Moog's Structure Lib (moogs_structures) in FTB Skies 2: Aero

Same as in the All the Mods 10 8.1 guide

Moog's Structure Lib is a library mod for the Moogs Structure series. It provides flexible, data-driven structure generation systems that other mods build on, so it works behind the scenes to support those mods.^[1]

What it offers

Mod developers add it as a dependency and use its structure types and placement systems. It includes a complete barn structure example that shows how to use all of its features. The project also links a wiki with step-by-step guides, JSON references, real examples from MoogsVoyagerStructures and troubleshooting tips.^[1]

It can also be installed server-side only, and it is released under the GNU Lesser General Public License v3.0 only.^[1]

In this pack

The pack includes version 3.1.2, the NeoForge 1.21.1 build (MoogsStructureLib-neoforge-1.21.1-3.1.2.jar). It has been part of the pack since version 4.13 or earlier.^[2]

Same as in the All the Mods 10 8.1 guide

There's nothing to craft here, and that's the first thing to know. Moog's Structure Lib is a library mod that gives other mods data-driven structure generation systems to build on, so it isn't something you play with directly.^[1]

In this pack there are no quests involving the mod and no recipes that produce its items. That's why this section has no recipe blocks: there's no in-pack recipe to point you to.^[1]

What to do first

1. Don't go looking for an item to make. The mod is a dependency for other mods in the Moog's structure series, and it works behind the scenes.^[1]
2. Explore the world as normal. Structures that rely on this library are generated by the mods that use it, so you find them while exploring.^[1]
3. If you run a server, the mod can be installed server-side only.^[1]

Structure rarity

The mod does have rarity settings. Its config text says one option multiplies the spacing of every Moog's structure, where a higher value means rarer structures and a lower value means more common ones. There's also a per-mod version that multiplies the spacing of every structure from one specific mod.^[3]

Unverified The config file name, the default values and any changes this pack makes to the rarity settings couldn't be confirmed, so check the config files in your own instance before changing them.

Same as in the All the Mods 10 8.1 guide

Moog's Structure Lib is a library mod, so there are no machines, power or item automation to learn here. What it offers is a data-driven structure generation system that other mods build on, so its core mechanics are about how structures get placed in the world.^[1]

What the library does

Other mods add it as a dependency and use its structure types and placement systems. It includes a complete barn structure as an example of how to use all of its features.^[1]

It can also be installed server-side only, so a server can run it without every player needing it on the client.^[1]

Structure rarity

The mod's language file describes a universal rarity option that multiplies the spacing of every Moog's structure. Higher values make structures rarer and lower values make them more common.^[3]

There is also a per-mod rarity option that multiplies the spacing of every structure belonging to one particular mod.^[3]

Unverified The sources here show no config file for this mod in the pack, so the exact option names and the spacing values the pack uses are unverified. Don't assume the pack has changed structure spacing.

Unverified The mod has its own online wiki with JSON references and examples for structure authors, but it was not available as a source here, so the details of its structure types and placement systems are not covered in this guide.

FTB Skies 2: Aero 1.10.0 ships Moog's Structure Lib 3.1.2 (the NeoForge 1.21.1 build). The mod was already in the pack by 1.0.3 or earlier. The changes below come from the mod's own changelogs, and all of them are bug fixes.^[4]

3.1.2 (the version in this pack)

• Fixed a possible crash during world generation or /reload when a structure with piece-count limits was placed on several threads at once.^[5]
• Armour stands and other structure entity processors now generate correctly on every loader, not only Fabric.^[5]
• Structures with item frames, glow item frames, paintings or leash knots no longer spam "invalid position" errors into the log. This applies automatically to pieces placed through the mod's own pool element types: versioned_single_pool_element, mirroring_single_pool_element and legacy_ocean_bottom_single_pool_element.^[5]

3.0.3

• Fixed a worldgen crash during chunk generation. It happened when another mod's beardifier or density function mixin invalidated the enhanced-beardifier iterator between hasNext() and next(), and computeDensity then hit a null pointer error. It was reported on Fabric with Terralith installed (issue #12).^[6]

3.0.2

• Version-mapping fallback warnings are now silent by default. If you want to see them, turn them on with the command /moogs_structures debug on (issue #10).^[7]