[1.9.2] custom Extructure i need to save the blocks and the states as plain text or json

[perromercenary00]

Good days 

im currently trying to add some custome extructures to mi mod using a mix of mi custome blocks plus the vainilla ones 

in the old times a minecraft block could have up to 16 variants no more 

and there was methods to get the block metadata as an int value 

and also was method to set back the block metadata using that same  int metadata value 

but now we have properties whit object names and values 
The first i try was to save the block properties as a json file ,  but i couldn find no way to recreate back the blockstate from the json 

	    // ########## ########## ########## ##########
    public String print() {
        BlockState blkstate = this.getBlockState();
        
        String json = "";
        
	        System.out.println("blkfullname   = " + this.get_blkfullname());
	        int id = Block.getId(blkstate);
        System.out.println("id    = " + id);
	        System.out.println("world = " + this.warudo.isClientSide);
        System.out.println("pos = " + this.pos);
	        String propiedades = "";
        for (Property<?> porp : blkstate.getProperties()) {
            
            System.out.println(porp.getName() + " -> " + blkstate.getValue(porp));
            propiedades += String.format( ",\"%1$s\":\"%2$s\"", porp.getName(), blkstate.getValue(porp) );  
        }
        
        json = String.format("{\"blockname\":\"%1$s\",\"x\":\"%2$s\",\"y\":\"%3$s\",\"z\":\"%4$s\"%5$s}",
                this.get_blkfullname(), this.pos.getX(), this.pos.getY(), this.pos.getZ(), propiedades 
                );
        
        System.out.println("\n" + json + "\n" );
        return json;
    }

	{"blockname":"ender chest","x":"-29","y":"67","z":"53","facing":"north","waterlogged":"false"}
	{"blockname":"iron trapdoor","x":"-33","y":"67","z":"62","facing":"north","half":"bottom","open":"false","powered":"false","waterlogged":"false"}
	{"blockname":"stone brick wall","x":"-33","y":"67","z":"60","east":"none","north":"low","south":"none","up":"true","waterlogged":"false","west":"none"}
	{"blockname":"grass block","x":"-33","y":"66","z":"76","snowy":"false"}
	{"blockname":"scaffolding","x":"-33","y":"67","z":"76","bottom":"false","distance":"0","waterlogged":"false"}
	

######################################################################################

The second thing i try  was to use the minecraft tools
i set some blocks on the ground and save it as a nbt file using a  minecraft:structure_block

workspace/mod-1.19.2-43.1.3/run/saves/New%20World%20(1)/generated/minecraft/structures/dx.nbt

well the guide explains how to spawns the extructure minecraft:dx in to the world using chat commands 
but there's no mention on how to spawn it from the java code 
or i overlookit  anyway im not native speaker 

 

######################################################################################
i would prefer to make work the first method, briging back the Blockstates from json files 
looks like i have more control that way 

but if the second works then works 

 

 

thanks for your time 

 

 

 

 

 

 

 

 

 

 

 

 

 

Edited September 11, 2022 by perromercenary00

[warjort]

NbtUtils.read/writeBlockState()

BlockEntity.loadStatic/saveWithFullMeta()

 

The modern way to handle the BlockState is really to use the BlockState.CODEC

 

The game uses a Pallete (to save space) when saving chunk sections, see ChunkSerializer.

Or an example using NbtUtils is StructureTemplate

[perromercenary00]

i wass looking at the thing 

NbtUtils.read/writeBlockState()

BlockEntity.loadStatic/saveWithFullMeta()

reallly really dont get how to use that to save and s pawns extructures then 

hyperfocus thingly thing jumping on, end hardcoding the full thing

 

and end adding it to mi block finder class 
theres a shitty thing whit enums not acepting string values in exchange for the equivalent objects 

WallSide.valueOf(value.toUpperCase())  //dont works

WallSide.valueOf(value.toLowerCase()) //also dont works 
 

####

i would prefer a method to just take the blockstate metada as a int  and set it back as an int

after all it must be no more than a six figures binary number 

 

 

##################################################################################

do you have a link to more detailed tutrail on how to use the nbt thing to use extructures as nbts ?

 

 

 

 

 

 

 

[warjort]

Quote

i would prefer a method to just take the blockstate metada as a int  and set it back as an int

That is not how this works.

The ints used to identify blocks/blockstates are not necessarily the same when you restart minecraft.

The int -> blockstate is dependent upon which mods are loaded and in what order they register blocks.

You can't just save int ids in a file and expect them to be the same or even valid when you reload them in the future.

 

What minecraft does is use a palette (as I said above). This is to save space and redundant processing.

e.g. in simple terms you might have a save file of 3x3 blocks that is

1, 1, 2

1, 0, 0

2, 3, 1

The palette could then look something like this

0=minecraft:air

1=minecraft:stone

2=minecraft:snow{layers=4}

3=minecraft:oak_log{axis=x)

 

At reload you then deserialize minecraft:stone to find the BlockState and use that where you have stored 1 in your save.

 

What minecraft actually does with its palettes in its code is slightly more complicated than my simple explanation because it can do further optimisations.

Edited September 12, 2022 by warjort