vector

Documentation

Overview

Package vector defines utility functions on vectors in 2D ambient space.

Index

• func IsNormalOrientation(v vector.V, u vector.V) bool

Functions

func IsNormalOrientation

func IsNormalOrientation(v vector.V, u vector.V) bool

IsNormalOrientation checks the angle between two vectors and returns true if the angle is strictly less than π.

A non-negative determinant of two 2D vectors indicates the angle between them is 0 <= 𝜃 <= π. We care in orientation-related problems to ensure that vectors are not anti-parallel, so an addional check is necessary.