A reimplementation of The Binding of Isaac: Rebirth's proprietary animation editor. Manipulates the XML-based ".anm2" format, used for in-game tweened animations.

Features

Most things present in the original IsaacAnimationEditor.exe, except some stuff like drawing (why not use an art program!)
Smooth Dear ImGui interface; docking, dragging and dropping, etc.
Keybinds/keyboard control for common actions(see src/input.h)

Known Issues

Root Transform doesn't work for scale/rotation (matrix math is hard; if you can help me fix it I will give you $100.)
Some .anm2 files used in Rebirth might not render correctly due to the ordering of layers; just drag and drop to fix the ordering and save, they will work fine afterwards.

Dependencies

Download these from your package manager:

SDL3
GLEW

Build

After cloning and enter the repository's directory, make sure to initialize the submodules:

git submodules update --init

Then:

mkdir build

cd build

cmake ..

make -j