org.sunflow.math
Class Solvers

java.lang.Object
  org.sunflow.math.Solvers

public final class Solvers
extends java.lang.Object

Constructor Summary

Solvers()

Method Summary

static double[]	solveQuadric(double a, double b, double c) Solves the equation ax^2+bx+c=0.
static double[]	solveQuartic(double a, double b, double c, double d, double e) Solve a quartic equation of the form ax^4+bx^3+cx^2+cx^1+d=0.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Solvers

public Solvers()

Method Detail

solveQuadric

public static final double[] solveQuadric(double a,
                                          double b,
                                          double c)

Solves the equation ax^2+bx+c=0. Solutions are returned in a sorted array if they exist.

Parameters:

a - coefficient of x^2

b - coefficient of x^1

c - coefficient of x^0

Returns:

an array containing the two real roots, or null if no real solutions exist

solveQuartic

public static double[] solveQuartic(double a,
                                    double b,
                                    double c,
                                    double d,
                                    double e)

Solve a quartic equation of the form ax^4+bx^3+cx^2+cx^1+d=0. The roots are returned in a sorted array of doubles in increasing order.

Parameters:

a - coefficient of x^4

b - coefficient of x^3

c - coefficient of x^2

d - coefficient of x^1

e - coefficient of x^0

Returns:

a sorted array of roots, or null if no solutions exist