playcanvas / playcanvas/engine
Particle System with scale in Transform not behaving correctly
Open
Nobody has claimed this yet.
area: graphics
- Dominant language
- JavaScript
- Stars
- 16.8k
- Forks
- 2k
- Avg merge
- 4h 32m
- Merged PRs (30d)
- 222
Description
Repro (how attached Editor scene was created)
- in Editor, create a default ParticleSystem in the scene - it renders white circles moving away from a point. Call it Particle System World
- Clone it to Particle System Local, and tick on 'Local Space on it'. Move it to different location. What you see are two visually equivalent systems on the screen.
- Apply Scale to Transform of both of these: 0.1, 0.1, 0.1 - and notice that the behavior of the Local one has changed a lot - see attached video, on right side. Left side is correct World space one.
here's the Editor project:
https://playcanvas.com/project/695668/overview/fx-test-local-vs-world
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Open the linked PlayCanvas Editor project and reproduce the comparison between World and Local Space particle systems after applying a 0.1 scale to their transforms. Compare the Local Space behavior with the World Space reference and use the attached video to identify the discrepancy; done means both systems remain visually equivalent after scaling.
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