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placing a block only places a ghost block which is not visible on the client


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using a item i am placing some blocks on nearby entities using Level.setBlock(). but when doing so it only creates a ghost block which is not there to the client, when trying to place a block in the place where the block should be the block apears.


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    public void onUse(Level pLevel, ItemStack pWand, LivingEntity pPlayer) {
            List<Entity> list = pLevel.getEntities(pPlayer, AABB.ofSize(pPlayer.position(), this.getSize(), this.getSize(), this.getSize()));
            if (!pLevel.isClientSide) {
                if (pPlayer.getItemInHand(InteractionHand.OFF_HAND).getItem() instanceof SpellItem) {
                    SpellItem spellItem = (SpellItem) pPlayer.getItemInHand(InteractionHand.OFF_HAND).getItem();
                    spellItem.cooldown(pPlayer, this.getCooldown());
                for (Entity entity : list) {
                    if (entity.isAlive()) {
                        if (!pLevel.isClientSide()) {
                            LivingEntity livingentity = (LivingEntity) entity;
                            livingentity.addEffect(new MobEffectInstance(MobEffects.WEAKNESS, 200, 1), entity);
                            livingentity.addEffect(new MobEffectInstance(MobEffects.MOVEMENT_SLOWDOWN, 200, 5), entity);
                            BlockPos pos = new BlockPos(entity.position());
                            pLevel.setBlock(pos, Blocks.ICE.defaultBlockState(), 0);
            else {
                ParticleGen.spheremove(pPlayer.position().x, pPlayer.position().y+(pPlayer.getBbHeight()/2), pPlayer.position().z, 1, pLevel, ParticleTypes.SNOWFLAKE, 0, 0, 0, 1, 50, -3, true);
            super.onUse(pLevel, pWand, pPlayer);


Edited by Just_EmSee
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pLevel.setBlock(pos, Blocks.ICE.defaultBlockState(), 0);

Passing 0 here means no updates are performed.

Using the value 2 will send updates to the client. See ServerLevel.markAndNotify() used by setBlock()

or you could just use setBlockAndUpdate() which passes the value 3 (so it also notifies neighbouring blocks of the change).


There is supposed to be a vanilla class somewhere that holds the values of these bits, but I don't know the name of it. 🙂

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