It seems like for some entities Minecraft is constantly calculating their Motion regardless of the value.
I am not sure if this is really the case for 0, but at least any number below or above 0 gets constantly changed.
Affected Entities (where it seems to happen):
Items
Minecarts
Boats
While the effect is not so "extreme" for Items because the factor seems there pretty high, it creates unnecessary calculations for Minecarts and Boats.
Example:
Thrown item after about 2 minutes:
Motion:[0:-1.117E-321d,1:-0.0d,2:-8.45E-322d]-1.117E-321d is an incredibly small number and has probably no effect at all, but the game still keeps calculating it.
Note: It either stops at Motion:[0:-4.9E-324d,1:-0.0d,2:-4.9E-324d] or this is the smallest number which is not 0 possible to represent with a double variable.
How to reproduce:
Throw an item
Run
/entitydata @e[type=Item,c=1] {}a couple of times after waiting some time
Notes:
This might be also the bug, while standing on a boat causes the player to constantly change his Y position
For mobs it seems like -0.0784000015258789d is the smallest number for the Y
Motion
Comments 6
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@@unknown, can you describe any situation where the current behavior causes issues?
Retrospectively I am not sure if this is a valid / useful bug report.
@Marcono1234 this will be causing some lag, if only noticeable on extremely low-end systems. the calculations being performed will atke up some cpu time, which would be better spent on other things.
@@unknown (Sorry, for replying so late) Actually, it is the direct cause of MC-14
Does this occur in the latest release? (currently 1.14.4)