Minecraft Forums

Admittedly, 500 ISE gave me the idea but here is an offset list for you iOS users out there.


Thanks to CaptainJR for compiling the entities list for me

Hope this helped.

What you can do with these offsets

First download Jocopa3's mod making program

The Following Uses Are True For Both iOS And Android
Refer to 500 Internal Service Error's thread for Android offsets

Then you have everything you need to make block ID changing mods
There are 4 principle things you can do with block ID changing mods and I will address each separately

World Generation (Blocks only)
Say I took the offset of grass (000F8A28) and I were to change the code to the data value of TNT (2E), then whenever I create a new world, the generator will place TNT instead of grass. You can do this multiple times to create mods like the drether and inferno dimension mods.

Simple Replacement (Blocks only)
In some but not all cases, if you were to take the offset of TNT (000FAFD0) and change it to grass (02), then when playing a pre-existing map. Instead of showing grass it will show TNT. This can make quick and temporary dimension mods but is less consistent. I do not recommend testing this on a world you care about

Additional Items in Creative (Blocks and Items)
If I were to take the offset of say bookshelves (000FB0E0) and change it to the ID of Glowing Obsidian (F6) then the creative inventory will display Glowing Obsidian rather than bookshelves. In some cases (like most water in creative mods) it will display the original block but with a red border. This means that the block will look and behave like the original block until the mod is unpatched, then all copies of that block will change to the intended block (in this case bookshelves would become water)

Alter Crafting Recipes (Blocks and Items)
Normally a log can be crafted into 4 planks, but if you take the offset of planks (000F8D3C) and change the value to that of TNT (2E) then one log can be crafted into 4 TNT instead.

Change a Mob's Weapon (Items only)
If you were to take say the offset of a golden sword (000C6D84) and change it to the ID of a feather (20), then zombie pigman would hold a feather instead of a golden sword.

Entity Changes
Pretty much all entity changes behave in a similar manner. Say I were take the offset of dropped items (000A70CC) and turn them into creepers (21) then whenever I reload the map the dropped items will be creepers. An important thing to keep in mind is health, obviously all mobs have healths but not all items do. This is why if you were to do a shot arrow to creeper mod, you would get a dead creeper. An interesting change to note though is the change of an entity to primed TNT, this will result in that entity exploding when the world is reloaded . One last thing to keep in mind is that sometimes the physics do not work, for example pretty much all mods that become paintings will fail, an arrow in flight cannot become a pig (although one that has landed can, albeit a dead pig).

Ok, so now that we know what to do I thought I would add the two ways of doing mods

Jocopa3's Mod Maker
Jocopa3 made a mod maker (download above) and it is fairly easy to use
For some reason whenever I download the program and launch it, it looks like this:

not very helpful. This confused me until I realized you can pull the tab in the bottom right to make it look like this:

sounds easy and I felt stupid afterward but hey, it might help one of you.
So this program is rather straight forward; say I wanted to change Grass to Diamond Blocks, I would take the offset for Grass (000F8A28) and put it in the offset box like so:

Then I would take the ID I want to change it to (in this case Diamond Block: 39) and put that in the Hex box like so:

Then I will click add and it will go in the table on the right:

I can repeat this as many times as I want to change as many offsets as I want.
When I am done click save (control-s or file<save) and rename it such that you put periods rather than spaces:

Then I suggest you upload it to dropbox, right click the file and you should get the following list, select "Copy Public Link"

That is your working mod link, by posting that others can download and enjoy your mod

iFile
This method is a little more confusing but can be done on your phone directly, you cannot share this mod but it is the quickest way to test.
First clear MCPEPatch from your multitasking
Using iFile (MyFile may also work) go to /var/mobile/Library/Preferences and near the bottom of the page is a file called nl.intyre.mcpepatch.plist
Open this file up with a text editor and you will see all of your downloaded mods.
Once here you can write your mod between any other mods
All mods should start with the following sequence, if you get confused, looking at mods you already downloaded should help
(I will use the Grass to Diamond mod as an example)

 <array>
<string>Mod name (In this case: Grass to Diamond)</string>
<string>Is the mod active(yes or no, start with no)</string>

After that header is a repeating sequence for each offset and goes as follows:

 <dict>
<key>hacked</key>
<string>New code (in this case 39)</string>
<key>offset</key>
<string>The offset (in this case 000F8A28)</string>
<key>original</key>
<string>Original code (In this case 02)</string>
</dict>

Once you are done, finish off with

 </array>

So this mod would end up looking like:

 <array>
<string>Grass to Diamond</string>
<string>no</string>
<dict>
<key>hacked</key>
<string>39</string>
<key>offset</key>
<string>000F8A28</string>
<key>original</key>
<string>02</string>
</dict>
</array>

(In all honesty, it is a lot easier to just copy and paste a pre-existing mod then change the offset and code, but that is just me)
If you did this right you should see your new mod, if not click the downloader tab and then back to the patches tab, this works too.

Side note: