Description
Gallery
Changelog
Versions
Advanced modding library for special and legacy versions of Minecraft.
Catalyst is available for:
- Better than Adventure! 7.3, 8.0.
- StationAPI on Minecraft b1.7.3.
Catalyst is split into modules, the current available modules are described below.
Available modules:
- Core (BTA!, StAPI)
- The core module, every other module depends on this. Adds misc utility classes for modules and other mods to use. Makes creating GUIs that work in MP easier.
- Fluids (BTA!)
- Improved api for fluid storage and transportation.
- Energy (BTA!)
- Adds a simple, configurable energy api.
- Multiblocks (BTA!, StAPI)
- Adds support for multiblock structures/machines.
- Effects (BTA!)
- API for custom attributes and stackable effects.
- Multipart (BTA!)
- API and implementation for multiple block parts in one block. For BTA! 8.0 only since Catalyst 3.1.0.
- Screens (BTA! since 8.0)
- In-game visual editor and API for making GUIs easier to create.
All Versions
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[3.1.6] Catalyst 3.1.6
by sunsetsatellite on Oct 18, 2026
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- Added useful method to ScreenComposed.
[3.1.5] Catalyst 3.1.5
by sunsetsatellite on Oct 16, 2026
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- Fixed fluid pipes always transferring only 1 mB.
[3.1.4] Catalyst 3.1.4
by sunsetsatellite on Sep 17, 2026
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- Effects no longer get multiplied when going through portals.
[3.1.3] Catalyst 3.1.3
by sunsetsatellite on Sep 16, 2026
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- Fixed a crash when right-clicking with nothing in your hand.
[3.1.2] Catalyst 3.1.2
by sunsetsatellite on Sep 16, 2026
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- Added option to hide multiblock preview.
- Fixed multipart rendering on servers.
- Fix mining level of multiparts.
- Fix issue with vanilla slabs not being placed correctly.
[3.1.1] Catalyst 3.1.1
by sunsetsatellite on Sep 14, 2026
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- Fixed crash due to minor spelling mistake.
[3.1.0] Catalyst 3.1.0
by sunsetsatellite on Sep 14, 2026
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- Reimplemented the Multipart module!**
- New implementation of the fluid pipe logic!**
- Fixed bucket fluid inventory integration.
[3.0.3] Catalyst 3.0.3
by sunsetsatellite on Sep 02, 2026
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- Fix crash with fluid pipe logic.
[3.0.2] Catalyst 3.0.2
by sunsetsatellite on Aug 31, 2026
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- Fix energy nets breaking when world is reloaded.
- Reworked fluid pipe logic.
[3.0.1] Catalyst 3.0.1
by sunsetsatellite on Aug 28, 2026
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- Performance improvements.
- Fixed network classes using dependencies they shouldn't for no reason.
- Fixed player facing method.
- Fixed crash bug.
- Fixed not being able to set I/O to use any available slot.
[3.0.0] Catalyst 3.0.0
by sunsetsatellite on Aug 23, 2026
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### Updated to BTA! 8.0.1!
## New Module: Screens
## Temporarily removed the "Multipart" module
## New Module: Screens
- Adds an API for creating GUIs more easily.
- GUIs can be created in code or through an in-game editor.
- In-game editor is still a bit rough around the edges, so use it with caution.
## Temporarily removed the "Multipart" module
- Will eventually be reworked, the previous implementation wasn't that great.
[1.3.3+stapi] Catalyst (StAPI) 1.3.3
by sunsetsatellite on Jun 02, 2026
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- Fixed more multiplayer issues.
[1.3.2+stapi] Catalyst (StAPI) 1.3.2
by sunsetsatellite on Jun 02, 2026
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- Fixed minor mistake.
[1.3.1+stapi] Catalyst (StAPI) 1.3.1
by sunsetsatellite on May 30, 2026
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- Updated to StAPI alpha 6.
[2.12.0] Catalyst 2.12.0
by sunsetsatellite on May 16, 2026
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- Many improvements to the Effects module.
- Show slot id in tooltip when extra item info is enabled.
- Improvements to the structure system.
- Optimize multiblock rendering a bit.
[1.3.0+stapi] Catalyst (StAPI) 1.3.0
by sunsetsatellite on Apr 09, 2026
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- Added fully rotatable block templates
- Improvements to utility classes.
- Added a system that allows for custom structures to be created/saved at runtime.
- Deprecated and removed the multipart module in favor of a better implementation by NyaLIb.
[2.11.0] Catalyst 2.11.0
by sunsetsatellite on Jan 25, 2026
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- Small changes.
[1.2.1+stapi] Catalyst (StAPI) 1.2.1
by sunsetsatellite on Jan 25, 2026
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- Small changes.
[2.10.3] Catalyst 2.10.3
by sunsetsatellite on Dec 07, 2025
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- Gui editor renderer now shows the extra heart row when applicable, and the heart rows are now spaced correctly (by redart15)
[2.10.2] Catalyst 2.10.2
by sunsetsatellite on Nov 07, 2025
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- Permanent effects no longer incorrectly finish if the time is set to 0.
- Extra health effect is now instantly activated when it is applied.
- Effects can now be forced to expire prematurely.
- Added RecipeOutputStack.
[2.10.1] Catalyst 2.10.1
by sunsetsatellite on Nov 01, 2025
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- Fixed extra health not being removed when it should've been.
[2.10.0] Catalyst 2.10.0
by sunsetsatellite on Nov 01, 2025
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- Fixed a bug where only the first effect would be considered in attribute calculation.
- Effects can now have differing priorities.
- Added the ability to define different sources of modifiers apart from effects (so you can have, for example, items with modifiers).
- Fixed a server crash (by kheprep).
[2.9.0] Catalyst 2.9.0
by sunsetsatellite on Oct 24, 2025
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- Added a base implementation for an extra hearts effect. (by kheprep)
[2.8.1] Catalyst 2.8.1
by sunsetsatellite on Oct 20, 2025
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- Fixed crash when clicking on a empty fluid slot with an empty bucket.
- Reworked attribute command. (by kheprep)
- Add utility method for getting the renderer. (by kheprep)
[2.8.0] Catalyst 2.8.0
by sunsetsatellite on Oct 12, 2025
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- Fixed a crash that occurred if you pressed U on a fluid in TMB.
- Added fluid inventory handling classes.
[2.7.0] Catalyst 2.7.0
by sunsetsatellite on Oct 06, 2025
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- Changed and extended the way effects are rendered.
- Paused effects no longer contribute to attribute value calculation.
- It is now possible to add to or subtract from a paused effect stack.
- Add entity effect immunities.
- Fixed a bug that caused effects to be incompatible with multiplayer.
[2.6.1] Catalyst 2.6.1
by sunsetsatellite on Sep 28, 2025
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- Fixed a visual bug with effect UI rendering.
[2.6.0] Catalyst 2.6.0
by sunsetsatellite on Sep 28, 2025
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- Fixed a bug where effect stacks would not be taken into account when calculating the final value of an attribute.
- Added the ability to define custom stacking behavior for modifiers.
- You can now specify an IconCoordinate for the icon of an effect instead of a path.
[2.5.0] Catalyst 2.5.0
by sunsetsatellite on Sep 24, 2025
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- Added the StructureBuilder, allows defining multiblock structures in code.
- Added loading of structure patterns from JSON files.
- Added a bounded random method.
- Added a separate amount field to recipe symbols.
- Added a helper method to turn item stacks of fluid blocks into fluid stacks.
- Permanent effects are actually permanent now.
- Added a new ADD time type, where effect duration will be increased by a set amount each time a stack is applied.
- Fixed a bug when calculating final attribute values.
- Modifier and attribute type for numerical types does not need to match now.
[1.1.1+stapi] Catalyst (StAPI) 1.1.1
by sunsetsatellite on Sep 07, 2025
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- Fixed crash with items dropped on the ground.
