Hello there,

So while I was trying to make my mod I encountered a simple yet pretty difficult problem. How do you get a block (server side perhaps?) from a blockPosition? The particular problem i'm having is getting a World class which then allows you to get a block. Here are the pieces of code I need to use this for:

package net.hasanchik.neutroneum.util;

import net.minecraft.core.BlockPos;
import net.minecraft.world.level.block.Block;
import org.jetbrains.annotations.NotNull;
import net.minecraft.world.level.;

public class BasicUtils {
    public static class BlockUtils {
        public static BlockPos divideBlockPos(@NotNull BlockPos position, int divisor) {
            return new BlockPos(position.getX()/divisor, position.getY()/divisor, position.getZ()/divisor);
        }
        public static Block[] getAllBlocksInRectangle(BlockPos position, BlockPos size, @NotNull Boolean centered) {
            BlockPos startingPosition = position;
            if (centered) {
                startingPosition.subtract(divideBlockPos(size, 2));
            }
            for (int x = position.getX(); x <= size.getX(); x++) {
                for (int y = position.getY(); y <= size.getY(); y++) {
                    for (int z = position.getZ(); z <= size.getZ(); z++) {
                        World.world.getBlockState(new BlockPos(x, y, z)).getBlock();
                    }
                }
            }
        }
        public static Block getAllBlocksInBox() {

        }
    }
}

package net.hasanchik.neutroneum.item.custom;

import net.hasanchik.neutroneum.util.BasicUtils;
import net.minecraft.core.BlockPos;
import net.minecraft.network.chat.Component;
import net.minecraft.util.RandomSource;
import net.minecraft.world.InteractionHand;
import net.minecraft.world.InteractionResultHolder;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.item.Item;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.block.Block;

import java.util.HashMap;

public class MetalDetectorItem extends Item {
    //TODO: find better way of storing detectable blocks
    public static final int animationFrames = 31;
    protected static HashMap<String, String> detectableBlocks = new HashMap<>();
    protected Integer closestOreDistance = 0;
    protected int

    public MetalDetectorItem(Properties properties) {
        super(properties);
    }

    private void print(String message, Player player) {
        player.sendSystemMessage(Component.literal(message));
    }
    public InteractionResultHolder<ItemStack> use(Level level, Player player, InteractionHand hand) {
        if(!level.isClientSide() && hand == InteractionHand.MAIN_HAND) {
            BlockPos playerBlockPos = BlockPos.containing(player.getPosition(1));
            BlockPos[] blocks = BasicUtils.BlockUtils.getAllBlocksInRectangle();

            this.closestOreDistance = RandomSource.createNewThreadLocalInstance().nextInt(animationFrames);
            print("test " + this.getClosestOreDistance(), player);
        }

        return  super.use(level, player, hand);
    }

    public int getClosestOreDistance() {
        System.out.println(this.closestOreDistance);
        return this.closestOreDistance;
    }
}

Please keep in mind that the code isn't finished yet

Edited April 9, 20232 yr by hasanchik

Level.getBlockState(BlockPos)

You should also first check Level.isLoaded(BlockPos) to avoid unnecessary loading of chunks  - or crashing if you try to do that on that client.

 

If you don't have access to a Level, (either directly or from a player/entity) then you are probably doing something wrong.