Freeform Gesture Detector

Multi-touch transform gestures for Android.

FreeformGestureDetector (2018) is an Android library that converts multi-touch gestures into incremental Matrix transformations.

It processes any kind of touch gesture, from single-finger dragging to multitouch skew and scale, and spits out the corresponding Matrix transforms needed to render that manipulation.

This library arose from the development of Hypertangram. I wanted free manipulation of puzzle pieces because I wanted intuitive game controls.

Credits to Matrix.setPolyToPoly🡵 for making this easy.

It’s open-source and available on GitHub🡵.