[1.12] Modify the 'player list'

[Toinou9120]

Hello,

I'm making a client-sided mod where I need to write some infos about a player in the player list, like the level of the player ect.

But I don't know how to modify the content of the player list. I looked in the RenderGameOverlayEvent class and thought about reflection but I don't know what I should get and modify in this class. Can someone help me ? 

[Toinou9120]

Thank for your answer.

When I meant level, I didn't mean xp level, I mean a server minigame level, that I get from a statistics website.

When you say "draw", are you talking about the draw fonction in OpenGL ?

And another question, I need to draw the level of the player after his name in the player liste, so how do I get the actual content of the player list to know where to draw the level of the player ?

[Toinou9120]

Does someone have an idea ? 

[Toinou9120]

Thank for your really complete answer,

I'm not a native english speaker so I have some difficulties to understand the step.

What i have understand is that :

 

- I must create a class that extends GuiPlayerTabOverlay and override the getPlayerName method so I can modify what it return

- Then I should get an instance of the GuiIngame

 

But after, I can't grab the overlayPlayerList beacause it's protected, so I don't understand how to do this. Can you explain ?

I'm sorry if it's simple and I just have a lack of vocabulary to understand what you said.

Edited October 11, 2017 by Toinou9120
mistake

[Toinou9120]

So I tried to do this, but it does not work. I think there are errors in my code.

 

This is my TabOverlay class :

 

public class TabOverlay extends GuiPlayerTabOverlay {

	public TabOverlay(Minecraft mcIn, GuiIngame guiIngameIn) {
		super(mcIn, guiIngameIn);
	}
	
	GuiPlayerTabOverlay gui;
	
	 /**
     * Returns the name that should be renderd for the player supplied
     */
	@Override
    public String getPlayerName(NetworkPlayerInfo networkPlayerInfoIn)
    {	
		return gui.getPlayerName(networkPlayerInfoIn) + "a";
    }
}

 

And this is my EventHandler class where I handle the TickEvent :

 

@SubscribeEvent
public void onTickEvent(TickEvent.ClientTickEvent e) {
    	
    if(e.phase == Phase.START) {
    		
    	TabOverlay tab = new TabOverlay(Minecraft.getMinecraft(), Minecraft.getMinecraft().ingameGUI);
    		
    	try {
				
    		Field overlay = GuiIngame.class.getDeclaredField("overlayPlayerList");
			overlay.setAccessible(true);
			overlay.set(Minecraft.getMinecraft().ingameGUI, tab);
				
				
		} catch (NoSuchFieldException | SecurityException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		} catch (IllegalArgumentException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		} catch (IllegalAccessException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}
    }	
}

 

There is a layout problem with the code integration, but I don't know why.

I rarely use reflection so maybe I don't use it correctly or maybe this is the TabOverlay class that is false.

Can you help me ?

Edited October 13, 2017 by Toinou9120
Mistakes

[Draco18s]

Use the ReflectionHelper class instead of doing it yourself. When built and released, the field will not be called "overlayPlayerList" but something like field_89034_b

[Toinou9120]

So I used the ReflectionHelper class, so this is my new EventHandler class :

@SubscribeEvent
	public void onTickEvent(TickEvent.ClientTickEvent e) {
    	
    	if(e.phase == Phase.START) {
    		
    		TabOverlay tab = new TabOverlay(Minecraft.getMinecraft(), Minecraft.getMinecraft().ingameGUI);
    		
    		try {
				
    			ReflectionHelper ref = new ReflectionHelper();
    			
    			ref.setPrivateValue(GuiIngame.class, Minecraft.getMinecraft().ingameGUI, tab, "field_175196_v");
				
				
			} catch (SecurityException e1) {
				// TODO Auto-generated catch block
				e1.printStackTrace();
			} catch (IllegalArgumentException e1) {
				// TODO Auto-generated catch block
				e1.printStackTrace();
			}
    	}	
    }

 

But it throws a NoSuchFieldException, this is the crash report :

 

net.minecraftforge.fml.relauncher.ReflectionHelper$UnableToAccessFieldException: net.minecraftforge.fml.relauncher.ReflectionHelper$UnableToFindFieldException: java.lang.NoSuchFieldException: field_175196_v
	at net.minecraftforge.fml.relauncher.ReflectionHelper.setPrivateValue(ReflectionHelper.java:170)
	at com.example.examplemod.Event.onTickEvent(Event.java:32)
	at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_9_Event_onTickEvent_ClientTickEvent.invoke(.dynamic)
	at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
	at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:179)
	at net.minecraftforge.fml.common.FMLCommonHandler.onPreClientTick(FMLCommonHandler.java:342)
	at net.minecraft.client.Minecraft.runTick(Minecraft.java:1815)
	at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1171)
	at net.minecraft.client.Minecraft.run(Minecraft.java:436)
	at net.minecraft.client.main.Main.main(Main.java:118)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97)
	at GradleStart.main(GradleStart.java:26)
Caused by: net.minecraftforge.fml.relauncher.ReflectionHelper$UnableToFindFieldException: java.lang.NoSuchFieldException: field_175196_v
	at net.minecraftforge.fml.relauncher.ReflectionHelper.findField(ReflectionHelper.java:117)
	at net.minecraftforge.fml.relauncher.ReflectionHelper.setPrivateValue(ReflectionHelper.java:166)
	... 21 more
Caused by: java.lang.NoSuchFieldException: field_175196_v
	at java.lang.Class.getDeclaredField(Unknown Source)
	at net.minecraftforge.fml.relauncher.ReflectionHelper.findField(ReflectionHelper.java:108)
	... 22 more

Do you know what is the issue ?

[Draco18s]

java.lang.NoSuchFieldException: field_175196_v

You need to pass in both names.