As a consequence of this, there is no need to copy the entire file to edit it. Defines don't include the Modifiers#Static modifiers, which can serve a similar purpose but with modifier blocks.Īs defines are Lua code rather than a PDXscript-interpreted file, any Lua code can go in there, however modules allowing to go out of this directory are not available. The list of defines is vast and touches on every mechanic in the game, so if something can't be changed within the mechanic's respective files, it may be worth to check defines. Most defines are numerical in nature, but some can be strings or blocks, such as the end date at which the game over screen appears or the list of experience need for a division to progress to the next level. Some of the things included in the defines are that events by default stay for 13 days before auto-selecting the first option or that the ai_will_do value is 50% higher for focuses which were unlocked by the just-completed focus. These cannot be referenced in any other files and are only used within the internal, unchangeable code. Constants can be used as a way to link several values to be the same if they can easily be changed at any point in the development.įor example, if there is a large decision system where every decision is intended to have the same cost, then these constants may be used if the political power cost gets changed mid-development for better balance.Īnother example would be a scripted GUI container: if a large multitude of elements are to be at the same X or Y position, it might be worth it to link them to be a costant in case their position could be changed for better appearance or to fit in another GUI element.ĭefines are a particular type of constant that are used within internal calculations only, defined within /Hearts of Iron IV/common/defines/*.lua files. This can later be used in the file as, for example, cost = These definitions can be in any point of the file.Ĭonstants are available in the vast majority of game files, including most, if not all, *.txt and *.gui files.

An example definition is the following: = 10 The constants are marked with the symbol when defining or using them.

Constants serve as a way to use the same numeric value with a reference.

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