编辑“Diplomacy modding”（章节）

== Subjects ==
Subject types are defined at "common/subjects/xxx.txt".

More can be added but those must be set through events, since relevant diplomatic actions can't be added.

=== Data Structure ===
* '''calls_overlord_to_war''' - (yes/no) If the overlord joins a war launched against their subject. Has no bearing on wars started by the subject.
* '''can_be_integrated''' - (yes/no) If yes, this kind of subject can be integrated into the overlord.
* '''can_do_diplomacy''' - (yes/no) If no, this kind of subject can only undertake limited diplomacy. This typically prevents the formation of defense packs or declaring war. See [[Diplomacy modding#Diplomacy_Actions|Diplomacy Actions]] for more.
* '''can_expand''' - (yes/no) If no, this kind of subject cannot build new starbases unless otherwise specified by the game rule subject_can_expand.
* '''gets_access''' - (yes/no) Default yes. If yes, this subject may travel within their overlord's borders.
* '''gets_sensor''' - (yes/no) Default yes. If yes, this subject shares their overlord's sensor.
* '''joins_overlord_wars''' - (yes/no) If this kind of subject joins their overlord's wars (defensive or offensive).
* '''overlord_becomes_warleader''' - (yes/no) Default yes. If yes, the overlord will become the war leader (primary attacker/defender) if this subject is.
* '''overlord_resources''' - The amount of [[Economy|Economy Units]] to be produced by the overlord each month. Used for Protectorates to give the overlord Influence.
* '''research_agreement''' - (yes/no) If yes, the overlord and subject automatically enter into a research agreement. This cannot be broken unless the subject is released.
* '''research_sharing''' - (yes/no) If yes, both the overlord and subject apply a modifier to research speed when the other party already has the technology being researched. The modifier amount is set by country_subject_technology_sharing_mult. Unused in vanilla.
* '''subject_resources''' - The amount of [[Economy|Economy Units]] to be produced by the subject each month. Unused in vanilla.
* '''subject_tax_rate''' - The percentage of [[Economy|Economy Units]] to be taken from the subject and given to the overlord each month. Used for Subsidiaries and Tributaries.
* '''tech_cost_mult''' - A percentage modifier applied to the total research cost of technologies for the subject when the overlord already has the technology. Used for Protectorates.

These remaining fields are only worth considering when modifying the vanilla subjects as they interact with hard coded diplomacy actions; they will not be called for new subject types.
* '''become_vassal''' - A block of [[Conditions]] to determine whether this subject be converted into a Vassal. Used for Protectorates.
* '''can_switch_to''' - A list of subject types this subject can be called to switch to through diplomatic actions. Used for Tributaries.
* '''diplo_threat''' - A number that modifies the threat added to this empire after diplomatically asking another empire to become a subject of this type.
* '''effect''' - A block of [[Effects]] to be executed when this subject type is set to an empire. Vanilla subject types use this to prevent some empires owning incorrect types of subjects, like Awakened Fallen Empires should own a Vessal.
* '''potential''' - A block of [[Conditions]] to determine whether the relevant Diplomatic Actions of this kind of subject appear.
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