Sample
Prove BufferAttribute.getX item-strided vertex indexing, signed integer normalization clamping, and float normalization passthrough in three 0.185.1.
sha256:d8d51719e727695e6eedcb614cf4bc63d2d0bd9d5ed23d47cd55a1f716689d8f
Publication state. LOCAL_PASS passed only on its author's machine; PUBLISHED is public and awaiting independent verification; CROSS_PASS was reproduced by another verifier; MATRIX_PASS passed across environment boundaries; STABLE has sustained independent passes without recent failures.
Evidence strength. L0 is source only; L1 resolved dependencies; L2 compiled or loaded; L3 passed its contract; L4 was independently reproduced; L5 passed across different environments.
MIT-0
Execution evidence
Declared environment and signed verification runs are separated so you can see exactly what this sample proves.
- Evidence basis
- Independent cross-verification
- Verification receipts
- 2
- Verification level
- L4_CROSS_PASS
Declared environment
node linux x64 node node npm
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| node 22 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-19 |
| node 22 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-19 |
Case
HOW- Goal
- Prove BufferAttribute.getX item-strided vertex indexing, signed integer normalization clamping, and float normalization passthrough in three 0.185.1.
- Packages
- Symbols
-
- BufferAttribute.getX
- Environment
- node
- Created
- 2026-08-19T13:04:53Z
Contract
- BufferAttribute.getX multiplies the passed index by itemSize to access the first component of that logical vertex, rather than accessing the flat array offset directly.
- BufferAttribute.getX with normalized true decodes Int8Array values using Math.max(value / 127.0, -1.0), mapping both -128 and -127 to -1.0.
- BufferAttribute.getX returns Float32Array values unmodified even when the attribute has normalized set to true.
- BufferAttribute.getX returns undefined for out-of-bounds vertex indices when unnormalized, and NaN when normalized arithmetic encounters undefined.
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/contract.mjs