Can I support ply export splat files

[chaoyang915506]

I saw downloadFile under ksplatloader. js file to download ksplat file directly. SplatLoader.js I tried to add downloadFile method under KSplatLoader and found that the exported splat could not be used. I want to export a splat file.

[mkkellogg]

Currently I don't have any way to export to .splat format in my viewer. What is your source format? You can always use the antimatter15 viewer or SuperSplat to export to .splat.

[chaoyang915506]

https://huggingface.co/spaces/dylanebert/gsplat-editor
Ok, my source data is ply format files, it would be great if I could export ply and splat based on the rendered content just like the site in the link.

[gotoeasy]

https://huggingface.co/spaces/dylanebert/gsplat-editor
Ok, my source data is ply format files, it would be great if I could export ply and splat based on the rendered content just like the site in the link.

# 3dgs ply to splat
gsbox -i /path/to/input.ply -o /path/to/output.splat

# splat to 3dgs ply
gsbox -i /path/to/input.splat -o /path/to/output.ply

https://github.com/gotoeasy/gsbox

[FanYaning]

from plyfile import PlyData
import numpy as np
from io import BytesIO
def process_ply_to_splat(ply_file_path, splat_file_path):
    plydata = PlyData.read(ply_file_path)
    vert = plydata["vertex"]
    buffer = BytesIO()
    SH_C0 = 0.28209479177387814
    for v in vert:
        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,
        )
        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()
        )
        with open(splat_file_path, "wb") as f:
            f.write(buffer.getvalue())
        buffer.close()