public Point2D projectOnAC(Point2D q) {
Vector2D r = a.sub(c);
Vector2D s = r.rightNormal();
double t = ((q.sub(c)).cross(r) / (r.cross(s)));
return q.add(s.scale(t));
}
public Point2D projectOnAB(Point2D q) {
Vector2D r = a.sub(b);
Vector2D s = r.rightNormal();
double t = ((q.sub(b)).cross(r) / (r.cross(s)));
// System.out.println(t);
return q.add(s.scale(t));
}