#3D #asset #generator #glTF #VTK

app gltfgen

Command line tool for generating glTF 2.0 animations from numbered sequences of mesh files

5 releases

✓ Uses Rust 2018 edition

0.4.3 Jan 26, 2020
0.4.2 Jan 18, 2020
0.4.1 Dec 23, 2019
0.4.0 Dec 23, 2019
0.3.0 Dec 20, 2019

#4 in Data formats

43 downloads per month

MPL-2.0 license

1.5K SLoC


A command line tool for generating glTF 2.0 animations from numbered sequences of mesh files.


The latest gltfgen builds are available via

> cargo install gltfgen

For special builds see Releases.

The following is the most basic usage pattern:

  • <OUTPUT> Output glTF file

  • <PATTERN> A glob pattern matching files to be included in the generated glTF document. Use # to match a frame number. Use '{' and '}' to select parts of the pattern to be used to name meshes in the output glTF.

Run gltfgen -h for more options and gltfgen --help for full details.


The following example assumes that there is a sequence of meshes located at ./meshes/animation_#.vtk where # represents the frame number. To generate an animated binary glTF file named output.glb in the current directory, run:

> gltfgen output.glb "./meshes/animation_#.vtk"

This will assume a time step of 1 second between frames. To specify a time step like 0.01 seconds between frames, use

> gltfgen -t 0.01 output.glb "./meshes/animation_#.vtk"

Alternatively, you may produce the same result by specifying the number of frames per second (FPS) using

> gltfgen -f 100 output.glb "./meshes/animation_#.vtk"


Input Types

  • Unstructured Legacy VTK polygon and tetrahedral meshes in double or float format. Tetrahedral VTK meshes are converted to triangle meshes on the fly.
  • JPEG and PNG image textures are supported.

Output Types

  • glTF 2.0 in binary and standard formats.

Other Features

  • Multiple mesh file sequences can be embedded into a single glTF file automatically.
  • Non-numbered mesh files will be placed at frame 0 if captured by the glob pattern.
  • Skip frames with -s flag to reduce file size and improve performance.
  • Images textures can be referenced or embedded directly into the glTF file.
  • Full support for
    • color attributes,
    • texture attributes,
    • custom attributes,
  • Full support for textures.
  • Material attribute on vtk primitives is used to reference specific materials provided on the command line.


This repository is licensed under the Mozilla Public License, v. 2.0.


See CONTRIBUTING.md for details.


~188K SLoC