public Vector getPerpendicularVectorPointedTowards(
Point2D startPoint, double magnitude, Point2D directionPoint) {
Vector perpVect = this.moveTo(startPoint);
if (perpVect.relativeCCW(directionPoint) > 0) {
// we need to turn counter clockwise
perpVect = perpVect.rotate(-1 * Math.PI / 2.0);
} else {
// we'll rotate clockwise
perpVect = perpVect.rotate(Math.PI / 2.0);
}
return perpVect.rescale(magnitude);
}
public Vector getPerpendicularVector(Point2D startPoint, double magnitude) {
Vector perpVect = this.moveTo(startPoint);
perpVect = perpVect.rotate(Math.PI / 2.0);
return perpVect.rescale(magnitude);
}