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@fimbul-works/vec

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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

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/** * Gets the angle between a 3D vector and the positive z-axis in radians. * @param {ArrayVector3D} xyz - Vector as `[x, y, z]` * @returns {number} Angle in radians, always in the range [0, 2π) */ export const angleZ3D = (xyz) => Math.atan2(Math.sqrt(xyz[0] ** 2 + xyz[1] ** 2), xyz[2]);