Takes a line of vectors and calculates its movement (handy if you animate a line and want to control its speed depending on its complexity)

calculateBendWay.js

example();

function calculateBendWay(vectorLengths, deltaAngles){
	if (vectorLengths.length !== deltaAngles.length) {
		throw 'the number of vectors don\'t match up with the number of angles (one less angle than the number of vectors)'
	}
	var entireBendWay = 0;
	for (var i = 0; i < vectorLengths.length; i++) {
		var vectorLength = vectorLengths[i];
		var deltaAngle = deltaAngles[i];
		var radius = vectorLength;
		var circumference = radius * 2 * Math.PI;
		var circleFraction = circumference/360*deltaAngle;
		var bendWay = circleFraction;
		entireBendWay += bendWay;
	}
	return entireBendWay;
}

function example(){
	console.log( calculateBendWay([5,5],[0,0]) );
	console.log( calculateBendWay([5,5],[0,-90]) );
}