the same bug was causing the weird thing here:
1: if you launch the program with refresh = true, the wall will mostly fall over, in contrast to if you launch the program with refresh = false, then press space to make refresh = true, the wall has no problems.
as said before, caused by the low FPS at launch
1: if you launch the program with refresh = true, the wall will mostly fall over, in contrast to if you launch the program with refresh = false, then press space to make refresh = true, the wall has no problems.
as said before, caused by the low FPS at launch