twice Comman Issue Unit.Train in command center about jbwapi

[lavinoys]

@dgant @Bytekeeper
thanks. i solved
code

[dgant]

The most likely reason that this would happen is issuing a train command on consecutive frames. I took a quick peek at your code:

if (commandCenter.type == UnitType.Terran_Command_Center
            && commandCenter.canTrain()
            && commandCenter.trainingQueue.size <= 0
            && self.minerals() >= 50
        ) {
            commandCenter.train(UnitType.Terran_SCV)
        }

This can cause the command center to queue SCVs even when you don't expect it. The reason is because of latency.

Suppose you're running your bot in single player, which has 2 frames of latency. That means that when you tell your bot to train an SCV, the game does not follow the command until 2 frames later:

• Frame 100: trainingQueue.size ==0 so you tell Command Center to train an SCV
• Frame 101: trainingQueue.size ==0 so you tell Command Center to train an SCV
• Frame 102: The Command Center starts training an SCV. trainingQueue.size == 1
• Frame 103: The Command Center starts training an SCV. trainingQueue.size == 2

Here are two ways to avoid this situation:

1. Enable latency compensation. This causes (J)BWAPI to present a fictional game state that looks like the game would if there were no latency
2. Don't issue commands to units you've commanded too recently, perhaps by using unit.getLastCommandFrame()

But if you've encountered an issue not described here, please let us know how to reproduce it.

[lavinoys]

@dgant
Hello. Thank you for your reply. I read your reply carefully.

1. reply

• how can i settings "latency frames = 6, turn size = 2", Do I have to modify it within the code?
  Or do I have to modify it within BWAPI?

2. reply
   If you use this command, you cannot request the following command

[lavinoys]

My English is not good enough.
Thank you for your understanding.

[lavinoys]

I solved it this way. Is this right?
this code

if (isTwiceReq) { isTwiceReq = false return } else { isTwiceReq = true }

[Bytekeeper]

@lavinoys You could join our SSCAIT Discord. You will find a link at the bottom of the "readme" of jbwapi here, in the documentation section. A lot of bot authors are hanging around there and might be able to help. (Ok most likely @dgant will answer there as well :) )