[Vanilla] Granting a specific tech boost on game start

[RayOfSpeed]

EDIT: changed my mind about how I wanted to ask this question since every time I think I've figured something out, I dead end. I think I can handle the other two components of the mod (a building that replaces the University and a unit that replaces the Warrior Monk). What I'm having trouble with is the leader trait:

Originally, my intent was to have them start with Archery, and have ranged units get +50% ranged strength while in a city or fort.

It seems like you can't just start with a tech in this game. I was initially looking at ADJUST_TECH_BOOST before I realised that just adds a % to all tech boost effectiveness, and it seems like MODIFIER_PLAYER_GRANT_SPECIFIC_TECH_BOOST only works with the pre-defined boostable techs (GREATPERSON_ROCKETRYTECHBOOST, GREATPERSON_PRINTINGTECHBOOST etc.). Is this even a possible thing to do or should I go back to the drawing board and find a new trait?

 

[Imnimo]

You can define your own modifier of the MODIFIER_PLAYER_GRANT_SPECIFIC_TECH_BOOST type to boost any tech you want. Let's look at how GREATPERSON_MATHTECHBOOST works, as an example.

If we look in GreatPeople_Scientists.xml, we can see the xml for defining the math boost:

<Modifiers>
...
        <Row>
            <ModifierId>GREATPERSON_MATHTECHBOOST</ModifierId>
            <ModifierType>MODIFIER_PLAYER_GRANT_SPECIFIC_TECH_BOOST</ModifierType>
            <RunOnce>true</RunOnce>
            <Permanent>true</Permanent>
        </Row>
...
</Modifiers>

Here we're making a new modifier called GREATPERSON_MATHTECHBOOST. It has the type MODIFIER_PLAYER_GRANT_SPECIFIC_TECH_BOOST (the other tech boosts also have this type). RunOnce and Permanent are other properties of the modifier that are necessary for this sort of single-shot effect.

<ModifierArguments>
...
        <Row>
            <ModifierId>GREATPERSON_MATHTECHBOOST</ModifierId>
            <Name>TechType</Name>
            <Value>TECH_MATHEMATICS</Value>
        </Row>
...
</ModifierArguments>

Here we've got the arguments to our modifier. The MODIFIER_PLAYER_GRANT_SPECIFIC_TECH_BOOST type takes one argument, named TechType, which defines which tech boost the modifier will grant. The Value of that argument, in this case, TECH_MATHEMATICS, is where we can specify which tech we want.

By adding your own entries to modifiers table and the modifierarguments table, you can make a new modifier that grants a boost to archery.

 

[RayOfSpeed]

Augh, I missed the TechType argument. Thanks a lot. Just need to figure out how to get it to run on game start...

 

[raen]

See LeeS Really advanced setup lite

 

[RayOfSpeed]

Will that work for making a mod for distribution or is it only for your personal copy of the game?

 

[raen]

I use it in my mod to boost some techs and to have a scout at start game.

 

[LeeS]

This lua code ought to do it. You just need to alter "CIVILIZATION_X" to the correct name of the civilzation as you have it in your XML or SQL code.

local iFreeTech = GameInfo.Technologies["TECH_ARCHERY"].Index
local sRequiredCiv = "CIVILIZATION_X"

for iLoopPlayer = 0, 62 do
	local pLoopPlayer = Players[iLoopPlayer]
	if pLoopPlayer:WasEverAlive() and pLoopPlayer:IsAlive() then
		if (PlayerConfigurations[iLoopPlayer]:GetCivilizationTypeName() == sRequiredCiv) then
			local pPlayerTechs = pLoopPlayer:GetTechs()
			if (pPlayerTechs:HasTech(iFreeTech) == false) then
				pPlayerTechs:SetTech(iFreeTech, true)
			end
		end
	end
end

It needs to be placed in a file with extension ".lua" and the file needs to be set-up in the modinfo like as this

  <InGameActions>
    <AddGameplayScripts id="FreeArcheryLua">
      <File>SomeFileName.lua</File>
    </AddGameplayScripts>
  </InGameActions>
  <Files>
    <File>SomeFileName.lua</File>
  </Files>

In Modbuddy, "AddGameplayScripts" is one of the options in the dropdown for the type of action. You have to change from "UpdateDatabase" via the dropdown after you create the new InGame Action.

 

[RayOfSpeed]

Oh, wow, I didn't even know you could do that. That makes running things on startup way easier, thanks a lot.

 

[isau]

Partial answer to your question. If you want to give them a burst of Science to start where they can choose any tech to finish in 1 turn, you can do it like this (from a special ability given to China in my Combined Tweaks mod):

INSERT INTO Requirements
    (RequirementId,         RequirementType,     Likeliness,    Inverse,     Triggered)
VALUES    ('QUO_REQ_CHINA_CITY_HAS_PALACE',         'REQUIREMENT_CITY_HAS_BUILDING',    0,0,0) ;


INSERT INTO RequirementArguments
    (RequirementId,            Name,             Type,             Value,                 Extra,     SecondExtra)
VALUES     ('QUO_REQ_CHINA_CITY_HAS_PALACE',    'BuildingType',        'ARGTYPE_IDENTITY',    'BUILDING_PALACE',    NULL,    NULL     )  ;


INSERT INTO RequirementSets
    (RequirementSetId,         RequirementSetType)
VALUES     ('QUO_REQSET_CHINA_FREE_SCIENCE_UNLOCK',     'REQUIREMENTSET_TEST_ALL') ;


INSERT INTO RequirementSetRequirements
    (RequirementSetId,    RequirementId)
VALUES     ('QUO_REQSET_CHINA_FREE_SCIENCE_UNLOCK',     'QUO_REQ_CHINA_CITY_HAS_PALACE')  ;



INSERT INTO Modifiers
    (ModifierId, ModifierType, RunOnce, Permanent, OwnerRequirementSetId, SubjectRequirementSetId)
VALUES    ('QUO_CHINA_FREE_STARTING_SCIENCE', 'MODIFIER_PLAYER_GRANT_YIELD', 1, 1, NULL, NULL) ,
        ('QUO_CHINA_FREE_STARTING_SCIENCE_PLAYER', 'MODIFIER_PLAYER_CITIES_ATTACH_MODIFIER', 0, 0, NULL,     'QUO_REQSET_CHINA_FREE_SCIENCE_UNLOCK') ;


INSERT INTO ModifierArguments
    (ModifierId,             Name,             Type,             Value,         Extra,     SecondExtra)
VALUES    ('QUO_CHINA_FREE_STARTING_SCIENCE',     'Amount',     'ScaleByGameSpeed',     '25',        NULL,     NULL),
        ('QUO_CHINA_FREE_STARTING_SCIENCE',     'YieldType',     'ARGTYPE_IDENTITY',     'YIELD_SCIENCE',    NULL,     NULL)  ,
        ('QUO_CHINA_FREE_STARTING_SCIENCE_PLAYER',     'ModifierId',     'ARGTYPE_IDENTITY',     'QUO_CHINA_FREE_STARTING_SCIENCE',    NULL,     NULL)  ;
 


INSERT INTO TraitModifiers
    (TraitType,             ModifierID)
VALUES    ('TRAIT_CIVILIZATION_DYNASTIC_CYCLE',    'QUO_CHINA_FREE_STARTING_SCIENCE_PLAYER')  ;

What this code does is attach a Modifier that is "broadcast" to all of the player's cities (QUO_CHINA_FREE_STARTING_SCIENCE_PLAYER broadcasts QUO_CHINA_FREE_STARTING_SCIENCE). Each time the player founds or captures a city the Modifier is applied. But the Modifier contains a RequirementSet check to see if this city is the capital.

In practice, the effect is to supply 25 science the moment the player founds the capital.

The reason to delay a science burst like this is to make sure the player actually gets it. A burst of this kind on Turn 1 with no cities present can result in strange behavior.

If you find directly awarding a tech doesn't work you can try the "look for a city with a Palace" method above.

 

[RayOfSpeed]

Oh, that's really neat. I'll have to give that a shot too.