CesiumGS / CesiumGS/cesium

Camera jumps when tracking entity in inertial reference frame

Open
#11,549 0 comments 0 reactions 0 assignees View on GitHub
category - camera category - entity type - bug
Dominant language
JavaScript
Stars
15.8k
Forks
3.9k
Avg merge
4d 6h
Merged PRs (30d)
34

Description

Reported on the forum: https://community.cesium.com/t/camera-direction-changes-when-tracking-the-entity/26915

> Hello, I am trying to load CZML data with CesiumJS and track it with a camera.
> However, I’ve noticed that the camera direction changes unexpectedly at times.
> This occurs between 47 and 48 seconds in the example below.

[Sandcastle](https://sandcastle.cesium.com/#c=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)

Contributor guide

Open the contributing guide

Research direction

Start with the linked Sandcastle reproduction and observe the camera while tracking the entity, especially between 47 and 48 seconds. Trace the CesiumJS camera-tracking behavior for inertial reference frames; done means the camera direction remains stable instead of changing unexpectedly.

Written by the indexing model from the issue text.

Assessment

Tech stack
javascript
Domain
frontend, web-dev
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.