Quinn's FlexHUD

Other mods that draw on the HUD can register their elements with the library through a simple registration API. Each element is described by an identifier, a resize mode, a default rectangle expressed as a RelativeRect with Anchor layouts, and a render layer. Because positions are stored relative to the screen rather than in pixels, an element keeps its place when the window size or aspect ratio changes. Before rendering, the library updates the current screen dimensions and converts each relative rectangle into an absolute one, so drawing code always works with the resolution in use.

The library includes an interactive configuration screen, FlexHudConfigScreen, where elements can be dragged and resized with handles. A resize mode limits the allowed shape of an element: free, a fixed aspect ratio, horizontal only, vertical only or fixed size. Changes apply at once without a restart, and saved positions are written through NeoForge's ModConfig system, so they persist between sessions. A saved layout overrides the default rectangle a mod registered. The library is client-side only, so servers do not need it. Quinn's FlexHUD is released under the MIT License and is open source, with its source code published publicly.