UNPKG

@fimbul-works/vec

Version:

A comprehensive TypeScript vector math library providing 2D, 3D, and 4D vector operations with a focus on performance and type safety.

github.com/fimbul-works/vec

fimbul-works/vec

7 lines (6 loc) • 286 B
1
2
3
4
5
6
7
/** * Gets the angle between a 2D vector and the positive y-axis in radians. * @param {ArrayVector2D} xy - Vector as `[x, y]` * @returns {number} Angle in radians, always in the range [0, 2π) */ export const angleY2D = (xy) => Math.atan2(xy[0], xy[1] + (xy[0] < 0 ? Math.PI : 0));