docs: double interpolateAngle(int index0, int index1, int index2, double offset) {
  		double angle1 = Math.atan2(histogramY[index1],histogramX[index1]);
  		double deltaAngle;
  		if( offset < 0 ) {
  			double angle0 = Math.atan2(histogramY[index0],histogramX[index0]);
  			deltaAngle = UtilAngle.dist(angle0,angle1);
  
  		} else {
  			double angle2 = Math.atan2(histogramY[index2], histogramX[index2]);
  			deltaAngle = UtilAngle.dist(angle2,angle1);
  		}
  		return UtilAngle.bound(angle1 + deltaAngle*offset);
  	}