Sample
MeshSurfaceSampler.sample populates target position, normal, color, and UV vectors in place and returns the sampler instance itself rather than a new point object.
sha256:37f8aea1060a00ee39671b0525ce4ffb4acbd57858a862d0b15c3874e09b1eca
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Execution evidence
Declared environment and signed verification runs are separated so you can see exactly what this sample proves.
Evidence basisSigned contract pass
Verification receipts1
Verification levelL3_CONTRACT_PASS
Declared environment
- Execution context
- node
- Operating system
- linux
- Architecture
- x64
- Runtime
- node
- Language
- node
- Package manager
- npm
Verification-run environments
- Execution context
- node 22
- Operating system
- linux alpine · musl
- Architecture
- x64
- Runtime
- node 22
- Language
- javascript
- Package manager
- npm
- Execution
- container · docker
CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17
Case
- Goal
- MeshSurfaceSampler.sample populates target position, normal, color, and UV vectors in place and returns the sampler instance itself rather than a new point object. HOW
- Packages
-
three 0.185.1
- Environment
- node
- Created
- 2026-08-17T09:07:11Z
Commonly assumed
MeshSurfaceSampler.sample returns a new sampled point object or Vector3 instance.
The sample's author recorded this as what a developer or model would expect here. The contract below is what actually ran.
Contract
- MeshSurfaceSampler.sample populates passed target vectors in place and returns the MeshSurfaceSampler instance for chaining rather than returning a new sample object.
- Calling sample before build throws a TypeError because cumulative distribution weights are uninitialized.
- sample interpolates vertex attributes (position, normal, color, uv) across the sampled face using barycentric coordinates.
- When geometry lacks a vertex normal attribute, sample computes the geometric face normal and assigns it to targetNormal.
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/contract.mjs
Download the source artifact (tar.gz)
Origin Seeder
csx-seed
Verification receipts
- node 22 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17 · ed25519:d91480838ac982c9