Developer Mode: Difference between revisions

[[Image:TheDayIsMine crate.png|frame|Developer Mode's cheat code on [[Easter eggs#Old Man Murray|a special crate]] in Syndicate Warehouse.]]

Developer Mode is a bundle of features created by [[Bungie West]] to help them develop [[Oni]]: a console line for entering scripting commands, manual camera controls, and various debugging features. It was traditionally activated with the [[Cheats|cheat code]] '''thedayismine''', but see "Unlocking it" and "Activating it" below before trying the code.

Despite being hinted at by a crate texture (right) and appearing on a leaked list of cheat codes during beta testing, this cheat code did not work upon Oni's release, and it was long believed that Developer Mode had been cut from retail versions of Oni. However, Dev Mode is actually present in ''all'' available versions of Oni. It just needed to be unlocked, as the community [[History of Oni modding/The tale of Dev Mode|learned back in 2006]].

You may want to read this if your Windows version of Oni is not covered by the above DLL (e.g. if you have an odd language version) or if you are on a Mac that cannot run the Intel build (if you're using an old PowerPC Mac, note that a Dev Mode-enabled version of The Omni Group's "Mac OS X port" is [[OMNI|HERE]]).

First, get a good hex editor. Ideally, it should allow you to search for sequences containing joker characters (that is, wildcards or bit masks). One such editor for Windows is [http://www.chmaas.handshake.de/delphi/freeware/xvi32/xvi32.htm XVI32]. On Macs, [http://www.cihexviewer.com/ CI Hex Viewer] is free, powerful, and can perform the search you need, but [https://ridiculousfish.com/hexfiend/ Hex Fiend] has a better comparison function so you can check your work afterward (open the original and edited binaries and choose File > Compare "Oni" and "Oni").

:When you type characters on the Data Comlink screen (the F1 pause screen), the text you enter is progressively compared with all the strings in the cheat table.

:When and if there is a match, the corresponding confirmation message is displayed – for activation, for recognition (when the cheat is not an on/off state but an action to perform), or for deactivation if the cheat was already on – and the cheat event takes effect when the Data Comlink is closed.

:In the Windows retail/demo builds and The Omni Group's PPC Mac builds, every row of the lookup table takes up 16 bytes. The 3 pointers and the ID are 4-byte data words (little-endian in Windows, big-endian on PPC Macs). If a cheat has no "disabled" message, the row's third pointer is null.

:In Bungie's original Mac build (the retail version of the application), the pointers and the ID are 2-byte words (Big Endian). Regular rows take up 8 bytes, but for one-way cheats with no "disabled" message, weird stuff happens to the third pointer and to the ID, and the row takes up 10 bytes; here, the ID can be found in what would be the first byte of the ID field instead of the second, and the remaining 3 bytes are garbage. An additional garbage byte is added between consecutive one-way cheats (0x06 and 0x07).

====Let's kill "killmequick"====

In the Windows retail, Windows demo and Omni Group PPC builds, there's extra space at the end of the lookup table and where the cheat codes/messages are stored, so one can add '''thedayismine''' as an extra cheat. In Bungie's retail Mac builds, the data is packed tighter (and the text strings are stored together with their size), so the only easy way is to replace an existing cheat. Since replacing an existing cheat is the only solution that works on all platforms, the following mini-tutorial will explain how to bind the Developer Mode cheat event to the Ultra Mode cheat code '''killmequick''' (since hardly anyone uses that cheat).

Open the executable (or the data fork of the retail Mac build), after backing it up of course…. We shall look for the last three elements of the table, corresponding to '''fistsoflegend''', '''killmequick''' and '''carousel'''.

;In the Omni Group build, look for '''00 00 00 13 ## ## ## ## ## ## ## ## ## ## ## ## 00 00 00 14 ## ## ## ## ## ## ## ## ## ## ## ## 00 00 00 15''' ([[:Image:Finding killmequick - Omni build.jpg|sample pic]])

;In the retail Mac build, look for '''00 13 ## ## ## ## ## ## 00 14 ## ## ## ## ## ## 00 15''' ([[:Image:Finding killmequick - Mac OS 9 build.jpg|sample pic]])

Developer Mode will now be enabled/disabled every time you type '''killmequick''' on the Data Comlink (pause) screen; you'll get "Ultra Mode Enabled" and "Ultra Mode Disabled" as confirmation messages.

Enter the Data Comlink (default key F1) and look for a confirmation message after typing the Developer Mode cheat '''thedayismine''' (or '''killmequick''' if you followed the DIY tutorial above). You can also just type '''x''' when the Daodan DLL or Mac Intel build is being used.

On non-U.S. keyboards, that key may not be present. The default key for your layout is depicted to the right:

:Danish QWERTY: The ½ key to the left of the numeric row.

:German QWERTZ: The circumflex accent key, ^.

:French AZERTY: The ₂ key to the left of the numeric row.

Or you can simply add a line like "bind z to console" to '''key_config.txt''' in your Oni folder and you'll be able to open the console with that key. In some cases, this bound key will not ''close'' the console, but pressing the grave accent key will, oddly enough.

The easiest way to check whether console output works at all is to press '''F8''': the character class change is acknowledged with a console message.

If you don't see anything, console output is broken in your version of Oni. The old WinXP patch (no longer offered because it is superseded by the Daodan DLL) was known to disable console output. In Windows demo Oni, both console output and console input are invisible (i.e. you can enter script commands, but you're "blindfolded").

Almost anything that you can write in a [[BSL]] script you can enter at runtime with the console. One major thing you can't do is register new variables and functions. You can only call existing functions and get/set the values of existing variables. "Existing" means either built-in ones (see [[BSL:Functions]] and [[BSL:Variables]]), or ones found in the level scripts, or ones defined by scripts you may have added to the current level.

While typing on the console line, you'll see a suggested autocompletion for the command you're typing; Tab accepts the autocomplete, and then Tab or Shift-Tab will cycle forward/backward through adjacent commands in ASCIIbetical order (A…Z comes before a…z). Previous commands from the current session can be retrieved with the up/down arrows. You can't insert/delete text in the middle of a command; you have to use Backspace. Copy and Paste are not available either.

If you press an illegal key during console input (such as F1), the input display will freeze; hit Tab a few times to fix.

===Cheating===

There are a few commands which you can type in as equivalents to regular cheat codes, and more that you can't do with cheats:

*"chr_nocollision 0 1" and "chr_nocollision 0 0" enable/disable no-clip, allowing you to walk through walls. When in no-clip mode, you can't fall; thus, jumping makes you flail in midair, and eventually you die (so try not to jump).

*"give_powerup shield" gives you a force shield (which you can't get with '''fatloot''').

*See [[Cheats]] for the BSL equivalents to various other cheats.

[[Category:Engine docs]][[Category:OniX-affected articles]]