CesiumGS/cesium

DeveloperError: Must define either _workerName or _workerPath for asynchronous geometry.

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#12,826 opened on Aug 21, 2025

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 (6 comments) (0 reactions) (0 assignees)JavaScript (3,324 forks)batch import
category - doccategory - polygons/geometrygood first issuetype - cleanup

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Description

What happened?

When i define a primitive use asynchronous: true like code below

        const primitive = new Cesium.Primitive({
            geometryInstances: instance,
            appearance: new Cesium.PerInstanceColorAppearance({
                flat: true,
                translucent: true,
                renderState: {
                    lineWidth: Math.min(2.0, viewer.scene.maximumAliasedLineWidth)
                }
            }),
            asynchronous: true,
            releaseGeometryInstances: true
        })

But browser report bug: DeveloperError: Must define either _workerName or _workerPath for asynchronous geometry. ssandcastle_url How or Where to define the _workerName or _workerPath var ?

Contributor guide

Research direction
Locate where workerName or workerPath is required in the Cesium source code for asynchronous geometry and provide the correct value or method to set them.
Tech stack
javascript
Domain
frontendcomputer graphics
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
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.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaScript
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75