1.20.1 Level.setBlock doesn't work on client

[_p1nero]

I created a item when you click on block it will generate a skyisland. But it just generate one dirt on where I click. I'm sure it generated because there is an invisible barrel in which the dirt should be. And when I restart the game, the invisible dirt appear.

level.setBlockAndUpdate() is the same.

 

Item.java

package net.p1nero.skyislandbuilder.item;

import net.minecraft.world.InteractionHand;
import net.minecraft.world.InteractionResult;
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.item.context.UseOnContext;
import net.minecraft.world.level.Level;
import net.p1nero.skyislandbuilder.utils.SkyIslandGenerator;


public class PerlinSkyIslandBuilderItem extends Item {

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

    @Override
    public InteractionResultHolder<ItemStack> use(Level p_41432_, Player p_41433_, InteractionHand p_41434_) {
        //TODO: Open setting window
        return super.use(p_41432_, p_41433_, p_41434_);
    }

    @Override
    public InteractionResult useOn(UseOnContext context) {
        SkyIslandGenerator skyIslandGenerator = new SkyIslandGenerator(context.getClickedPos(),context.getLevel());
        skyIslandGenerator.printSkyIsland();
        return super.useOn(context);
    }
}

 

SkyIslandGenerator.java

public void printSkyIsland() {
        double[][] skyIsland = generateSkyIsland(width, height, scale, octaves, persistence, lacunarity, seed, maxHeight*10);
        int maxHeight = -1;
        int max_x = 0, max_z = 0;
        for (int x = 0; x < width; x++) {
            for (int z = 0; z < height; z++) {
                if (skyIsland[x][z] > maxHeight) {
                    maxHeight = (int)skyIsland[x][z];
                    max_x = x;
                    max_z = z;
                }
                System.out.print("("+x+','+z+"):"+(int)skyIsland[x][z]+" ");
            }
            System.out.println();
        }

        for (int x = 0; x < width; x++) {
            for (int z = 0; z < height; z++) {
                for(int y = bottom.getY()+maxHeight ; y>bottom.getY()+maxHeight-skyIsland[x][z] ; y--){
                   level.setBlock(new BlockPos(bottom.getX()+x-max_x,y,bottom.getZ()+z-max_z), Blocks.DIRT.defaultBlockState(),3);
                }
            }
        }
    }

 

Edited January 13, 2024 by _p1nero

[MFMods]

you did it on client only. all changes need to happen on the server. client only actions can be particles, toasts, etc.

in useOn(), first check the side - if not client then printBlocks. outside of the check, return proper value (see below).

do not call super.useOn - let's say you right-clicked a lever. you do not want to generate your island in front of the lever and then flip it as a bonus. have one or the other. you may want to support both via crouching check but i wouldn't. return InteractionResult.sidedSuccess(level_is_client). that will give you a hand animation on client.

if you're in a good mood, don't make a hundred BlockPos objects. make one BlockPos.Mutable, call set to move it around before use.

Edited January 14, 2024 by MFMods

[_p1nero]

1 hour ago, MFMods said:

you did it on client only. all changes need to happen on the server. client only actions can be particles, toasts, etc.

in useOn(), first check the side - if not client then printBlocks. outside of the check, return proper value (see below).

do not call super.useOn - let's say you right-clicked a lever. you do not want to generate your island in front of the lever and then flip it as a bonus. have one or the other. you may want to support both via crouching check but i wouldn't. return InteractionResult.sidedSuccess(level_is_client). that will give you a hand animation on client.

if you're in a good mood, don't make a hundred BlockPos objects. make one BlockPos.Mutable, call set to move it around before use.

Thanks bro, I add the check side code and now when I right click it just give me a hand animation and generate nothing,  even an invisible barrier...
 

    @Override
    public InteractionResult useOn(UseOnContext context) {
        Level level = context.getLevel();
        if(!level.isClientSide){
            SkyIslandGenerator skyIslandGenerator = new SkyIslandGenerator();
            skyIslandGenerator.printSkyIsland(context.getClickedPos(),context.getLevel());
        }
        return InteractionResult.sidedSuccess(level.isClientSide);
    }
}

 public void printSkyIsland(BlockPos bottom, Level level) {
        double[][] skyIsland = generateSkyIsland(width, length, scale, octaves, persistence, lacunarity, seed, maxHeight*10);
        int maxHeight = -1;
        int max_x = 0, max_z = 0;
        for (int x = 0; x < width; x++) {
            for (int z = 0; z < length; z++) {
                if (skyIsland[x][z] > maxHeight) {
                    maxHeight = (int)skyIsland[x][z];
                    max_x = x;
                    max_z = z;
                }
                System.out.print("("+x+','+z+"):"+(int)skyIsland[x][z]+" ");
            }
            System.out.println();
        }

        BlockPos.MutableBlockPos blockPos = new BlockPos.MutableBlockPos(0,0,0);
        for (int x = 0; x < width; x++) {
            for (int z = 0; z < length; z++) {
                for(int y = bottom.getY()+maxHeight ; y>bottom.getY()+maxHeight-skyIsland[x][z] ; y--){
                    blockPos.set(bottom.getX()+x-max_x,y,bottom.getZ()+z-max_z);
                    level.setBlock(blockPos, Blocks.DIRT.defaultBlockState(), 3);
                }
            }
        }
    }

 

[_p1nero]

Sorry for my poor English lol I meant an invisible "barrier" not "barrel".

[_p1nero]

4 hours ago, _p1nero said:

Thanks bro, I add the check side code and now when I right click it just give me a hand animation and generate nothing,  even an invisible barrier...
 

    @Override
    public InteractionResult useOn(UseOnContext context) {
        Level level = context.getLevel();
        if(!level.isClientSide){
            SkyIslandGenerator skyIslandGenerator = new SkyIslandGenerator();
            skyIslandGenerator.printSkyIsland(context.getClickedPos(),context.getLevel());
        }
        return InteractionResult.sidedSuccess(level.isClientSide);
    }
}

 public void printSkyIsland(BlockPos bottom, Level level) {
        double[][] skyIsland = generateSkyIsland(width, length, scale, octaves, persistence, lacunarity, seed, maxHeight*10);
        int maxHeight = -1;
        int max_x = 0, max_z = 0;
        for (int x = 0; x < width; x++) {
            for (int z = 0; z < length; z++) {
                if (skyIsland[x][z] > maxHeight) {
                    maxHeight = (int)skyIsland[x][z];
                    max_x = x;
                    max_z = z;
                }
                System.out.print("("+x+','+z+"):"+(int)skyIsland[x][z]+" ");
            }
            System.out.println();
        }

        BlockPos.MutableBlockPos blockPos = new BlockPos.MutableBlockPos(0,0,0);
        for (int x = 0; x < width; x++) {
            for (int z = 0; z < length; z++) {
                for(int y = bottom.getY()+maxHeight ; y>bottom.getY()+maxHeight-skyIsland[x][z] ; y--){
                    blockPos.set(bottom.getX()+x-max_x,y,bottom.getZ()+z-max_z);
                    level.setBlock(blockPos, Blocks.DIRT.defaultBlockState(), 3);
                }
            }
        }
    }

 

Thanks bro, It work well now! I found that it's due to my island generate algorithm. It's possible to generated an island with a height of 0 lol

Edited January 14, 2024 by _p1nero