`["distance-from-center"]` calculation is broken with non-mercator projections
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- TypeScript
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Description
**mapbox-gl-js version**: v2.6.0-beta.2
**browser**: Any
### Steps to Trigger Behavior
1. Use `http://localhost:9966/debug/dynamic-filter.html`
2. Use the mouse tooltip to look at `distance-from-center` values
3. At high zooms when the map is undistorted to `mercator`, the calculations are still inaccurate.
### Expected Behavior
Value is 0 near the center, >0 above and <0 below, independent of zoom
https://user-images.githubusercontent.com/1449257/140559433-42bad370-8d40-492c-826f-1642edba74d8.mov
### Actual Behavior
Values are wildly large
https://user-images.githubusercontent.com/1449257/140559476-dd7c4334-0c04-42dc-9c76-44140fd8e0c7.mov
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
Run debug/dynamic-filter.html and use the mouse tooltip to reproduce the distance-from-center values at high zoom with a non-Mercator projection. Trace the calculation from this debug entry point, then verify that values are near 0 at the center, positive above, negative below, and independent of zoom.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- typescript
- Domain
- frontend, web-dev
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 38/100