math.geom2d.conic

Class Conic2DUtils

java.lang.Object

math.geom2d.conic.Conic2DUtils

public class Conic2DUtils
extends Object

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

Author:

dlegland

Constructor Summary

Constructors

Constructor and Description
Conic2DUtils()

Method Summary

Methods

Modifier and Type	Method and Description
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

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

Constructor Detail

Conic2DUtils

public Conic2DUtils()

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