playcanvas / playcanvas/engine

Particle System Screen Space and Local Space not rendered correctly

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#3,724 35 comments 0 reactions 0 assignees View on GitHub

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area: particles area: ui
Dominant language
JavaScript
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Description

If you choose Screen Space for the particle system and put it under a Screen Entity, the particles will stretch and behave differently than if it was outside the Screen Entity and not using Screen Space. Furthermore, Local Space doesn't work in combination with Screen Space. If I create a group under the Screen Entity, anchor said group to the bottom of the screen, and place the particle system under the group, the particle system won't be anchored to the bottom of the screen, for example.

TL;DR

  1. Particle System stretches and behaves differently under a Screen Entity and using Screen Space.
  2. Local Space not working in conjunction with Screen Space. I can't anchor the particle system anywhere on the screen.

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

No files, tests, or entry points are named in the issue. First reproduce both cases: a particle system using Screen Space under a Screen Entity, and a Local Space particle system under an anchored group; compare stretching, behavior, and anchoring, then add regression coverage showing both combinations work correctly.

Written by the indexing model from the issue text.

Assessment

Tech stack
javascript
Domain
game-dev
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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