glTF: JSON Cube (embedded)
A 10 mm cube as text glTF 2.0: the JSON scene with its binary buffer embedded as a data URI, the human-readable sibling of the GLB. For testing glTF parsers and GLB↔glTF conversion.
Interactive preview rendered from the equivalent glTF (cube.glb); drag to orbit. Download the file above for the GLTF original.
Specifications
- Format
- glTF 2.0 (JSON + embedded buffer)
- Solid
- 10 mm cube
- Triangles
- 12
- Vertices
- 24
- Units
- mm
Testing contract
Expected to pass- Scenario
- Exercise glTF: JSON Cube (embedded) in its mesh workflow. A 10 mm cube as text glTF 2.0: the JSON scene with its binary buffer embedded as a data URI, the human-readable sibling of the GLB.
- Expected result
- 90 text lines, decoded as UTF-8; first nonempty line is '{'. Declared feature checks: solid=10 mm cube; triangles=12; vertices=24; units=mm.
What is a .gltf file?
glTF (.gltf, GL Transmission Format) is the 'JPEG of 3D', a JSON scene description referencing geometry, PBR materials, textures, and animation, with binary buffers stored alongside or as a .bin. It is the standard for web and real-time 3D.
How to use this file
Use an example .gltf file to test glTF loaders (three.js, model-viewer), PBR material handling, and glTF-to-GLB packing.
How to use this file for testing
“glTF: JSON Cube (embedded)” is a deterministic Testaroo fixture for Conversion testing. The same content exported across many formats and linked as a group, so you can convert one and diff against the expected twin.
Documented properties for this file: glTF 2.0 (JSON + embedded buffer). Compare results against paired or grouped companions on this page when present (clean↔damaged, searchable↔scanned, or format twins) so scores stay reproducible across runs.
Download the file once, keep the path stable in CI or local scripts, and treat the spec table as the contract: dimensions, seeds, field lists, and roles are intentional. Corrupt or invalid samples are labelled as such, expect parsers to fail loudly rather than silently accept them.
3D and CAD fixtures carry one small, documented solid or scene. Convert and inspect against the known geometry, units, and structure; format twins let you diff interchange fidelity, and the 3D viewer previews the actual mesh.
Code examples
import trimesh # pip install trimesh
mesh = trimesh.load("cube.gltf")
print(mesh.bounds, mesh.faces.shape)Generated by generation/models.py. Free for any use, no attribution required, license.
Related files
- binBIN: glTF Buffer CompanionBinary buffer companion for the textured mini glTF (positions, UVs, indices).
- binBIN: glTF External Buffer PayloadThe binary payload the external-buffer glTF in this group points at: tightly-packed positions, normals and indices with 4-byte alignment padding. Not viewable on its own: its bufferViews live in the JSON.
- jsonConvert v2 3DS Semantic Geometry ReferenceJSON semantic reference for the 3DS tetrahedron, publishing vertex order, face indices, bounds, and the closed-mesh contract. Stable P8 artifact p8-convert-model-3ds-reference.
- jsonConvert v2 AMF Semantic Geometry ReferenceJSON semantic reference for the AMF tetrahedron, publishing vertex order, face indices, bounds, and the closed-mesh contract. Stable P8 artifact p8-convert-model-amf-reference.
- jsonConvert v2 DRC Semantic Geometry ReferenceJSON semantic reference for the DRC tetrahedron, publishing vertex order, face indices, bounds, and the closed-mesh contract. Stable P8 artifact p8-convert-model-drc-reference.
- jsonConvert v2 FBX Semantic Geometry ReferenceJSON semantic reference for the FBX tetrahedron, publishing vertex order, face indices, bounds, and the closed-mesh contract. Stable P8 artifact p8-convert-model-fbx-reference.
