math.geom2d.conic
Class Conics2D

java.lang.Object
  math.geom2d.conic.Conics2D

public class Conics2D
extends java.lang.Object

Generic class providing utilities for manipulating conics. Provides in particular methods for reducing a conic.

Author:

dlegland

Constructor Summary

Conics2D()

Method Summary

static Conic2D	reduceConic(double[] coefs)
static double[]	transform(double[] coefs, AffineTransform2D trans) Transforms a conic by an affine transform.
static double[]	transformCentered(double[] coefs, AffineTransform2D trans) Transforms a conic centered around the origin, by dropping the translation part of the transform.

Methods inherited from class java.lang.Object

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

Constructor Detail

Conics2D

public Conics2D()

Method Detail

reduceConic

public static final Conic2D reduceConic(double[] coefs)

transformCentered

public static final double[] transformCentered(double[] coefs,
                                               AffineTransform2D trans)

Transforms a conic centered around the origin, by dropping the translation part of the transform. The array must be contains at least 3 elements. If it contains 6 elements, the 3 remaining elements are supposed to be 0, 0, and -1 in that order.

Parameters:

coefs - an array of double with at least 3 coefficients

trans - an affine transform

Returns:

an array of double with as many elements as the input array

transform

public static final double[] transform(double[] coefs,
                                       AffineTransform2D trans)

Transforms a conic by an affine transform.

Parameters:

coefs - an array of double with 6 coefficients

trans - an affine transform

Returns:

the coefficients of the transformed conic