CesiumGS/cesium

Voxel Spec data uses legacy 3D Tiles 1.1 representation

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#12,596 opened on Apr 30, 2025

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JTCcategory - voxelsgood first issuetype - bug

Description

The spec data for the Voxels uses subtree files with contentAvailability. The latest version of the specs, this should actually be an array.

(The fix should be trivial, and CesiumJS supports the legacy version, so this is not criticial, but this issue is rather intended as a note (maybe for myself) to fix this when there's a bit more time)

Contributor guide

Tech stack
javascript
Domain
data
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
1
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
JSON3D Tiles 1.1 spec
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
90
Research direction
The issue is to update the subtree JSON files under Specs/Data/Cesium3DTiles/Voxel/ (e.g., VoxelCylinder3DTiles/subtrees/0/0/0/0.json) so that the 'contentAvailability' field is an array instead of a non array value. All similar legacy representations should be identified and fixed. Look at the linked commit for reference and ensure alignment with the latest 3D Tiles 1.1 spec.
Voxel Spec data uses legacy 3D Tiles 1.1 representation · CesiumGS/cesium#12596 | Good First Issue