detect-collisions
Polygons, Ellipses, Circles, Boxes, Lines, Points. Ray-Casting, offsets, rotation, scaling, padding, groups.
check2d
check2d is a feature-complete library to detect collisions between all possible kinds of shapes. It uses Bounding Volume Hierarchy (BVH) for sweep wide quick tree trim phase, and the Separating Axis Theorem (SAT) for accurate detection inside nearby group
cg-point
An object representing a point in a two-dimensional coordinate system.