
-        0., 0., 0.
-    );
-
-    mat3 T = transpose(mat3(view)) * J;
-    mat3 cov2d = transpose(T) * Vrk * T;
-
-    float mid = (cov2d[0][0] + cov2d[1][1]) / 2.0;
-    float radius = length(vec2((cov2d[0][0] - cov2d[1][1]) / 2.0, cov2d[0][1]));
-    float lambda1 = mid + radius, lambda2 = mid - radius;
-
-    if(lambda2 < 0.0) return;
-    vec2 diagonalVector = normalize(vec2(cov2d[0][1], lambda1 - cov2d[0][0]));
-    vec2 majorAxis = min(sqrt(2.0 * lambda1), 1024.0) * diagonalVector;
-    vec2 minorAxis = min(sqrt(2.0 * lambda2), 1024.0) * vec2(diagonalVector.y, -diagonalVector.x);
-
-    vColor = clamp(pos2d.z/pos2d.w+1.0, 0.0, 1.0) * vec4((cov.w) & 0xffu, (cov.w >> 8) & 0xffu, (cov.w >> 16) & 0xffu, (cov.w >> 24) & 0xffu) / 255.0;
-    vPosition = position;
-
-    vec2 vCenter = vec2(pos2d) / pos2d.w;
-    gl_Position = vec4(
-        vCenter
-        + position.x * majorAxis / viewport
-        + position.y * minorAxis / viewport, 0.0, 1.0);
-
-}
-`.trim();
-
-const fragmentShaderSource = `
-#version 300 es
-precision highp float;
-
-in vec4 vColor;
-in vec2 vPosition;
-
-out vec4 fragColor;
-
-void main () {
-    float A = -dot(vPosition, vPosition);
-    if (A < -4.0) discard;
-    float B = exp(A) * vColor.a;
-    fragColor = vec4(B * vColor.rgb, B);
-}
-
-`.trim();
-
-let defaultViewMatrix = [
-    0.47, 0.04, 0.88, 0, -0.11, 0.99, 0.02, 0, -0.88, -0.11, 0.47, 0, 0.07,
-    0.03, 6.55, 1,
-];
-let viewMatrix = defaultViewMatrix;
-async function main() {
-    let carousel = true;
-    const params = new URLSearchParams(location.search);
-    try {
-        viewMatrix = JSON.parse(decodeURIComponent(location.hash.slice(1)));
-        carousel = false;
-    } catch (err) {}
-    const url = new URL(
-        // "nike.splat",
-        // location.href,
-        params.get("url") || "train.splat",
-        "https://huggingface.co/cakewalk/splat-data/resolve/main/",
-    );
-    const req = await fetch(url, {
-        mode: "cors", // no-cors, *cors, same-origin
-        credentials: "omit", // include, *same-origin, omit
-    });
-    console.log(req);
-    if (req.status != 200)
-        throw new Error(req.status + " Unable to load " + req.url);
-
-    const rowLength = 3 * 4 + 3 * 4 + 4 + 4;
-    const reader = req.body.getReader();
-    let splatData = new Uint8Array(req.headers.get("content-length"));
-
-    const downsample =
-        splatData.length / rowLength > 500000 ? 1 : 1 / devicePixelRatio;
-    console.log(splatData.length / rowLength, downsample);
-
-    const worker = new Worker(
-        URL.createObjectURL(
-            new Blob(["(", createWorker.toString(), ")(self)"], {
-                type: "application/javascript",
-            }),
-        ),
-    );
-
-    const canvas = document.getElementById("canvas");
-    const fps = document.getElementById("fps");
-    const camid = document.getElementById("camid");
-
-    let projectionMatrix;
-
-    const gl = canvas.getContext("webgl2", {
-        antialias: false,
-    });
-
-    const vertexShader = gl.createShader(gl.VERTEX_SHADER);
-    gl.shaderSource(vertexShader, vertexShaderSource);
-    gl.compileShader(vertexShader);
-    if (!gl.getShaderParameter(vertexShader, gl.COMPILE_STATUS))
-        console.error(gl.getShaderInfoLog(vertexShader));
-
-    const fragmentShader = gl.createShader(gl.FRAGMENT_SHADER);
-    gl.shaderSource(fragmentShader, fragmentShaderSource);
-    gl.compileShader(fragmentShader);
-    if (!gl.getShaderParameter(fragmentShader, gl.COMPILE_STATUS))
-        console.error(gl.getShaderInfoLog(fragmentShader));
-
-    const program = gl.createProgram();
-    gl.attachShader(program, vertexShader);
-    gl.attachShader(program, fragmentShader);
-    gl.linkProgram(program);
-    gl.useProgram(program);
-
-    if (!gl.getProgramParameter(program, gl.LINK_STATUS))
-        console.error(gl.getProgramInfoLog(program));
-
-    gl.disable(gl.DEPTH_TEST); // Disable depth testing
-
-    // Enable blending
-    gl.enable(gl.BLEND);
-    gl.blendFuncSeparate(
-        gl.ONE_MINUS_DST_ALPHA,
-        gl.ONE,
-        gl.ONE_MINUS_DST_ALPHA,
-        gl.ONE,
-    );
-    gl.blendEquationSeparate(gl.FUNC_ADD, gl.FUNC_ADD);
-
-    const u_projection = gl.getUniformLocation(program, "projection");
-    const u_viewport = gl.getUniformLocation(program, "viewport");
-    const u_focal = gl.getUniformLocation(program, "focal");
-    const u_view = gl.getUniformLocation(program, "view");
-
-    // positions
-    const triangleVertices = new Float32Array([-2, -2, 2, -2, 2, 2, -2, 2]);
-    const vertexBuffer = gl.createBuffer();
-    gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);
-    gl.bufferData(gl.ARRAY_BUFFER, triangleVertices, gl.STATIC_DRAW);
-    const a_position = gl.getAttribLocation(program, "position");
-    gl.enableVertexAttribArray(a_position);
-    gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);
-    gl.vertexAttribPointer(a_position, 2, gl.FLOAT, false, 0, 0);
-
-    var texture = gl.createTexture();
-    gl.bindTexture(gl.TEXTURE_2D, texture);
-
-    var u_textureLocation = gl.getUniformLocation(program, "u_texture");
-    gl.uniform1i(u_textureLocation, 0);
-
-    const indexBuffer = gl.createBuffer();
-    const a_index = gl.getAttribLocation(program, "index");
-    gl.enableVertexAttribArray(a_index);
-    gl.bindBuffer(gl.ARRAY_BUFFER, indexBuffer);
-    gl.vertexAttribIPointer(a_index, 1, gl.INT, false, 0, 0);
-    gl.vertexAttribDivisor(a_index, 1);
-
-    const resize = () => {
-        gl.uniform2fv(u_focal, new Float32Array([camera.fx, camera.fy]));
-
-        projectionMatrix = getProjectionMatrix(
-            camera.fx,
-            camera.fy,
-            innerWidth,
-            innerHeight,
-        );
-
-        gl.uniform2fv(u_viewport, new Float32Array([innerWidth, innerHeight]));
-
-        gl.canvas.width = Math.round(innerWidth / downsample);
-        gl.canvas.height = Math.round(innerHeight / downsample);
-        gl.viewport(0, 0, gl.canvas.width, gl.canvas.height);
-
-        gl.uniformMatrix4fv(u_projection, false, projectionMatrix);
-    };
-
-    window.addEventListener("resize", resize);
-    resize();
-
-    worker.onmessage = (e) => {
-        if (e.data.buffer) {
-            splatData = new Uint8Array(e.data.buffer);
-            if (e.data.save) {
-                const blob = new Blob([splatData.buffer], {
-                    type: "application/octet-stream",
-                });
-                const link = document.createElement("a");
-                link.download = "model.splat";
-                link.href = URL.createObjectURL(blob);
-                document.body.appendChild(link);
-                link.click();
-            }
-        } else if (e.data.texdata) {
-            const { texdata, texwidth, texheight } = e.data;
-            // console.log(texdata)
-            gl.bindTexture(gl.TEXTURE_2D, texture);
-            gl.texParameteri(
-                gl.TEXTURE_2D,
-                gl.TEXTURE_WRAP_S,
-                gl.CLAMP_TO_EDGE,
-            );
-            gl.texParameteri(
-                gl.TEXTURE_2D,
-                gl.TEXTURE_WRAP_T,
-                gl.CLAMP_TO_EDGE,
-            );
-            gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
-            gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
-
-            gl.texImage2D(
-                gl.TEXTURE_2D,
-                0,
-                gl.RGBA32UI,
-                texwidth,
-                texheight,
-                0,
-                gl.RGBA_INTEGER,
-                gl.UNSIGNED_INT,
-                texdata,
-            );
-            gl.activeTexture(gl.TEXTURE0);
-            gl.bindTexture(gl.TEXTURE_2D, texture);
-        } else if (e.data.depthIndex) {
-            const { depthIndex, viewProj } = e.data;
-            gl.bindBuffer(gl.ARRAY_BUFFER, indexBuffer);
-            gl.bufferData(gl.ARRAY_BUFFER, depthIndex, gl.DYNAMIC_DRAW);
-            vertexCount = e.data.vertexCount;
-        }
-    };
-
-    let activeKeys = [];
-    let currentCameraIndex = 0;
-
-    window.addEventListener("keydown", (e) => {
-        // if (document.activeElement != document.body) return;
-        carousel = false;
-        if (!activeKeys.includes(e.code)) activeKeys.push(e.code);
-        if (/\d/.test(e.key)) {
-            currentCameraIndex = parseInt(e.key);
-            camera = cameras[currentCameraIndex];
-            viewMatrix = getViewMatrix(camera);
-        }
-        if (["-", "_"].includes(e.key)) {
-            currentCameraIndex =
-                (currentCameraIndex + cameras.length - 1) % cameras.length;
-            viewMatrix = getViewMatrix(cameras[currentCameraIndex]);
-        }
-        if (["+", "="].includes(e.key)) {
-            currentCameraIndex = (currentCameraIndex + 1) % cameras.length;
-            viewMatrix = getViewMatrix(cameras[currentCameraIndex]);
-        }
-        camid.innerText = "cam  " + currentCameraIndex;
-        if (e.code == "KeyV") {
-            location.hash =
-                "#" +
-                JSON.stringify(
-                    viewMatrix.map((k) => Math.round(k * 100) / 100),
-                );
-            camid.innerText = "";
-        } else if (e.code === "KeyP") {
-            carousel = true;
-            camid.innerText = "";
-        }
-    });
-    window.addEventListener("keyup", (e) => {
-        activeKeys = activeKeys.filter((k) => k !== e.code);
-    });
-    window.addEventListener("blur", () => {
-        activeKeys = [];
-    });
-
-    window.addEventListener(
-        "wheel",
-        (e) => {
-            carousel = false;
-            e.preventDefault();
-            const lineHeight = 10;
-            const scale =
-                e.deltaMode == 1
-                    ? lineHeight
-                    : e.deltaMode == 2
-                      ? innerHeight
-                      : 1;
-            let inv = invert4(viewMatrix);
-            if (e.shiftKey) {
-                inv = translate4(
-                    inv,
-                    (e.deltaX * scale) / innerWidth,
-                    (e.deltaY * scale) / innerHeight,
-                    0,
-                );
-            } else if (e.ctrlKey || e.metaKey) {
-                // inv = rotate4(inv,  (e.deltaX * scale) / innerWidth,  0, 0, 1);
-                // inv = translate4(inv,  0, (e.deltaY * scale) / innerHeight, 0);
-                // let preY = inv[13];
-                inv = translate4(
-                    inv,
-                    0,
-                    0,
-                    (-10 * (e.deltaY * scale)) / innerHeight,
-                );
-                // inv[13] = preY;
-            } else {
-                let d = 4;
-                inv = translate4(inv, 0, 0, d);
-                inv = rotate4(inv, -(e.deltaX * scale) / innerWidth, 0, 1, 0);
-                inv = rotate4(inv, (e.deltaY * scale) / innerHeight, 1, 0, 0);
-                inv = translate4(inv, 0, 0, -d);
-            }
-
-            viewMatrix = invert4(inv);
-        },
-        { passive: false },
-    );
-
-    let startX, startY, down;
-    canvas.addEventListener("mousedown", (e) => {
-        carousel = false;
-        e.preventDefault();
-        startX = e.clientX;
-        startY = e.clientY;
-        down = e.ctrlKey || e.metaKey ? 2 : 1;
-    });
-    canvas.addEventListener("contextmenu", (e) => {
-        carousel = false;
-        e.preventDefault();
-        startX = e.clientX;
-        startY = e.clientY;
-        down = 2;
-    });
-
-    canvas.addEventListener("mousemove", (e) => {
-        e.preventDefault();
-        if (down == 1) {
-            let inv = invert4(viewMatrix);
-            let dx = (5 * (e.clientX - startX)) / innerWidth;
-            let dy = (5 * (e.clientY - startY)) / innerHeight;
-            let d = 4;
-
-            inv = translate4(inv, 0, 0, d);
-            inv = rotate4(inv, dx, 0, 1, 0);
-            inv = rotate4(inv, -dy, 1, 0, 0);
-            inv = translate4(inv, 0, 0, -d);
-            // let postAngle = Math.atan2(inv[0], inv[10])
-            // inv = rotate4(inv, postAngle - preAngle, 0, 0, 1)
-            // console.log(postAngle)
-            viewMatrix = invert4(inv);
-
-            startX = e.clientX;
-            startY = e.clientY;
-        } else if (down == 2) {
-            let inv = invert4(viewMatrix);
-            // inv = rotateY(inv, );
-            // let preY = inv[13];
-            inv = translate4(
-                inv,
-                (-10 * (e.clientX - startX)) / innerWidth,
-                0,
-                (10 * (e.clientY - startY)) / innerHeight,
-            );
-            // inv[13] = preY;
-            viewMatrix = invert4(inv);
-
-            startX = e.clientX;
-            startY = e.clientY;
-        }
-    });
-    canvas.addEventListener("mouseup", (e) => {
-        e.preventDefault();
-        down = false;
-        startX = 0;
-        startY = 0;
-    });
-
-    let altX = 0,
-        altY = 0;
-    canvas.addEventListener(
-        "touchstart",
-        (e) => {
-            e.preventDefault();
-            if (e.touches.length === 1) {
-                carousel = false;
-                startX = e.touches[0].clientX;
-                startY = e.touches[0].clientY;
-                down = 1;
-            } else if (e.touches.length === 2) {
-                // console.log('beep')
-                carousel = false;
-                startX = e.touches[0].clientX;
-                altX = e.touches[1].clientX;
-                startY = e.touches[0].clientY;
-                altY = e.touches[1].clientY;
-                down = 1;
-            }
-        },
-        { passive: false },
-    );
-    canvas.addEventListener(
-        "touchmove",
-        (e) => {
-            e.preventDefault();
-            if (e.touches.length === 1 && down) {
-                let inv = invert4(viewMatrix);
-                let dx = (4 * (e.touches[0].clientX - startX)) / innerWidth;
-                let dy = (4 * (e.touches[0].clientY - startY)) / innerHeight;
-
-                let d = 4;
-                inv = translate4(inv, 0, 0, d);
-                // inv = translate4(inv,  -x, -y, -z);
-                // inv = translate4(inv,  x, y, z);
-                inv = rotate4(inv, dx, 0, 1, 0);
-                inv = rotate4(inv, -dy, 1, 0, 0);
-                inv = translate4(inv, 0, 0, -d);
-
-                viewMatrix = invert4(inv);
-
-                startX = e.touches[0].clientX;
-                startY = e.touches[0].clientY;
-            } else if (e.touches.length === 2) {
-                // alert('beep')
-                const dtheta =
-                    Math.atan2(startY - altY, startX - altX) -
-                    Math.atan2(
-                        e.touches[0].clientY - e.touches[1].clientY,
-                        e.touches[0].clientX - e.touches[1].clientX,
-                    );
-                const dscale =
-                    Math.hypot(startX - altX, startY - altY) /
-                    Math.hypot(
-                        e.touches[0].clientX - e.touches[1].clientX,
-                        e.touches[0].clientY - e.touches[1].clientY,
-                    );
-                const dx =
-                    (e.touches[0].clientX +
-                        e.touches[1].clientX -
-                        (startX + altX)) /
-                    2;
-                const dy =
-                    (e.touches[0].clientY +
-                        e.touches[1].clientY -
-                        (startY + altY)) /
-                    2;
-                let inv = invert4(viewMatrix);
-                // inv = translate4(inv,  0, 0, d);
-                inv = rotate4(inv, dtheta, 0, 0, 1);
-
-                inv = translate4(inv, -dx / innerWidth, -dy / innerHeight, 0);
-
-                // let preY = inv[13];
-                inv = translate4(inv, 0, 0, 3 * (1 - dscale));
-                // inv[13] = preY;
-
-                viewMatrix = invert4(inv);
-
-                startX = e.touches[0].clientX;
-                altX = e.touches[1].clientX;
-                startY = e.touches[0].clientY;
-                altY = e.touches[1].clientY;
-            }
-        },
-        { passive: false },
-    );
-    canvas.addEventListener(
-        "touchend",
-        (e) => {
-            e.preventDefault();
-            down = false;
-            startX = 0;
-            startY = 0;
-        },
-        { passive: false },
-    );
-
-    let jumpDelta = 0;
-    let vertexCount = 0;
-
-    let lastFrame = 0;
-    let avgFps = 0;
-    let start = 0;
-
-    window.addEventListener("gamepadconnected", (e) => {
-        const gp = navigator.getGamepads()[e.gamepad.index];
-        console.log(
-            `Gamepad connected at index ${gp.index}: ${gp.id}. It has ${gp.buttons.length} buttons and ${gp.axes.length} axes.`,
-        );
-    });
-    window.addEventListener("gamepaddisconnected", (e) => {
-        console.log("Gamepad disconnected");
-    });
-
-    let leftGamepadTrigger, rightGamepadTrigger;
-
-    const frame = (now) => {
-        let inv = invert4(viewMatrix);
-        let shiftKey =
-            activeKeys.includes("Shift") ||
-            activeKeys.includes("ShiftLeft") ||
-            activeKeys.includes("ShiftRight");
-
-        if (activeKeys.includes("ArrowUp")) {
-            if (shiftKey) {
-                inv = translate4(inv, 0, -0.03, 0);
-            } else {
-                inv = translate4(inv, 0, 0, 0.1);
-            }
-        }
-        if (activeKeys.includes("ArrowDown")) {
-            if (shiftKey) {
-                inv = translate4(inv, 0, 0.03, 0);
-            } else {
-                inv = translate4(inv, 0, 0, -0.1);
-            }
-        }
-        if (activeKeys.includes("ArrowLeft"))
-            inv = translate4(inv, -0.03, 0, 0);
-        //
-        if (activeKeys.includes("ArrowRight"))
-            inv = translate4(inv, 0.03, 0, 0);
-        // inv = rotate4(inv, 0.01, 0, 1, 0);
-        if (activeKeys.includes("KeyA")) inv = rotate4(inv, -0.01, 0, 1, 0);
-        if (activeKeys.includes("KeyD")) inv = rotate4(inv, 0.01, 0, 1, 0);
-        if (activeKeys.includes("KeyQ")) inv = rotate4(inv, 0.01, 0, 0, 1);
-        if (activeKeys.includes("KeyE")) inv = rotate4(inv, -0.01, 0, 0, 1);
-        if (activeKeys.includes("KeyW")) inv = rotate4(inv, 0.005, 1, 0, 0);
-        if (activeKeys.includes("KeyS")) inv = rotate4(inv, -0.005, 1, 0, 0);
-
-        const gamepads = navigator.getGamepads ? navigator.getGamepads() : [];
-        let isJumping = activeKeys.includes("Space");
-        for (let gamepad of gamepads) {
-            if (!gamepad) continue;
-
-            const axisThreshold = 0.1; // Threshold to detect when the axis is intentionally moved
-            const moveSpeed = 0.06;
-            const rotateSpeed = 0.02;
-
-            // Assuming the left stick controls translation (axes 0 and 1)
-            if (Math.abs(gamepad.axes[0]) > axisThreshold) {
-                inv = translate4(inv, moveSpeed * gamepad.axes[0], 0, 0);
-                carousel = false;
-            }
-            if (Math.abs(gamepad.axes[1]) > axisThreshold) {
-                inv = translate4(inv, 0, 0, -moveSpeed * gamepad.axes[1]);
-                carousel = false;
-            }
-            if (gamepad.buttons[12].pressed || gamepad.buttons[13].pressed) {
-                inv = translate4(
-                    inv,
-                    0,
-                    -moveSpeed *
-                        (gamepad.buttons[12].pressed -
-                            gamepad.buttons[13].pressed),
-                    0,
-                );
-                carousel = false;
-            }
-
-            if (gamepad.buttons[14].pressed || gamepad.buttons[15].pressed) {
-                inv = translate4(
-                    inv,
-                    -moveSpeed *
-                        (gamepad.buttons[14].pressed -
-                            gamepad.buttons[15].pressed),
-                    0,
-                    0,
-                );
-                carousel = false;
-            }
-
-            // Assuming the right stick controls rotation (axes 2 and 3)
-            if (Math.abs(gamepad.axes[2]) > axisThreshold) {
-                inv = rotate4(inv, rotateSpeed * gamepad.axes[2], 0, 1, 0);
-                carousel = false;
-            }
-            if (Math.abs(gamepad.axes[3]) > axisThreshold) {
-                inv = rotate4(inv, -rotateSpeed * gamepad.axes[3], 1, 0, 0);
-                carousel = false;
-            }
-
-            let tiltAxis = gamepad.buttons[6].value - gamepad.buttons[7].value;
-            if (Math.abs(tiltAxis) > axisThreshold) {
-                inv = rotate4(inv, rotateSpeed * tiltAxis, 0, 0, 1);
-                carousel = false;
-            }
-            if (gamepad.buttons[4].pressed && !leftGamepadTrigger) {
-                camera =
-                    cameras[(cameras.indexOf(camera) + 1) % cameras.length];
-                inv = invert4(getViewMatrix(camera));
-                carousel = false;
-            }
-            if (gamepad.buttons[5].pressed && !rightGamepadTrigger) {
-                camera =
-                    cameras[
-                        (cameras.indexOf(camera) + cameras.length - 1) %
-                            cameras.length
-                    ];
-                inv = invert4(getViewMatrix(camera));
-                carousel = false;
-            }
-            leftGamepadTrigger = gamepad.buttons[4].pressed;
-            rightGamepadTrigger = gamepad.buttons[5].pressed;
-            if (gamepad.buttons[0].pressed) {
-                isJumping = true;
-                carousel = false;
-            }
-            if (gamepad.buttons[3].pressed) {
-                carousel = true;
-            }
-        }
-
-        if (
-            ["KeyJ", "KeyK", "KeyL", "KeyI"].some((k) => activeKeys.includes(k))
-        ) {
-            let d = 4;
-            inv = translate4(inv, 0, 0, d);
-            inv = rotate4(
-                inv,
-                activeKeys.includes("KeyJ")
-                    ? -0.05
-                    : activeKeys.includes("KeyL")
-                      ? 0.05
-                      : 0,
-                0,
-                1,
-                0,
-            );
-            inv = rotate4(
-                inv,
-                activeKeys.includes("KeyI")
-                    ? 0.05
-                    : activeKeys.includes("KeyK")
-                      ? -0.05
-                      : 0,
-                1,
-                0,
-                0,
-            );
-            inv = translate4(inv, 0, 0, -d);
-        }
-
-        viewMatrix = invert4(inv);
-
-        if (carousel) {
-            let inv = invert4(defaultViewMatrix);
-
-            const t = Math.sin((Date.now() - start) / 5000);
-            inv = translate4(inv, 2.5 * t, 0, 6 * (1 - Math.cos(t)));
-            inv = rotate4(inv, -0.6 * t, 0, 1, 0);
-
-            viewMatrix = invert4(inv);
-        }
-
-        if (isJumping) {
-            jumpDelta = Math.min(1, jumpDelta + 0.05);
-        } else {
-            jumpDelta = Math.max(0, jumpDelta - 0.05);
-        }
-
-        let inv2 = invert4(viewMatrix);
-        inv2 = translate4(inv2, 0, -jumpDelta, 0);
-        inv2 = rotate4(inv2, -0.1 * jumpDelta, 1, 0, 0);
-        let actualViewMatrix = invert4(inv2);
-
-        const viewProj = multiply4(projectionMatrix, actualViewMatrix);
-        worker.postMessage({ view: viewProj });
-
-        const currentFps = 1000 / (now - lastFrame) || 0;
-        avgFps = avgFps * 0.9 + currentFps * 0.1;
-
-        if (vertexCount > 0) {
-            document.getElementById("spinner").style.display = "none";
-            gl.uniformMatrix4fv(u_view, false, actualViewMatrix);
-            gl.clear(gl.COLOR_BUFFER_BIT);
-            gl.drawArraysInstanced(gl.TRIANGLE_FAN, 0, 4, vertexCount);
-        } else {
-            gl.clear(gl.COLOR_BUFFER_BIT);
-            document.getElementById("spinner").style.display = "";
-            start = Date.now() + 2000;
-        }
-        const progress = (100 * vertexCount) / (splatData.length / rowLength);
-        if (progress < 100) {
-            document.getElementById("progress").style.width = progress + "%";
-        } else {
-            document.getElementById("progress").style.display = "none";
-        }
-        fps.innerText = Math.round(avgFps) + " fps";
-        if (isNaN(currentCameraIndex)) {
-            camid.innerText = "";
-        }
-        lastFrame = now;
-        requestAnimationFrame(frame);
-    };
-
-    frame();
-
-    const isPly = (splatData) =>
-        splatData[0] == 112 &&
-        splatData[1] == 108 &&
-        splatData[2] == 121 &&
-        splatData[3] == 10;
-
-    const selectFile = (file) => {
-        const fr = new FileReader();
-        if (/\.json$/i.test(file.name)) {
-            fr.onload = () => {
-                cameras = JSON.parse(fr.result);
-                viewMatrix = getViewMatrix(cameras[0]);
-                projectionMatrix = getProjectionMatrix(
-                    camera.fx / downsample,
-                    camera.fy / downsample,
-                    canvas.width,
-                    canvas.height,
-                );
-                gl.uniformMatrix4fv(u_projection, false, projectionMatrix);
-
-                console.log("Loaded Cameras");
-            };
-            fr.readAsText(file);
-        } else {
-            stopLoading = true;
-            fr.onload = () => {
-                splatData = new Uint8Array(fr.result);
-                console.log("Loaded", Math.floor(splatData.length / rowLength));
-
-                if (isPly(splatData)) {
-                    // ply file magic header means it should be handled differently
-                    worker.postMessage({ ply: splatData.buffer, save: true });
-                } else {
-                    worker.postMessage({
-                        buffer: splatData.buffer,
-                        vertexCount: Math.floor(splatData.length / rowLength),
-                    });
-                }
-            };
-            fr.readAsArrayBuffer(file);
-        }
-    };
-
-    window.addEventListener("hashchange", (e) => {
-        try {
-            viewMatrix = JSON.parse(decodeURIComponent(location.hash.slice(1)));
-            carousel = false;
-        } catch (err) {}
-    });
-
-    const preventDefault = (e) => {
-        e.preventDefault();
-        e.stopPropagation();
-    };
-    document.addEventListener("dragenter", preventDefault);
-    document.addEventListener("dragover", preventDefault);
-    document.addEventListener("dragleave", preventDefault);
-    document.addEventListener("drop", (e) => {
-        e.preventDefault();
-        e.stopPropagation();
-        selectFile(e.dataTransfer.files[0]);
-    });
-
-    let bytesRead = 0;
-    let lastVertexCount = -1;
-    let stopLoading = false;
-
-    while (true) {
-        const { done, value } = await reader.read();
-        if (done || stopLoading) break;
-
-        splatData.set(value, bytesRead);
-        bytesRead += value.length;
-
-        if (vertexCount > lastVertexCount) {
-            if (!isPly(splatData)) {
-                worker.postMessage({
-                    buffer: splatData.buffer,
-                    vertexCount: Math.floor(bytesRead / rowLength),
-                });
-            }
-            lastVertexCount = vertexCount;
-        }
-    }
-    if (!stopLoading) {
-        if (isPly(splatData)) {
-            // ply file magic header means it should be handled differently
-            worker.postMessage({ ply: splatData.buffer, save: false });
-        } else {
-            worker.postMessage({
-                buffer: splatData.buffer,
-                vertexCount: Math.floor(bytesRead / rowLength),
-            });
-        }
-    }
-}
-
-main().catch((err) => {
-    document.getElementById("spinner").style.display = "none";
-    document.getElementById("message").innerText = err.toString();
-});