Hi! I’m experimenting with 3D games in Defold (so far, I’ve only used Defold for 2D games). I’m currently using version 1.12.3.
I started by tinkering with the “3D third-person game sample.” I wanted to change the rocks to use dynamic collisions instead of static ones. After changing the type and collision masks, some strange things started to happen - the rocks began falling through the ground plane (or other objects) and a message appeared in the console:
WARNING:PHYSICS: Overflow in AABB, object removed from simulation
WARNING:PHYSICS: If you can reproduce this, please email bugs@continuousphysics.com
WARNING:PHYSICS: Please include above information, your Platform, version of OS.
WARNING:PHYSICS: Thanks.
I started looking for intersecting objects etc. but found nothing. Somehow I found out, that the problem is collision shape position offset:
After changing its position to (0,0,0) rocks behave correctly:
I couldn’t find any recommendation stating that a collision shape should not be moved away from (0,0,0). In fact, the ability to control its position suggests that this should work without issues.
I was about to report this as a bug, but I checked another version of Defold (1.12.2), and everything behaved exactly the same. So I decided not to report it - perhaps collision shapes simply need to stay at (0,0,0). However, when I tried using a “capsule” shape with barrels (and later with rocks), things became completely unstable - objects started flying around at extreme speeds.
So, in summary:
- I cannot place “sphere” or “box” collision shapes at positions other than (0,0,0) without breaking collisions.
- I cannot use the “capsule” collision shape because everything goes out of control—even with very small capsules, objects bounce at extremely high speeds.
I don’t think the engine itself is this broken, so something must be wrong in my project. Could someone take a look and suggest what I might be doing wrong?
(well, maybe a bit off-topic, but I tried to upload 33.7 MB zip file with whole modified project here and got info that file is too big, however it says that maximum size is 48.8 MB):
I uploaded the file then: Download CookingGame.zip | LimeWire