- 1 Modding basics
- 2 Mesh format
- 3 Mesh texture formats
- 4 Creating Sins meshes from XSI meshes
- 5 Converting Sins data files into binary
- 6 Ability modding
Modding basics[edit | edit source]
Note: This early draft of the modding instructions is far from completion. Hopefully this will be sufficient to get you started.
How Mods work
The engine will attempt to find the files it needs in mods before searching the root game path. Mods work by providing the different files to use.
Setting up mods
1. Find your <Mod Path> that the game will use.
• Start the game and open the Mods screen. (Options->Mods).
• Click the “Show Mod Path” button.
• A dialog will appear telling you where to place your mods.
Examples Vista or 7
C:\Users\<username>\AppData\Local\Ironclad Games\Sins of a Solar Empire\
2. Create a new directory here. The name of the directory will be the name of the mod. You must restart the game to see any new mods. You won’t have to restart the engine to change a mod, just to create a new one and have it appear in the list.
3. You should have included with this package a “Reference Data” folder. We have provided these files because the game shipped with most of the data files converted to binary for optimization. The reference data files are text versions of any these files so that they’ll be easier to read and modify. The engine doesn’t care if the data files are in binary or text. If you can’t find a file in the Reference Data folder this means the original file in the Sins directory didn’t need to be converted and can be used as is.
Example 1: Remove Advent[edit | edit source]
1. Create a new directory in your <Mod Path> called “01 - Remove Advent”.
C:\Users\<username>\AppData\Local\Ironclad Games\Sins of a Solar Empire\Mods\01 - Remove Advent
2. Copy your “GameInfo” directory from <Reference Data> to <Mod Path>
C:\Users\<username>\AppData\Local\Ironclad Games\Sins of a Solar Empire\Mods\01 - Remove Advent\GameInfo\
should now have many .entity files and other important data files.
4. Restart the game and enable your new mod. This may take a few seconds, the engine is restarting to use your new mod.
5. Now setup a new game. Note that you can no longer select the Advent race for your player. It has been removed.
Example 2: Weak Advent[edit | edit source]
Summary: We are going to add the advent back in, but they won’t have the technology to build all of their different capital ships.
1. Create a new directory in your <Mod Path> called “02 - Weak Advent”
C:\Users\<username>\AppData\Local\Ironclad Games\Sins of a Solar Empire\Mods\02 - Weak Advent
2. Copy your “GameInfo” directory from <Reference Data> to <Mod Path>
3. Open up <Mod Path>\GameInfo\PlayerPsi.entity in your favourite text editor.
4. Search for “capitalShipInfo”. It should be on line 29 in the file.
5. Right below “capitalShipInfo”, change the “count 5” to “count 1”, then delete the next 4 lines:
entityDefName “CAPITALSHIP_PSIBATTLESHIP” entityDefName “CAPITALSHIP_PSIPLANETPSIONIC” entityDefName “CAPITALSHIP_PSICOLONY” entityDefName “CAPITALSHIP_PSICARRIER”
You should now see:
capitalShipInfo Page:0 count 1 entityDefName “CAPITALSHIP_PSIBATTLEPSIONIC”
6. Save the file, restart the game and enable this mod. Start the game as advent and build you Capital Ship Factory. Note that you can now only build one type of capital ship!
Example 3: Not So Weak Advent[edit | edit source]
Summary: We are going to buff up the only capital ship advent can build from Tutorial 02.
1. Create a new directory in your <Mod Path> called “03 - Not So Weak Advent”
2. Follow steps 2-5 in Tutorial 02. Or simply copy the GameInfo from Tutorial 02 into this tutorial’s directory.
3. Open up CAPITALSHIP_PSIBATTLEPSIONIC.entity in your favorite text editor.
4. Search for “MaxHullPoints”. You should see “StartValue 2100.000000” right below it. Change this to “StartValue 1337000”.
Save and close this file.
5. Copy your “String” directory from <Sins Path> to <Mod Path>.
6. Open up <Mod Path>\String\English.str in your favorite text editor.
7. Search for “IDS_CAPITALSHIP_PSIBATTLEPSIONIC_NAME”. Right below this should be:
Value “Rapture Battlecruiser”
change this to:
Value “Super Duper Cruiser”
5. Save the file, restart the game and enable this mod. Start the game as advent and build you Capital Ship Factory. Now build your only Capital Ship. Note that the infocard now has the new name and the ship has new hull points.
Mesh format[edit | edit source]
Almost everything should be self explanatory after examination of any mesh file in text form except for the following:
hasValidTangents: This tells the engine whether the mesh already has valid tangents or not. If a mesh doesn’t provide valid tangents they will be generated by DirectX. This is not preferred as 3D packages tend to do a better job.
NumCachedVertexIndicesInDirection:<FRONT,BACK,LEFT,RIGHT,UP,DOWN>: These indice lists help the engine optimize a number of operations (in particular weapons fire) and each list is a sample of indices that reference vertices with normals that are within some min angle of the direction indicated and are sorted by distance to the origin of that direction. The origin of that direction is defined as the unit normal vector of that direction * mesh radius and the min angle is ((90 + 45) / 2) degrees.
The text versions of all mesh files are found in <Reference Data>\Mesh.
Mesh texture formats[edit | edit source]
Sins of a Solar Empire uses two primary texture encoding systems, one for ships (which also includes asteroids and structures) and one for planets. More mesh, texture, and rendering considerations will be covered in the future.
Ships[edit | edit source]
Textures are referenced from .mesh files in the following form:
DiffuseTextureFileName is expecting a color texture.
SelfIlluminationTextureFileName is expecting a data texture.
NormalTextureFileName is expecting a normal texture.
|Color Texture Format:||Data Texture Format:|
|red - color||red - specular|
|green - color||green - self illumination|
|blue - color||blue - reflection map|
|alpha - team color||alpha - bloom|
Normal Texture Format:
This texture expects a normal texture using NVIDIA’s DXT5_NM format. A free tool to export normal maps in this format can be found here:
Note: If your mesh doesn’t need a given texture (eg. asteroids don’t need a data texture), it should refer to “Black-da.dds”. This is because some video cards interpret no texture as all white when Sins expects all black.
Planets[edit | edit source]
Textures are referenced from .mesh files in the following form:
DiffuseTextureFileName is expecting a light side texture.
SelfIlluminationTextureFileName is expecting a dark side texture.
|Light Side Texture Format:||Dark Side Texture Format:|
|red - light side color red||red - dark side color red|
|green - light side color green||green - dark side color green|
|blue - light side color blue||blue - dark side color blue|
|alpha - specular||alpha - unused|
Creating Sins meshes from XSI meshes[edit | edit source]
The xsi format is a popular mesh format from the SoftImage|XSI 3D modelling package. Most popular 3D modelling packages can export into the xsi format. You can convert .xsi files into text versions of Sins.mesh files by using the provided command line tool “ConvertXSI.exe”. By default meshes are optimized (We only use unoptimized for internal debugging purposes). Sins of a Solar Empire does not accept .xsi files from versions of Softimage newer than 7.5.
The syntax is
convertxsi <src> <dest> <--nooptimize>
convertxsi mymesh.xsi mymesh.mesh
convertxsi mymesh.xsi mymesh.mesh—nooptimize
Converting Sins data files into binary[edit | edit source]
Once you have completed creating or editing any Sins text data files you may want to convert them into binary to speed up load times. This can be done by using the provided command line tool “ConvertData.exe”.
The syntax is
convertdata <type> <src> <dest>
The valid types are: mesh, particle, brushes and entity.
convertdata mesh mymesh_text.mesh mymesh_binary.mesh
Ability modding[edit | edit source]
Introduction[edit | edit source]
• Abilities provide a lot of the racial differentiation between the races, especially at the tactical level.
• All ability files appear in the “GameInfo” directory.
• Capital ships, cruisers, frigates, structures, and stars can all have up to 4 abilities, and so can planets with some exceptions.
Changing abilities on entities[edit | edit source]
To change which entities have which abilities, look for lines with
ability:0 “<ability name 0>”
ability:1 “<ability name 1>”
ability:2 “<ability name 2>”
ability:3 “<ability name 3>”
and replace “<ability name #>” with the name of the new ability you want the entity to have. Until you are more familiar with the details and dependencies of abilities, it is recommended that abilities be swapped between entities of the same type, and belonging to the same race (eg. moving abilities from one capital ship to another, or from one frigate to another frigate)
Modding Abilities[edit | edit source]
Abilities achieve a lot of their functionality with another object type called buffs. For the majority of abilities, you can think of the ability as a bootstrap or delivery system for a buff payload that actually does the ‘work’ of the ability.
Lets look at a simple example: AbilityAbilityGuidance.entity:
• This ability normally improves the ability cooldown rate of a targeted friendly ship, but let’s use it as a template for a new ability called Hinder Abilities that hinders the cooldown rate and increases the antimatter cost of abilities of enemy ships instead.
• First, copy the ability from <Reference Data> into <Mod Path>\GameInfo\ and rename the copy ‘AbilityHinderAbilities.entity’, then open the copy.
• The first distinguishing line is:
• You can think of BuffInstantActions as ‘fire and forget’ building blocks of ability functionality. This particular one does as it’s type name suggests: it applies a buff entity to the target object specified by the player.
Many of the following lines are parameters for this BuffInstantAction, some of which will be explained a little later. The ones we are interested in for this new ability are the next two:
buffType denotes the buff entity that will be applied to the target, so you will want to find the file ‘BuffAbilityGuidance.entity’ and copy and rename it to ‘BuffHinderAbilities.entity’. Then change the line in the ability file we’ve been working with to read
so it points to the new buff placeholder we just created.
targetFilter is a sub-object that describes what types of things are valid targets for this BuffInstantActionType. Some types may not have any target filter at all (e.g. abilities that apply the buff directly to the object with the ability)
targetFilters have three lists:
1) the ownership list specifies what relationship types are valid with respect to the target relative to the entity using the ability. More elements in this list broadens the scope of valid targets.
2) the object list specifies which types of objects are valid targets. More elements in this list broadens the scope of valid targets.
3) the constraint list specifies additional properties of the target that must all be satisfied for it to be valid. Unlike the first two lists, more elements in the constraint list narrows the scope of valid targets.
Since we want Hinder Abilities to affect enemy ships, replace the ownership parameter value “Friendly” with “Enemy”.
Also, now that this ability targets only enemy ships, we no longer need the line
so go ahead and remove it entirely. Don’t forget to decrease the count of numConstraints by 1 as well.
Lastly, don’t forget to change the name and description strings at the bottom of the ability to new ones you’ll add to the strings file:
All the changes required in this file are complete, so go ahead and save it. In order to have Hinder Abilities work as desired though, some additional changes are still required to the other file you copied and renamed: ‘BuffHinderAbilities.entity’.
Modding Buffs[edit | edit source]
• Open ‘BuffHinderAbilities.entity’
• For the most part, buffs are sort of like the target filter you modified in the last section: a collection of lists of objects. Instead of target properties like in the target filter, a buff’s lists contain different kinds of actions that the buff will perform.
• the first action type is InstantActions:
You may remember that these are the same type that abilities have, although unlike abilities, buffs are not restricted to having a single instant action. Also unlike abilities, buffs are more flexible in the conditions that can trigger these actions.
• the next action type is PeriodicActions, which are a way of performing InstantActions repeatedly on a schedule.
• next up are OverTimeActions, which usually are actions that have an updating, ongoing effect on the object with the buff on it.
For BuffHinderAbilities, we won’t need to modify any of these action types. In addition to these actions, buffs also have lists of modifiers that simply change the state of the entity the buff gets applied to:
• EntityModifiers are generally percentage change bonuses or penalties to specific attributes (eg. weapon damage or armor)
• EntityBoolModifiers are binary state changes (e.g. whether this unit is immune to damage or not)
To achieve the goal of making Hinder Abilities reduce the cooldown rate, you’ll need to modify the existing entityModifier for “AbilityCooldownRate” to negative values.
Let’s make the increased antimatter cost of abilities be +50% for all levels. To do that we’ll need to add another modifier for “AntimatterCostOfNonUltimates” like this:
Don’t forget to increment the count of numEntityModifiers by 1 to account for the newly added modifier.
The last major aspect of buffs is finish conditions, which as you might expect control when the buff will expire. Most buffs use a simple “TimeElapsed” condition, but other more specialized conditions also exist. The existing finish condition is already suitable for Hinder Abilities, so leave it unchanged. Using the instructions of part 2, go ahead and assign this new ability to a capital ship and try it out!
Closing comments[edit | edit source]
The full potential and flexibility of buffs lies in learning how to combine these independent parts of buffs in interesting ways.
• A key part of this is recognizing that many instant actions can spawn new buffs of their own, each potentially having different properties and behaviours than their parent buff.
• Many abilities follow this pattern
so look at some of these abilities to see how these relationships work.
• Poking around in other abilities will also reveal more action types and modifiers that are available for creating your abilities and buffs.