GLB — Signpost authored in Millimetres
A 1.12 m signpost with its coordinates written in millimetres — so this file's numbers read up to 1120. glTF has no unit field: the spec simply says metres, which means a wrongly-scaled export is indistinguishable from a genuinely enormous model until something is measured.
Specifications
- Format
- glTF 2.0 binary (GLB)
- Authored Unit
- millimetres
- Model Height
- 1120
- Spec Unit
- metre
- Scale To Metres
- 0.001
- Conforms
- false
- Note
- 1000x too large for a glTF consumer
Testing contract
Expected to recover- Scenario
- Import into a metre-based engine and measure the signpost's height without applying any scale.
- Expected result
- 1120 units instead of 1.12 — the import needs a 0.001 scale factor, and nothing in the file will tell you that
What is a .glb file?
GLB is the binary form of glTF, packaging 3D scene geometry, materials, textures, animations, and node hierarchy into a single self-contained file. It is optimized for efficient runtime loading and is often called the JPEG of 3D. It is widely used in web, AR, and real-time 3D applications.
How to use this file
Use an example GLB to test glTF loaders, embedded-texture and animation handling, and real-time rendering pipelines in web or game engines.
How to use this file for testing
“GLB — Signpost authored in Millimetres” is a deterministic Novus Examples fixture for Conversion testing, Metadata testing, Mesh processing QA. 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 binary (GLB). 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("signpost-millimetre.glb")
print(mesh.bounds, mesh.faces.shape)Related files
- daeDAE — Signpost, Y_UP declaredThe same signpost as COLLADA with `<up_axis>Y_UP</up_axis>` and `<unit meter="1" name="metre"/>` in its asset block. Unlike glTF, OBJ and STL, COLLADA states its convention — so an importer that still gets the orientation wrong has no excuse.
- daeDAE — Signpost, Z_UP declaredThe same signpost as COLLADA with `<up_axis>Z_UP</up_axis>` and `<unit meter="1" name="metre"/>` in its asset block. Unlike glTF, OBJ and STL, COLLADA states its convention — so an importer that still gets the orientation wrong has no excuse.
- glbGLB — Signpost, Y-upThe signpost authored +Y up, which is what the glTF specification mandates and what every conformant viewer assumes. The conformant half of the axis pair: load it, confirm the post stands, and you have calibrated your viewer before testing the Z-up twin.
- glbGLB — Signpost, Z-upThe same signpost authored +Z up — what a Blender or 3ds Max glTF export produces when the axis conversion is skipped. glTF has no field in which to declare this, so the file is indistinguishable from a model that genuinely lies on its back, and every conformant viewer will show it that way.
- plyPLY — Signpost, +Y up (comment only)The signpost as ASCII PLY with +Y up. PLY has no axis or unit element, so the convention survives only as a header comment that no parser reads — the reason scan data so often arrives rotated.
- plyPLY — Signpost, +Z up (comment only)The signpost as ASCII PLY with +Z up. PLY has no axis or unit element, so the convention survives only as a header comment that no parser reads — the reason scan data so often arrives rotated.
Generated by generation/models_p7.py. Free for any use, no attribution required — license.