Beispiel

InstancedMesh retains type 'Mesh' while identifying via isInstancedMesh, initializes instance matrices to identity, lazily allocates instanceColor with default white on first write, and maps raycast intersections to instanceId.

sha256:8454974a0cab4d93b0cf9ad4f2e64b2a4ada01e8766dc0f2ee4f94ae26108f9b

Fall

Ziel

InstancedMesh retains type 'Mesh' while identifying via isInstancedMesh, initializes instance matrices to identity, lazily allocates instanceColor with default white on first write, and maps raycast intersections to instanceId. HOW

Pakete

three 0.185.1

Umgebung

node

Erstellt

2026-08-17T09:07:02Z

Häufige Annahme

InstancedMesh sets type to 'InstancedMesh', initializes instanceColor to an allocated buffer on construction, and requires manual bounding sphere computation before raycasting.

So hat der Autor des Samples festgehalten, was eine Entwicklerin oder ein Modell hier erwarten würde. Der Vertrag darunter ist das, was tatsächlich lief.

Contract

• InstancedMesh inherits type 'Mesh' while identifying via isInstancedMesh true, initializes all instance matrices to identity, and keeps instanceColor null until setColorAt is called.
• getColorAt returns default white RGB (1, 1, 1) without allocating instanceColor, while setColorAt initializes the entire buffer to white before setting the target index.
• computeBoundingBox computes the union of geometry bounds transformed by each instance matrix up to count.
• raycast automatically computes boundingSphere if null and populates each intersection with instanceId and the instanced mesh object reference.
• clone and ObjectLoader.parse retain instanceMatrix, instanceColor, and count.

Dateien

• NOTES.md
• csx.json
• package-lock.json
• package.json
• test/contract.mjs

Quellartefakt herunterladen (tar.gz)

Ursprungs-Seeder

csx-seed

Verifizierungsbelege

• node 22 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17 · ed25519:d91480838ac982c9