Item Map NBT data

[IKnowImEZ]

So im trying to read a map_whatever.dat to get the information about the map but i don't know how to read it, i have tried for the last 2 days messing around with nbt and really got no wear, got any tips or code?

 

sorry this probably made no sense, i don't know how to describe what im trying to do

Edited April 16, 2018 by IKnowImEZ

[jabelar]

https://minecraft.gamepedia.com/Map_item_format

[IKnowImEZ]

  On 4/16/2018 at 1:47 AM, jabelar said:

https://minecraft.gamepedia.com/Map_item_format

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Yes, i know but how would i edit it from a mod? or get the data from a mod, i can't get to the map_whatever.dat file to get the info in it

 

and i cant get nbt data from the item the player is holding because the data i am looking for is not stored there its stored in the map_whatever.dat

Edited April 16, 2018 by IKnowImEZ

[Draco18s]

Step 1: Get the map's item stack

Step 2: Read the stack's NBT

[IKnowImEZ]

  On 4/16/2018 at 2:21 AM, Draco18s said:

Step 1: Get the map's item stack

Step 2: Read the stack's NBT

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im not 100% sure how to do it, like this? player.getHeldItemMainhand().getTagCompound().getTagList("what would i put hear", 10)

 

or somthing like, i dont think it will work because a maps only nbt is only display and decorations

[Draco18s]

  On 4/16/2018 at 2:41 AM, IKnowImEZ said:

player.getHeldItemMainhand().getTagCompound().getTagList("what would i put hear", 10)

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getTagList is just one of the many types of tag that an NBT can contain.

 

As for "what you put here" (which is spelled "H-E-R-E" because "hear" is what you do with your ears)...

 

[IKnowImEZ]

  On 4/16/2018 at 4:06 AM, Draco18s said:

getTagList is just one of the many types of tag that an NBT can contain.

 

As for "what you put here" (which is spelled "H-E-R-E" because "hear" is what you do with your ears)...

 

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Sorry my bad, i got this little bit of code, it doesn't work, i dident expect it to work because of getTagCompound().getTagList("scale", 10);, do you know how i would get the "scale" tag value?

 

NBTTagList nbttaglist = player.getHeldItemMainhand().getTagCompound().getTagList("scale", 10);
       
        for (int j = 0; j < nbttaglist.tagCount(); ++j)
        {
            NBTTagCompound nbttagcompound = nbttaglist.getCompoundTagAt(j);
                        
            System.out.println(nbttagcompound.getDouble("scale"));
        }

 

[Draco18s]

Tag "scale" isn't of type List is it?

Lets go back to that same bit of documentation...

[IKnowImEZ]

so i got this image of what the player would be holding but of the nbt data, from the last picture you showed me i would think 5 entries is the root tag, but that would make sense, and this code just doesnt look right, and i cant get the map item format code from the nbts tags i showed you in the picture so i dont understand that.

 

NBTTagList nbttaglist = player.getHeldItemMainhand().getTagCompound().getTagList("5 entries", 10);
        
        
        for (int j = 0; j < nbttaglist.tagCount(); ++j)
        {
            NBTTagCompound nbttagcompound = nbttaglist.getCompoundTagAt(j);
                        
            System.out.printIn(nbttagcompound.getByte("Scale"));
        }

 

Edited April 16, 2018 by IKnowImEZ

[Draco18s]

 

No, that's the item itself. As evidenced by:
 - a tag called "tag"

 - a byte called "slot"

 - a byte called "count"

 - a child entry in a list called "Inventory"

And most blatantly obvious of all:

 - a string called "id" with a value of "minecraft:filled_map"

 

The tag "tag" is the data you're after, and that NBT visualizer cannot for some reason show you the data you want.

 

Also:

  On 4/16/2018 at 5:22 AM, IKnowImEZ said:

.getTagList("5 entries", 10)

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Holy shit, you actually thought "5 entries" was the name of the tag.

Edited April 16, 2018 by Draco18s

[IKnowImEZ]

  On 4/16/2018 at 5:34 AM, Draco18s said:

 

No, that's the item itself. As evidenced by:
 - a tag called "tag"

 - a byte called "slot"

 - a byte called "count"

 - a child entry in a list called "Inventory"

And most blatantly obvious of all:

 - a string called "id" with a value of "minecraft:filled_map"

 

The tag "tag" is the data you're after, and that NBT visualizer cannot for some reason show you the data you want.

 

Also:

Holy shit, you actually thought "5 entries" was the name of the tag.

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So im not going be able to get the map data like Scale, xCenter, zCenter? and no tbh lol just the picture u send made me think for a sec but not really

[Draco18s]

The data exists, but you're using an external program to examine the player's inventory and can't see it.

You need to write the code to extract it.