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hugooliveirad/angles-fun.js

Created September 16, 2015 16:53
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Angles fun
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angles-fun.js
// radians->degrees
function degrees(radians) {
return radians * 180 / Math.PI;
}
// gets two positions { x: Number, y: Number } and return
// angle between them in radians
function getAngle(pos1, pos2 = {x: 0, y: 0}) {
let [dx, dy] = [pos1.x - pos2.x, (pos1.y - pos2.y) * -1]
return Math.atan2(dy, dx);
}
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