glTF Skinned Mesh — Two-joint Bend (JSON)
The same two-joint skinned bend as readable glTF JSON with its buffer embedded as a base64 data URI — the file to open in a text editor when a GLB's skin, sampler or inverse bind matrices are not doing what you expect.
Interactive preview rendered from the equivalent glTF (skinned-two-bone.glb); drag to orbit. Download the file above for the GLTF original.
Specifications
- Format
- glTF 2.0 (JSON + base64 buffer)
- Joints
- 2
- Animations
- 1
- Buffer Storage
- data URI
- Readable
- true
Testing contract
Reference control- Scenario
- Diff this JSON against the GLB twin's JSON chunk after decoding both, to confirm a GLB packer preserved the skin, samplers and accessor layout.
- Expected result
- Both documents declare the same skin, the same two joints and the same animation channels; only the buffer's storage differs.
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 Skinned Mesh — Two-joint Bend (JSON)” is a deterministic Novus Examples fixture for Conversion 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 (JSON + base64 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("skinned-two-bone.gltf")
print(mesh.bounds, mesh.faces.shape)Related files
- glbglTF Animation — Four Channels Across Two Nodes (GLB)A single animation whose four channels drive two nodes at once: the parent's translation, rotation and scale, and a spinning child that inherits all of it. The fixture for checking that channels are applied per node and per path rather than collapsed into one track.
- glbglTF Node Animation — CUBICSPLINE Sampler (GLB)One cube on one node, with translation, rotation and scale each driven by a five-key sampler that is cubic-spline, with in/out tangents stored around each value. Three files differing only in `interpolation` — the cleanest way to prove an animation player implements all three modes rather than treating everything as linear.
- glbglTF Node Animation — LINEAR Sampler (GLB)One cube on one node, with translation, rotation and scale each driven by a five-key sampler that is linearly interpolated. Three files differing only in `interpolation` — the cleanest way to prove an animation player implements all three modes rather than treating everything as linear.
- glbglTF Node Animation — STEP Sampler (GLB)One cube on one node, with translation, rotation and scale each driven by a five-key sampler that is held (STEP) — the value jumps at each key. Three files differing only in `interpolation` — the cleanest way to prove an animation player implements all three modes rather than treating everything as linear.
- 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.
Generated by generation/models_p7.py. Free for any use, no attribution required — license.