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- // Returns the 2D cross product of AB and AC vectors, i.e., the z-component of
- // the 3D cross product in a quadrant I Cartesian coordinate system (+x is
- // right, +y is up). Returns a positive value if ABC is counter-clockwise,
- // negative if clockwise, and zero if the points are collinear.
- export default function(a, b, c) {
- return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
- }
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