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How to iterate through my actual chunk?


HenryFoster

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I would like to find all sign-blocks and their position in the chunk at my player position. My problem is that I dont know how to iterate through the blocks in the chunk.

 

EntityPlayer player = Minecraft.getMinecraft().player;
World world = player.getEntityWorld();
Chunk chunk  = world.getChunkFromBlockCoords(player.getPosition());

Map<BlockPos, TileEntity> myMap = chunk.getTileEntityMap();
for(double x = 0; x <= 16; x++) {
		 System.out.println(chunk.getBlockState(new BlockPos(x+player.posX, player.posY , player.posZ)));  
}  

What I dont understand is how do I get the blocks of exactly the chunk where myPlayerPosition is. I can use loops with offsets but I dont understand how the coordinations work. because for "chunk.getBlockState() I need to set a blockposition but how do I get the position of the first/last block in that actual chunk?

 

I'm looking for something like :

for(double x = 0; x <= 16; x++) {
		 System.out.println(chunk.getBlockState(new BlockPos(x+offset,blablabla)));  
}  

I know its only one dimensional but I want to get it right first before I go on for the other axis. I need to understand how I can turn this relative chunk coordinations into real worldcoordination.

 

I already found this but the topic is more about blockproperties then the iterating.

 

Edited by HenryFoster
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Edit:

 

I got it:

 

@SubscribeEvent
	public void onKeyInput(InputEvent.KeyInputEvent event) 
	{
	  if(KeyBindings.myKey.isPressed())
	  {
		   System.out.println("KEY K");
	   
		   EntityPlayer player = Minecraft.getMinecraft().player;
		   World world = player.getEntityWorld();
		   Chunk chunk  = world.getChunkFromBlockCoords(player.getPosition());
	
		   int a = chunk.x*16;
		   int b = chunk.z*16;
		   System.out.println("Chunk starts at: "+ a*16 + " " + b*16);
		   for(double x = 0; x <= 15; x++) 
		   {  
			   for(double y = player.posY-2; y <= player.posY+10; y++)
			   {
				   for(double z = 0; z <= 15; z++)
				   {
					   //System.out.println(chunk.getBlockState(new BlockPos(a+x,player.posY , b+z)));  
					   BlockPos actualPosition = new BlockPos(a+x,y, b+z);
					   IBlockState state = chunk.getBlockState(actualPosition);
					   if(state.getBlock() instanceof BlockSign) 
					   {
						   for(ITextComponent i: ((TileEntitySign)world.getTileEntity(actualPosition)).signText) 
						   {
							   System.out.println(i.getUnformattedComponentText());
						   }
					   }
				   }
			   }
			   
				   
		   }
		   
	  	}
	}

I use the Chunk coordiantes a and b (yes I know bad names I will change them) and multiply them with 16 to get the start coordinates of the chunk where my player is. Later I define the position of the block "I'm looking at" with the starting position of the chunk + x/z to get the global-coordinates of that block.

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20 hours ago, HenryFoster said:

multiply them

Don’t multiply, use bit shifting. The results are different (integer multiplication rounds down)

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Multiplying works out the same. Its dividing that causes problems.

(You should still bitshift)

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Theres also a performance gain with bitshifting

  • Like 1

About Me

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My Discord - Cadiboo#8887

My WebsiteCadiboo.github.io

My ModsCadiboo.github.io/projects

My TutorialsCadiboo.github.io/tutorials

Versions below 1.14.4 are no longer supported on this forum. Use the latest version to receive support.

When asking support remember to include all relevant log files (logs are found in .minecraft/logs/), code if applicable and screenshots if possible.

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