Features:

- Easy & Stable: Beautiful, stable secondary motion from a single AnimGraph node. A length-preserving Verlet solver stops meshes stretching or exploding, with consistent results at any frame rate.

- Art-Directable: Set up sphere/capsule/box/plane collisions visually in the viewport, and shape motion with modular forces (wind, gravity, curve, custom Blueprint). BoneConstraint and SyncBone stop cloth clipping through the body.

- Data-Driven & Runtime-Controllable: Reuse setups via DataAsset/PhysicsAsset, and drive any parameter or force at runtime from Blueprint or C++ (plus Anim Notifies for forces and alpha).

- Lightweight: Custom PhysX-free algorithm on the animation worker thread, with optional shared collision. Minimal footprint, fits any project scale.

Code Modules:

- KawaiiPhysics: Runtime

- KawaiiPhysicsEd: UncookedOnly

Number of Blueprints: 0 (Pure C++ with Blueprint-exposed interfaces)

Number of C++ Classes: 38

Network Replicated: No

Supported Development Platforms:

- Windows: Yes (editor module also builds on Mac/Linux)

Supported Target Build Platforms:

- Windows

Documentation Link:
https://pafuhana1213.github.io/KawaiiPhysics-Portal/docs

Example Project:
https://github.com/pafuhana1213/KawaiiPhysics

Important/Additional Notes:

- Although only Windows is listed, it should work on almost all UE platforms. To build on a non-Windows platform, edit the .uplugin.

pafuhana1213

pafuhana1213

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