# glTF Writer

gl Transmission Format
File Extension | glTF, GLB
Supported Versions | 2.0
Platforms |
Tessellation |
B-rep | N/A
PMI | N/A
Assembly | N/A
Views | N/A

The glTF (GL Transmission Format) file format was created by the Khronos Group in 2015. It is an open standard for 3D scenes and models, designed to be efficient and widely supported across platforms.

The file extensions that you can create when you export to glTF are

- .gltf
- .glb

HOOPS Exchange geometry access for glTF includes:

- Tessellation: Can be written by HOOPS Exchange for visualization.
- B-rep: This format does not support B-rep

## Physically-Based Rendering Material

As of version 2019 HOOPS Exchange now supports physically based rendering (PBR) materials with A3DGraphMaterialData structure. PBR related information are read from glTF formats.

## Miscellaneous

Supported

- Version 2.0 files only (tinygltf limitation; only “asset” data is correctly parsed from 1.0 files)
- Vertex position, normal, color, texture coordinate sets 0 and 1
- Triangles
- Full texture support and material data: normal, occlusion, emissive
- Physically Based Rendering (PBR) textures and constants: base color, metallness, roughness
- Texture file formats: JPEG, PNG, BMP, GIF (handled by tinygltf)
- Cameras
- Wireframe

Unsupported

- Version 1.0 files
- Vertex tangents
- Animations
- Skins
- Extensions
- Shaders
- Sparse accessors (currently not supported by tinygltf)
- Byte-swapping for Big-Endian platforms

## Assembly

This concept is not supported by glTF.

## B-rep

This concept is not supported by glTF.

## Views

This concept is not supported by glTF.

Conversation saved
HOOPSY BETA

### Hello! I'm HOOPSY

Your multilingual generative AI assistant for documentation. Ask me anything about HOOPS Exchange in your own language, or choose a sample question below to start a conversation:

What is HOOPS Exchange?
What are the latest release notes for HOOPS Exchange?
How do I start evaluating HOOPS Exchange?
How do I write my first sample application?
How can I get assistance?

HOOPSY may store conversations according to OpenAI's policy. Responses may not always be accurate.

HOOPSY is thinking...