https://github.com/johannesdeml/unity-ios-touch-input-stuttering

Bug report for frame jumps and frame freezes on ios with simple touch input
https://github.com/johannesdeml/unity-ios-touch-input-stuttering

bugreport unity

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Bug report for frame jumps and frame freezes on ios with simple touch input

• Host: GitHub
• URL: https://github.com/johannesdeml/unity-ios-touch-input-stuttering
• Owner: JohannesDeml
• License: mit
• Created: 2017-03-29T17:30:32.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2017-03-30T16:44:02.000Z (over 9 years ago)
• Last Synced: 2025-02-13T22:45:36.651Z (over 1 year ago)
• Topics: bugreport, unity
• Language: C#
• Size: 415 KB
• Stars: 1
• Watchers: 3
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# iOS touch input stuttering

Noticable frame jumps and frame freezes on ios with simple touch input

* [Recordings 240 FPS](https://youtu.be/O4JOB5Gsa6I)

* [Introduction Video](https://youtu.be/2lu996QHSpE)

* [Raw video data](https://drive.google.com/drive/folders/0ByTO3RP9DQI0bjl5WklWbVJrZkU?usp=sharing)

## Project information

### Problem

* Triggering the event system with touches on a dummy button creates frame problems

* The frame problems are either Frame freezes or frame Jumps

* boh of them are quite subtle, but noticable once you're trained to see them

* Frame Jumps (leaving out one frame) seems to be more common than frame freezes (in Unity 5.6 at least)

* Most significant problems on iPad Pro

* On GLES3 the problem seems to be less frequent than on Metal

### Test Scenario

* Unity 5.6.0f2

* XCode 8.3 (8E162)

* OpenGLES2, OpenGLES3 and Metal graphics API

* il2CPP

* Gamma color space

![Screenshot v0.2](https://i.imgur.com/f50pAdR.png)

### Results (v0.2)

Lost frames - (Without Tapping / With Tapping)

|                | Metal+Xcode      | Metal           |

|----------------|------------------|-----------------|

| iPad Pro       | (0.472 / 6.850)  | (1.519 / 3.997) |

| iPhone SE      | (0.223 / 0.8135) | (0.234 / 0.800) |

| iPhone 6s Plus | (0.403 / 1.943)  | (0.465 / 1.053) |

### Additional Tests

* Tested with Unity 5.5.1p1

* Tested with XCode 8.2.1, 8.3 beta 2

## How to reproduce?

* Clone the project

* set Build Target to iOS and release, disable development build

* Build & Run Project

* Install the app

* Detach the device from the computer

* Run once without hitting the **Tap!** button

* Run once with hitting the **Tap!** approximately twice a second

* Calculate the difference between the two outcomes