mapbox / mapbox/mapbox-maps-ios
View annotations disappear with some camera states
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- Dominant language
- Swift
- Stars
- 601
- Forks
- 196
- PR merge metrics
- No merged PRs in 30d
Description
## Environment
- Xcode version: 15.3
- iOS version: 17.4
- Devices affected: iPhone 15 Pro
- Maps SDK Version: 11.2.0
## Observed behavior and steps to reproduce
In our app we show map pins as view annotations because we want to animate our pins. In tilted map view (pitch > 0) there seems to be bug that with some map rotations view annotations get hidden.
https://github.com/mapbox/mapbox-maps-ios/assets/2304597/5bfd825e-1e81-4fa5-84cf-63cb597a47c2
## Expected behavior
View annotations should be visible when they are in the camera frustum.
## Notes / preliminary analysis
As I understand view annotations are not drawn when they are offscreen. Maybe problem is that camera transformation doesn't correctly project visible area.
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
Start by reproducing the issue on an iPhone 15 Pro with Xcode 15.3, iOS 17.4, and Maps SDK 11.2.0 using a pitched map and varying camera rotations. Investigate view-annotation offscreen checks and camera-frustum projection; done means annotations remain visible whenever they are inside the camera frustum.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- ios, swift
- Domain
- mobile
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 38/100