Getting EntityPlayer in a TickEvent to call another method.

[Geometrically]

I want to call a method that has a parameter, EntityPlayer player to a TickEvent. I did this with null, and I get a NullPointerExeption. How do I get the entity player there and put it there? My code is attached.

package com.geometrically.SolarApoc.util;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.util.text.TextComponentString;
import net.minecraft.util.text.TextFormatting;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
import net.minecraftforge.fml.common.gameevent.TickEvent.WorldTickEvent;


public class WorldTickHandler {
	
	public static int ticker;
	@SubscribeEvent
	public void onWorldTick(WorldTickEvent handler){
		ticker++;
		
		//Tick Checkers
		if (ticker > SAConfiguration.dayoneStart){
			SAMethods.beginDayOne();
			System.out.println("Day One has started");
		}
		if (ticker > SAConfiguration.daytwoStart){
			SAMethods.beginDayTwo();
		}
		if (ticker > SAConfiguration.daythreeStart){
			SAMethods.beginDayThree();
		}
		if (ticker > SAConfiguration.dayfourStart){
			SAMethods.beginDayFour();
		}
		if (ticker > SAConfiguration.dayfiveStart){
			SAMethods.beginDayFive();
		}
		
		printMessages(null);
		
	}
	
	public void printMessages(EntityPlayer player){

		//Message Printers
		if (ticker == SAConfiguration.dayoneStart){
			SAMethods.beginDayOne();
			
			player.addChatComponentMessage(new TextComponentString(TextFormatting.RED + "The Solar Apocalypse has started. Day One will now upbring its wrath."));
			System.out.println("!!!!!!!!!!!!!!!!!!!!Day One has started");
		}
		if (ticker == SAConfiguration.daytwoStart){
			SAMethods.beginDayTwo();
			
			
			player.addChatComponentMessage(new TextComponentString(TextFormatting.RED + "The Solar Apocalypse's second wave has arrived. Day Two will now upbring its wrath."));
		}
		if (ticker == SAConfiguration.daythreeStart){
			SAMethods.beginDayThree();
			
			player.addChatComponentMessage(new TextComponentString(TextFormatting.RED + "The Solar Apocalypse's third wave has arrived. Day Three will now upbring its wrath."));
		}
		if (ticker == SAConfiguration.dayfourStart){
			SAMethods.beginDayFour();
			
			player.addChatComponentMessage(new TextComponentString(TextFormatting.RED + "The Solar Apocalypse's fourth wave has arrived. Day Four will now upbring its wrath."));
		}
		if (ticker == SAConfiguration.dayfiveStart){
			SAMethods.beginDayFive();
			
			player.addChatComponentMessage(new TextComponentString(TextFormatting.RED + "The Solar Apocalypse's fifth and final wave has arrived. Let's see how long you can survive. "));
			player.addChatComponentMessage(new TextComponentString(TextFormatting.GOLD + "Escape if you can."));
		}
	}
}

 

[Geometrically]

So what do I put to get the player? 

[Draco18s]

Which player?

[Geometrically]

	
		printMessages(null);
		
	}
	
	public void printMessages(EntityPlayer player){

That little snippit of code. Look at the first post.

[Choonster]

Draco isn't asking where you want to use the player, he's asking which player you're actually trying to use. If there are 20 players on a server, which one do you want to call the method for?

[ctbe]

Geometrically, I posted an answer in what appears to be an accidental duplicate of this thread. Here

To add more information to it, the handler variable in your method has the information you want and you get in the form of a List<EntityPlayer> through the world. From what I understand, you want to broadcast the message to all players, so you would iterate through the list like this

 

World worldIn = handler.world;
List<EntityPlayer> playerList = worldIn.playerEntities;

for (EntityPlayer player : playerList) {
  printMessages(player);
}

 

I find it odd that the code I posted in the other thread has EntityPlayers. With an 's' at the end. It is supposed to be EntityPlayer. Just to clarify.

 

I hope it helps.

Edited April 13, 2017 by ctbe
Typo

[Geometrically]

  On 4/13/2017 at 4:17 AM, Choonster said:

Draco isn't asking where you want to use the player, he's asking which player you're actually trying to use. If there are 20 players on a server, which one do you want to call the method for?

Expand  

I'm trying to use all of them. The method called prints out messages to the whole world

[Choonster]

  On 4/14/2017 at 3:37 AM, Geometrically said:

I'm trying to use all of them. The method called prints out messages to the whole world

Expand  

 

Then you need to get the players from the World, as ctbe demonstrated.

 

It's not directly related to your problem, but it should be noted that WorldTickEvent fires twice per tick per loaded dimension, so ticker will be incremented at least twice per tick with your current code. You need to check the event's Phase and the dimension being ticked to avoid this.

 

You should avoid storing things related to game state in your event handler classes as these are shared between both logical sides (so you could potentially be accessing the fields from two threads at once) and aren't persisted in any way (so the data won't be saved when the client/server is stopped). Use data storage methods like World Saved Data or Capabilities to safely store per-dimension or per-map data that will be persisted with the save.

 

You also need to consider which dimensions are affected by this "Solar Apocalypse", is it all dimensions or only the Overworld? Does each dimension have its own timer, or do they all use the same timer?

[Geometrically]

  On 4/14/2017 at 7:38 AM, Choonster said:

 

Then you need to get the players from the World, as ctbe demonstrated.

 

It's not directly related to your problem, but it should be noted that WorldTickEvent fires twice per tick per loaded dimension, so ticker will be incremented at least twice per tick with your current code. You need to check the event's Phase and the dimension being ticked to avoid this. So The World Tick Event is called every 1/2 a tick?

 

You should avoid storing things related to game state in your event handler classes as these are shared between both logical sides (so you could potentially be accessing the fields from two threads at once) and aren't persisted in any way (so the data won't be saved when the client/server is stopped). Use data storage methods like World Saved Data or Capabilities to safely store per-dimension or per-map data that will be persisted with the save. I'll try this.

 

You also need to consider which dimensions are affected by this "Solar Apocalypse", is it all dimensions or only the Overworld? Does each dimension have its own timer, or do they all use the same timer? It's only in the overworld

Expand  

My answers are in bold.

[Draco18s]

  On 4/17/2017 at 3:26 AM, Geometrically said:

So The World Tick Event is called every 1/2 a tick?

Expand  

No.  It's called twice per tick. Once before any vanilla logic occurs and once after.

Phase.Start effectively happens absolfreakinglutelyimmediately after Phase.End as far as game-time is concerned, just not computation-wise as there are multiple dimensions to process.

[Geometrically]

So I have 2 variables, and increment a for loop where every two ticker1++'s ticker2++

[Jay Avery]

No, you just need to check the event's phase before doing your own code - pick either Phase.START or Phase.END (often it doesn't matter which), and compare it to event#phase.