Setting relative position of Physics components on Android Breaks. W/ Video

KRushin · May 12, 2014, 5:14pm

How to reproduce:

1.Create actor blueprint… create a simple invisible box.

Make the box a parent of a static Mesh. !Important: Enable physics on the static mesh
Then play the game… the mesh will move with physics like expected…fall/roll down a hill just fine on android/desktop
When you reset the relative position, the static meshes gets deleted/disappear

On desktop it performs as expected. On mobile the actor/components completely disappear.
Here is a video of it working PROPERLY on desktop (sorry i couldnt get mobile footage but its easy to reproduce). As you can see when i reset the relative postion it goes back to 0,0,0 and falls again. If you try this on mobile they disapear. Phantom mesh

https://www…com/watch?v=mLkgAeAf5dc&feature=youtu.be

KRushin · May 13, 2014, 2:57pm

Bump for confirmation atleast?

KRushin · May 14, 2014, 7:49pm

bump to confirm

KRushin · May 15, 2014, 4:56pm

please get a confirmation. Really need a better bug reporting system

anonymous_user_b9532c9a · May 15, 2014, 7:38pm

Hi ,

I have been unable to reproduce this effect thus far. In your video you show that your blueprints are in a custom event, what calls the custom event? If I can produce the exact setup you have it may help to diagnose what is going on. Thank you!

KRushin · May 15, 2014, 9:37pm

Here is a video of both desktop vs. mobile so u can see what is happening to both. Sorry for totally crappy technical definition. Still getting used to UE4 terms.

right now now Input → evoking event (no particular reason why i used a custom event atm)

https://www…com/watch?v=gqQzRQE5_8c&feature=youtu.be

anonymous_user_b9532c9a · May 16, 2014, 1:12pm

Hi ,

Unfortunately, the Galaxy S3 is not currently one of our supported Android devices. The closest we have tested is the Galaxy S4, so there may be some compatibility issues. Have you reproduced this on any other mobile devices?

KRushin · May 16, 2014, 2:45pm

Its a Galaxy Note 3 on 4.4.2, So its losely based off of the S4 (same year and only slight hardware revisions). Android support needs some major serious stability/compatibility love.

I do have other android devices but UE4 doesn’t even launch on those…

Nexus 10 (I’ll file a report later) on 4.4.2

and Galaxy S1 (Too old i wouldnt expect it to run)

KRushin · May 19, 2014, 7:20pm

I believe its a bug because its a behavior, not stability, crashing, missing feature, performance. ETC.

I was able to reproduce it on my nexus 10 (now that has compatibility issues, Mobile HDR causing crashes -_- crazy silly lighting artifacts http://i.imgur.com/aKPH2U7.jpg http://i.imgur.com/XzW19vi.jpg) But i know those things will come with time.

But i was able to get it to run on the nexus 10 and it exhibited the same behavior as my Note 3.

I ran into the similar problems with Relative location of a child object (which has physics simulations on). Seperate feature but problems with relative location handling

I posted a super stripped down version on the . https://.unrealengine.com/showthread.php?6366-If-you-have-a-free-minute-try-this-project-on-your-android-device-Bug-Check

I simplified it a bit aswell.

anonymous_user_bcdd396d · October 3, 2014, 3:42pm

Hello,

Thank you for your report. We were not able to investigate this on the engine version you reported, but there have been many version changes to UE4 since this question was first posted. With a new version of the Engine comes new fixes and it is possible that this issue has changed or may no longer occur. Due to timetable of when this issue was first posted, we are marking this post as resolved for tracking purposes.

If you are still experiencing the issue you reported in the current engine version, then please respond to this message with additional information and we will investigate as soon as possible. If you are experiencing a similar, but different issue at this time, please submit a new report for it.

Thank you.