CesiumGS / CesiumGS/cesium

billboard with eyeoffest weird image behavior/

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#11,397 3 comments 0 reactions 0 assignees View on GitHub
category - 2d / columbus view category - billboards type - bug
Dominant language
JavaScript
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Description

Hello.

when I am using eyeoffset I get this weird behavior,
of what is seems that the billboard gets duplicated.

![image](https://github.com/CesiumGS/cesium/assets/86636988/485268dc-e909-4adf-975f-763ddde9826c)

also something I wasn't able to recreate here is disappearance of the billboard when,
placing negative value in the z parameter in the eyeoffset but when i pass positive its,
either duplicates or spins around the original position .

in the sandcastle bothe negative and positive doing the same effect off spin around or duplicating.

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

Contributor guide

Open the contributing guide

Research direction

Start by running the linked Sandcastle reproduction and inspect the billboard eyeOffset behavior for positive and negative z values. Compare the result with the expected single, stable billboard; done means the billboard no longer duplicates, spins, or disappears when eyeOffset is changed.

Written by the indexing model from the issue text.

Assessment

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

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