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Last change
on this file was e4c61dd, checked in by istevanoska <ilinastevanoska@…>, 6 months ago |
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Prototype 1.1
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100644
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File size:
402 bytes
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| 1 | // Returns the 2D cross product of AB and AC vectors, i.e., the z-component of
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| 2 | // the 3D cross product in a quadrant I Cartesian coordinate system (+x is
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| 3 | // right, +y is up). Returns a positive value if ABC is counter-clockwise,
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| 4 | // negative if clockwise, and zero if the points are collinear.
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| 5 | export default function(a, b, c) {
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| 6 | return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
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| 7 | }
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