Parabola

Constructs a parabola. The general function of a parabola is f left parenthesis x right parenthesis equals a x squared plus b x plus c, with a not equal to 0; or, completing the square, f left parenthesis x right parenthesis equals a open parentheses x plus fraction numerator b over denominator 2 a end fraction close parentheses squared plus fraction numerator 4 a c minus b squared over denominator 4 a end fraction

parabola(Real, Point, Vector)

Given a real p, a point V and a vector v, constructs a parabola with focal semidistance equal to p, vertex at point V and direction given by v.

parabola(Real, Point)

Given a real p and a point V, constructs a parabola with focal semidistance equal to p, vertex at point V and direction given by left square bracket 0 comma 1 right square bracket.

parabola(Real, Vector)

Given a real p and a vector v, constructs a parabola with focal semidistance equal to p, vertex at the origin and direction given by v.

parabola(Real, Point, Vector)

Given a real p, constructs a parabola with focal semidistance equal to p, vertex at the origin and direction given by left square bracket 0 comma 1 right square bracket.