var getPosOnCircleSmall = function(lineStart, lineEnd, t, circleFactor, pivot) {

	var lineDir = [ lineEnd[0] - lineStart[0], lineEnd[1] - lineStart[1] ];


	var lineLength = Math.sqrt(lineDir[0] * lineDir[0] + lineDir[1] * lineDir[1]);

	var circleRad = 1.0 / circleFactor * lineLength/Math.PI;

	var circleCenter = [ (lineStart[0] + lineEnd[0]) / 2 + circleRad,
					     lineStart[1] + lineLength * (1.0 - pivot)];


	var posOnCircle = [ circleCenter[0] + Math.cos(Math.PI + circleFactor*(Math.PI - (t+pivot) *  Math.PI)) * circleRad,
					    circleCenter[1] + Math.sin(Math.PI  + circleFactor*(Math.PI - (t+pivot) * Math.PI)) * circleRad]

	return posOnCircle;
};