In this context I mean the item the player has selected on their bar of 9 items at the bottom of their screen.

 

Normally to change the player's item I do something super basic like:

EntityPlayerSP p = Minecraft.getMinecraft().thePlayer;
p.inventory.currentItem = newCurrentItem;

 

Unfortunately recently this has only worked sometimes. When the player isn't moving at all, and I try to change the player's selected item, it doesn't work.

Basically during an onTick event, I'd use the above code to change it to 5 (as an example) and then next tick, it would be back at the previous value. And this happens every single tick.

 

Using a watchpoint on field modification I tracked down the culprit code reverting the value I set:

FMLEvents.playerTick(TickEvent$PlayerTickEvent) line: 99

ASMEventHandler_14_FMLEvents_playerTick_PlayerTickEvent.invoke(Event) line: not available

ASMEventHandler.invoke(Event) line: 55

EventBus.post(Event) line: 140

FMLCommonHandler.onPlayerPostTick(EntityPlayer) line: 355

EntityOtherPlayerMP(EntityPlayer).func_70071_h_() line:362

EntityOtherPlayerMP.func_70071_h_() line:52

...

 

The problem is none of the forge code I can find has a class called "FMLEvents" and I have no idea why a playerTick function would be modifying part of the player at all. Anyone know what's going on here?

Thanks a bunch, I traced it back to the Better PVP mod. The mod stores off the selected item pre-tick, and then restores it post-tick given some conditions. I can detect the mods presence and modify some of its public fields so this doesn't happen.