Curve Animator

Curve Animator is built on FancyMenu, which must also be installed. It extends the keyframe editor of FancyMenu's Element Animator: a Movement Curve button opens a visual editor where the path an element travels and the speed of that travel are set separately by dragging control points. A movement curve can produce straight lines, arcs or custom paths, while a time curve sets acceleration such as ease-in and ease-out. Both curves are edited on screen rather than typed as numbers.

Animations can run when a menu opens, when it closes, on both events, or in a loop while the menu stays open. Several Element Animators can be combined on the same button or element, so an entry animation can play while a looping ambient motion runs at the same time. Animations update every frame, which keeps movement smooth on high refresh-rate displays.

Curve Animator is client-side only, so it has to be installed on the player's client and not on a server. The files target Fabric for 1.21.1 only, and the mod is released under the MIT License but is not open source.