2/25/2023 0 Comments Upk file extractorUPDATE: XSHAPE is no longer required to modify the SHA values. However, these values need to be updated every time a UPK file is modified. Used to update the SHA values used for hash checks in the XcomGame.exe to run with modified UPK files. Their primary documentation is the PatchUPK_Readme.txt file. Mod developers want the additional files in the full UPKUtils package, as well as the UPK Format Document.pdf file at the bottom of the "Files" page. The PatcherGUI download includes all of the essential UPKUtils command line files as well, so only one download is required by players. PatcherGUI is a separate download (from the same UPKUtils Nexus "Files" page) that provides a Windows "Graphical User Interface" (aka "GUI") front-end to the PatchUPK command line tool. UPKUtils is a collection of simple command line applications for analyzing and patching uncompressed UPK files. We need it to de-compress UPK files so we can edit them. This program lets you see the code almost as their creators wrote it, providing key information you will need to change UPK files, such as getting its hex representation, etc. For more information on decompilers in general, see this Decompiler Wikipedia article. Here are short descriptions of the necessary tools.Īn Unreal Engine decompiler. See reference Modding Tools - XCOM:EU 2012 for links. As that code in the executable and UPK files is in hex format, hex editing is the most efficient means to make those changes. See Hexadecimal on wikipedia for more info.Īs XCom does not directly provide a means of incorporating mods, primarily what we can do is change bytes of existing code. Expressing hex values always requires writing them as two digits, so single digit hex values in code requires the leading zero, i.e. Like decimal counting, when we want to express a value greater than what we can express in a digit, we use more digits!, so to express the number '16' in hex we would write '10' instead, and so on. Hexadecimal (hex for short) is a numbering system where a single digit can take up to 16 values, counting from 0 to 9 and then from A to F, consecutively, so with a single digit we can express a value ranging from 0 (0) to 15 (F). Unlike with DGC.ini, when editing the UPK files we do it via its hex representation, instead of editing readable text. UPK files (Unreal Package files) where the game stores compiled classes and functions (stored as UnrealScript bytecode - similar to machine language - not a table of values like in DGC.ini, although to look at it's not much different), and edit them by means of at least two programs. Hex editing is what we need to do when we want to change something in XCom that we can't achieve by merely editing the DefaultGameConfig.ini file (DGC.ini from now on). You will have to thoroughly understand those examples to apply them to your desired modding situation. Section 4 Hex editing II: Changing a small part of the script and those following are dedicated to advanced hex editing as such they are rather focused on getting as detailed and precise a set of examples as possible.It is aimed at beginners but it may contain useful tips for advanced modders. Section 3 Hex editing I: changing single values is a miscellaneous of several procedures to make a simple edit in a hex file organized in the form of a tutorial.Section 2 Programs & Tools offers a brief description of the tools used for hex editing UPK files, along with a download link and installation tips.If you know that, even if you don't know what hex editing is, you're in the right place. It is assumed you are already familiar with the DefaultGameCore.ini file options and that you are aware what changes can be achieved by just editing the ini file and what changes need of hex editing. This tutorial will attempt to cover every aspect regarding hex editing UPK files for XCom:Enemy Unknown/Enemy Within. 8.5.4 Hex code for an expression with multiple operators.7.4 Using PatcherGUI/PatchUPK pseudo-code to calculate skip size.7.3.4 Array Find, AddItem, RemoveItem, InsertItem and Sort tokens.7.2 How to locate a script’s file and memory sizes.7.1 Making changed functions compatible with other mods.7 Hex editing III: Changing a big part of the script.6.1 Understanding script’s file and memory sizes.6 Hex editing II: Changing a small part of the script.5.3.5 Constructing BEFORE and AFTER hex.5.3 Browsing UPK files with UE Explorer.
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